identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
D0663914FF9BFFFE1B95FBB5FB1893C2.text	D0663914FF9BFFFE1B95FBB5FB1893C2.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis schmidtii Heiden 1928	<div><p>20. Cocconeis schmidtii Heiden (Figs 53–56, 106, 107)</p> <p>Basionym: Heiden and Kolbe 1928, p. 587.</p> <p>Reference: Simonsen 1992, p. 33, pl. 33, figs 1–5, pl. 34, figs 1–3.</p> <p>Description: Valves broadly elliptical, 17–61 μm long, 11–44 μm wide. SV: sternum narrow. Central area very small and circular, but indistinct in small-sized valves. Transapical striae parallel in the middle, strongly radiate towards the apices, 15–20 in 10 μm, interrupted by zig-zag longitudinal hyaline lines, areolae in a stria transversely elongated, 7–12 in 10 μm. RV: valve surface slightly depressed concentrically in the submarginal area. Raphe straight and linear, the terminal ends of the raphe distant from apices without any areolation, sternum narrow. Central area small and circular. Transapical striae parallel in the middle, strongly radiate towards the apices, 13–17 in 10 μm, with 13–23 circular areolae in 10 μm of stria.</p> <p>Remarks: The species is very similar to Cocconeis shikinensis in morphology. If one addition is made to the differences between the two species, the transapical striae of the former are strongly radiate towards the ends of valve, which is distinct from the latter.</p> <p>Occurring in the type locality, Kerguelen Island, in the Antarctica of the Indian Ocean. This taxon has been described from the type locality of Kerguelen Island in the Subantarctic of the Indian Ocean (Simonsen 1992), in coastal areas of King George Island, and the western Antarctic Peninsula (Lange et al. 2018). This taxon was encountered frequently as epiphytes along the Seogwipo coast; it is herein newly described for South Korea.</p></div> 	http://treatment.plazi.org/id/D0663914FF9BFFFE1B95FBB5FB1893C2	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF9BFFFD1B95F8E5FBA196A3.text	D0663914FF9BFFFD1B95F8E5FBA196A3.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis scutellum Ehrenberg	<div><p>21. Cocconeis scutellum Ehrenberg (Figs 45–48)</p> <p>Basionym: Ehrenberg 1838, p. 194, pl. 14, fig. 8.</p> <p>References: Poulin et al. 1984, p. 56, figs 43–48; Mizuno 1987, p. 592, figs 1–5, 6A–F; De Stefano et al. 2008, p. 508, figs 19–35.</p> <p>Description: Valves elliptic-lanceolate to broadly elliptical, 13–31 μm long, 12–24 μm wide. SV: sternum narrow and linear, and central area not developed Transapical striae coarsely punctate, radiate towards the apices, 9–10 in 10 μm, uniseriate entirely, but bi- and tri-seriate near the mantle, areolae in striae coarsely circular, 9–12 in 10 μm of stria. RV: A narrow hyaline band in the submarginal area along the valve margin. Striae radiate, 10–13 in 10 μm, uniseriate, becoming biseriate on the mantle, areolae circular, 16–19 in 10 μm. Valvocopulae closed, having short fimbriae.</p> <p>Remarks: Cocconeis scutellum is the most commonly reported in taxonomical and ecological research among the genus Cocconeis, but its morphological features have been neglected for a long time in the past. However, with the increase of SEM morphology, C. scutellum was recognized as a complex composed of many heterogeneous taxa rather than a single one (De Stephano et al. 2008). In the meantime, a lot of new taxa have been recently described as new species, and many specimens that have been reported as C. scutellum have been separated as new species (Riaux-Gobin et al. 2013). Therefore, the morphological boundary of the C. scutellum var. scutellum became very important, and it is not easy to identify the nominate variety.</p> <p>The important feature of circumscribing C. scutellum from neighboring species is the poroid areolae on striae of SV, becoming biseriate or triseriate towards the mantle (Mizuno 1987, De Stefano et al. 2008). Loculiferous bands in the margins of the RV, which is fimbriate valvocopulae, is visible.</p> <p>Many frustules of the C. scutellum were also found in the Seogwipo coast, and the morphology of valves was very diverse and there were too many complex morphology and similarities, making it difficult to identify them. Although many images of light and electron microscopy were obtained, accurate identification was difficult. Only two species of C. scutellum and C. speciosa were extracted, and the rest were all set aside for later work.</p> <p>This taxon is widespread and cosmopolitan along the coasts of marine and brackish waters, and has even been found in Antarctic regions (Witkowski et al. 2000, De Stefano et al. 2008). In South Korea, it was reported frequently as planktons and periphytic off the coast (Lee 1995), as epiphytes on Zostera in Geoje Island (Chung &amp; Lee 2008), and as the epipsammic on the sand flat of the Nakdong River estuary (Joh 2012). In this survey, common as epiphytes on seaweeds along the Seogwipo coast, particularly abundant in the lagoon (St. 3).</p> </div>	http://treatment.plazi.org/id/D0663914FF9BFFFD1B95F8E5FBA196A3	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF89FFEC1B95FB76FEBC93F8.text	D0663914FF89FFEC1B95FB76FEBC93F8.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis callosa Meister 1937	<div><p>1. Cocconeis cf. callosa Meister (Figs 79–83)</p> <p>Basionym: Meister 1937, p. 266, pl. 8, fig. 11.</p> <p>Reference: Riaux-Gobin et al. 2017, p. 57, figs 9, 44–51.</p> <p>Description: Valves rather circular, 27–54 μm long, 21–49 μm wide. SV: sternum narrow and bent in opposite directions at the apices, forming a distinct sigmoid curvature. Central area not developed, but only a few areolae missing in the middle to form a small hyaline space. Transapical striae radiate in the middle and strongly radiate towards the apices, 13–15 in 10 μm, formed by coarse areolae, with 10–11 areolae in 10 μm of stria. RV: raphe and sternum strongly sigmoid, with opposite curvatures of the terminal ends, both ends of raphe and sternum distant from the apices. Central area extended transversely in a narrow hyaline area not reaching the margins. Transapical striae, 13–14 in 10 μm distinctly areolae, with 12–16 in 10 μm of stria.</p> <p>Remarks: Although there was no type specimen of the species, and the morphology of RV was not even described in the original statement, Riaux-Gobin et al. (2017) searched the Meister’s collections, and erected Cocconeis cf. callosa as a legitimate taxon. This species has only been reported from the type locality, Nagasaki in Japan. In the Seogwipo coast of Jeju Island, very rare as epiphytes from a small rock pool (St. 2), representing a new record for South Korea.</p> </div>	http://treatment.plazi.org/id/D0663914FF89FFEC1B95FB76FEBC93F8	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF89FFEA1B95F90CFDA29462.text	D0663914FF89FFEA1B95F90CFDA29462.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis capensis (Cholnoky) Witkowski	<div><p>2. Cocconeis capensis (Cholnoky) Witkowski (Figs 9–11)</p> <p>References: Cholnoky 1963, p. 42, figs 6, 7; Witkowski et al. 2000, p. 103, pl. 40, figs 9, 10; Riaux-Gobin et al. 2017, p. 58, figs 20–23.</p> <p>Description: Valves elliptical, 10–17 μm long, 5–10 μm wide. SV: sternum linear, and central area not developed. Transapical striae coarse, composed of elongated areolae, 20–22 in 10 μm, crossed by a hyaline longitudinal line, and radiate towards the apices. Striae as bundle of 1–3 rows of areolae. One row of dense areolae on the margins of valve. A complete frustule is observed (Fig. 12).</p> <p>Remarks: This species was previously reported as Cocconeis clandestina var. capensis Cholnoky from the type locality of the Steanbras River of South Africa (Cholnoky 1963), and from Saldanha Bay of South Africa (Giffen 1976). It occurred in the Azores of Portugal (Stidolph et al. 2012), and in Nagasaki of Japan (Riaux-Gobin et al. 2017). In the Seogwipo coast of Jeju Island, rare in a single sample on seaweeds collected from a small rock pool; it is herein newly described for South Korea.</p> </div>	http://treatment.plazi.org/id/D0663914FF89FFEA1B95F90CFDA29462	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF8FFFEA1B95FE85FDA297FE.text	D0663914FF8FFFEA1B95FE85FDA297FE.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis clandestina A. Schmidt 1894	<div><p>3. Cocconeis clandestina A. Schmidt (Figs 23, 24)</p> <p>Basionym: Schmidt et al. 1894a, pl. 192, figs 28, 29.</p> <p>References: Hustedt 1933, p. 331, fig. 784; Witkowski et al. 2000, p. 103, pl. 41, figs 20–25. Description: Valves elliptical to nearly circular, 18–29 μm long, 14–18 μm wide. SV: sternum narrow and linear. Transapical striae biseriate and radiate towards the apices, 5–6 in 10 μm, with 10–12 areolae in 10 μm of stria. No RV observed.</p> <p>Remarks: This taxon is widespread along the coast of northern Europe (Hustedt 1933, Witkowski et al. 2000) and common in the Baltic Sea (Witkowski et al. 2000). In the Seogwipo coast, very rare from small rock pools; it is herein newly described for South Korea.</p></div> 	http://treatment.plazi.org/id/D0663914FF8FFFEA1B95FE85FDA297FE	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF8FFFEA1B95FCF1FC9E90AA.text	D0663914FF8FFFEA1B95FCF1FC9E90AA.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis conspicua A. Schmidt	<div><p>4. Cocconeis conspicua A. Schmidt (Figs 87, 105)</p> <p>Basionym: Schmidt et al. 1894b, pl. 196, figs 27–30.</p> <p>Description: Valves broadly elliptical, but slightly oblique along apical axis, 31–38 μm long, 24–30 μm wide. SV: sternum broadly elliptical and sigmoid. Longitudinal hyaline area bisecting twice striae between sternum and valve margins, a row of very large puncta on the outer hyaline area, the largest punctum in the area 1.5 μm in diameter. A longitudinal line crossing striae between the sternum and inner hyaline area. Transapical striae radiate towards the apices, 26–27 in 10 μm, striae composed of elongated areolae. RV: No RV observed, only trace of sigmoid raphe could be seen.</p> <p>Remarks: This taxon is characterized by a marginal axial hyaline area on each part of the SV and the presence of large round structures in these hyaline areas. There are no descriptions of this taxon except for the illustrations at the times of the naming. From the original valve drawings (Fig. 92) of Schmidt et al. (1894b), valves are 27–38 μm long and 18–29 μm wide. At that times, it was found in Kings Mill Islands (now Gilbert Islands) and Samoa in the Pacific Ocean, in Bissex of Barbados in the West Indies, and in Singapore (Schmidt et al. 1894b). However, it is placed on the checklist of marine diatoms in the Caribbean Sea (Navarro and Hernández-Becerril, 1997). Based on the localities found to date, it is a typical tropical taxon. Very rare in a few samples as epiphytes on seaweed in rock pools (St. 2) of Seogwipo coast; it is herein newly described for South Korea.</p></div> 	http://treatment.plazi.org/id/D0663914FF8FFFEA1B95FCF1FC9E90AA	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF8FFFE91B95FA5DFACB95F6.text	D0663914FF8FFFE91B95FA5DFACB95F6.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis convexa Giffen	<div><p>5. Cocconeis convexa Giffen (Figs 42–44, 100–102)</p> <p>Basionym: Giffen 1967, p. 257, figs 26–28.</p> <p>References: Witkowski et al. 2000, p. 104, pl. 37, figs 5, 6, pl. 41, figs 1–4; Suzuki 2001, p. 60, figs 1–35; Riaux-Gobin et al. 2011, p. 22, pl. 3, figs 1–5, pl. 32, figs 1–7.</p> <p>Description: Valves broadly elliptical to almost rhombic, 16–25 μm long, 12–18 μm wide. SV: sternum narrow and linear, and central area not developed. Transapical striae parallel at middle, strongly radiate towards the apices, and interrupted by many slightly undulate hyaline lines, 37–41 in 10 μm. RV: raphe straight, the central ends of raphe slightly curved to the opposite directions, the terminal ends of the raphe distant from the apices without areolation and sternum narrow. Central area expanded transversely to less than half the hemivalve, and central nodule between the central raphe ends thickened. Under the LM, only the thickened central nodule highlighted, making the central area more narrow than it really is. Transapical striae parallel in the middle, strongly radiate towards the apices, 26–31 in 10 μm of stria, often 1–2 striae in the middle of one side of the valve particularly short.</p> <p>Remarks: Cocconeis convexa is pantropical, and described from the Pacific and Indian Oceans (Witkowski et al. 2000), Guam in the western Pacific Ocean (Navarro &amp; Lobban 2009), Réunion and Rodrigues in the western Indian Ocean (Riaux-Gobin et al. 2011), and Tahiti and Tuamotu Archipelago of the southern Pacific Ocean (Riaux-Gobin et al. 2015). The species has been reported from the coasts of Japan (Suzuki 2001), Argentina (Sar et al. 2003), Mexico (Siqueiros-Beltrones &amp; Argumedo-Hernández 2015). In South Korea, it was already reported in the coast of Jeju Island (Kim et al. 2017), and in this survey, was found frequently as epiphytes on seaweeds along the Seogwipo coast.</p> </div>	http://treatment.plazi.org/id/D0663914FF8FFFE91B95FA5DFACB95F6	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF8CFFE91B95FEF9FDEF964E.text	D0663914FF8CFFE91B95FEF9FDEF964E.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis costata Gregory	<div><p>6. Cocconeis costata Gregory (Figs 6–8)</p> <p>Basionym: Gregory 1855, p. 39, pl. 4, fig. 10.</p> <p>References: Hustedt 1933, p. 332, fig. 785; Romero &amp; Rivera 1996, p. 321, figs 2–16; Witkowski et al. 2000, p. 104, pl. 38, figs 36–38.</p> <p>Description: Valves elliptical to linear-elliptical, 8–19 μm long, 5–8 μm wide. SV: sternum narrow and linear. Central area not developed. Transapical striae parallel in the middle, radiate towards the apices, biseriate to triseriate, 9–10 in 10 μm, but pluriseriae on a stria unresolvable in LM. RV: raphe straight, the central ends of raphe expanded externally, but slightly deflected in opposite directions internally; sternum very narrow. Central area transversely expanded as hyaline fascia up to the margins. Transapical striae biseriate, parallel in the middle, radiate towards the apices, 14–15 in 10 μm.</p> <p>Remarks: This is ubiquitous or cosmopolitan taxon, occurring on the coasts from the Mediterranean to the northern Arctic Ocean (Hustedt 1933), occurred frequently near Cape Town coast of South Africa (Giffen 1970) and in the Kerguelen Islands of the southern Indian Ocean (Riaux-Gobin 1994), along the Pacific Ocean coasts of Chile, including parts of the Subarctic and Arctic (Romero &amp; Rivera 1996), and in western Baltic Sea (Witkowski et al. 2000). Along the Seogwipo coast of Jeju Island, it was rarely found as epiphytes on seaweeds of some samples; it is herein newly described for South Korea.</p></div> 	http://treatment.plazi.org/id/D0663914FF8CFFE91B95FEF9FDEF964E	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF8CFFE91B95FC61FDDF90AA.text	D0663914FF8CFFE91B95FC61FDDF90AA.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis cyclophora var. decora A. Schmidt	<div><p>7. Cocconeis cyclophora var. decora A. Schmidt (Fig. 64)</p> <p>Basionym: Schmidt et al. 1895, pl. 198, figs 1–3.</p> <p>References: Wu et al. 2012, p. 771, pl. 1, fig. e; Riaux-Gobin et al. 2017, p. 58, figs 19, 52–54.</p> <p>Description: Valves elliptical, 33–40 μm long, 20–22 μm wide. SV: sternum sigmoid and enlarged between the middle and ends of the valve. A large ocellus in the middle on one side of valve. Transapical striae coarse and radiate towards the apices, 22–26 in 10 μm, with 17–18 areolae in 10 μm of stria. Three elliptical hyaline areas lacking areolae on each side of the sternum, the hyaline area in the middle connected to the sternum. No RV observed.</p> <p>Remarks: The variety was reported from the type locality, Yokohama of Japan (Schmidt et al. 1895). It was found in sediments collected from the 1,071m deep bottom surface of the South China Sea (Wu et al. 2012), and in marine benthic materials from Nagasaki of Japan through F. Meister’s collections (Riaux-Gobin et al. 2017). During the survey at Seogwipo coast of Jeju Island, this taxon was encountered twice as epiphytes in small rock pools (St. 2); it is herein newly described for South Korea.</p> </div>	http://treatment.plazi.org/id/D0663914FF8CFFE91B95FC61FDDF90AA	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF8CFFE91B95FA5DFDA2927E.text	D0663914FF8CFFE91B95FA5DFDA2927E.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis cyclophora var. meisteri Riaux-Gobin	<div><p>8. Cocconeis cyclophora var. meisteri Riaux-Gobin (Figs 62, 63)</p> <p>Basionym: Riaux-Gobin et al. 2017, p. 58, figs 55–58.</p> <p>Description: Valves elliptical to linear-elliptical, 22–24 μm long, 12–13 μm wide. SV: sternum broad, slightly sigmoid and enlarged between the center and ends of valve. A large ocellus in the middle on one side of the valve. Transapical striae radiate towards the apices, 24 in 10 μm, with 23 areolae in 10 μm of stria, a few small hyaline areas lacking areolae on each side of the sternum near the margins, a large hyaline area in the middle connected to the sternum. RV: a complete frustule observed with sigmoid raphe.</p> <p>Remarks: This taxon was reported from the type locality, Nagasaki of Japan (Riaux-Gobin et al. 2017).Along the Seogwipo coast of Jeju Island, it was encountered a few times in seaweeds collected from small rock pools; it is herein newly described for South Korea.</p></div> 	http://treatment.plazi.org/id/D0663914FF8CFFE91B95FA5DFDA2927E	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF8CFFE71B95F871FF7494D7.text	D0663914FF8CFFE71B95F871FF7494D7.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis delicata A. Schmidt	<div><p>9. Cocconeis delicata A. Schmidt (Figs 38–41)</p> <p>Basionym: Schmidt et al. 1894b, pl. 196, fig. 24.</p> <p>References: Suzuki et al. 2007, p. 38, figs 15, 16; Riaux-Gobin et al. 2017, p. 52, figs 8, 34–38.</p> <p>Description: Valves elliptical, 21–35 μm long, 14–25 μm wide. SV: sternum elliptical, central area not developed. Transapical striae radiate towards the apices, crossed by hyaline and zigzag longitudinal rows, 18–22 in 10 μm, areolae on a stria transversely elongated, 9–11 in 10 μm. RV: raphe weakly sigmoid, sternum very narrow. Central area transversely hyaline, occupying the short width of the middle field. Transapical striae radiate towards the apices, 18–22, with 16–23 areolae in 10 μm of stria.</p> <p>Remarks: This species was originally identified from Yokohama materials by Schmidt et al. (1894b), but very few examples have been reported since. Meister (1935) and Suzuki et al. (2007) reported this species on the coast of Japan, and Riaux-Gobin et al. (2017) described the species in detail, using materials obtained from Nagasaki, Japan. The species was rarely encountered along the Seogwipo coast of Jeju Island. It is herein newly described for South Korea.</p></div> 	http://treatment.plazi.org/id/D0663914FF8CFFE71B95F871FF7494D7	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF82FFE71B95FDDAFB459061.text	D0663914FF82FFE71B95FDDAFB459061.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis dirupta var. dirupta Gregory	<div><p>10. Cocconeis dirupta var. dirupta Gregory (Figs 27–32, 95)</p> <p>Basionym: Gregory 1857, p. 491(19), pl. IX(1), fig. 25.</p> <p>References: Hustedt 1933, p. 354, figs 809a–c; Kobayasi &amp; Nagumo 1985, p. 99, pl. 2. figs 16–27; Witkowski et al. 2000, p. 105, pl. 39, figs 1–5; Riaux-Gobin et al. 2011, p. 26, pl. 3, figs 9–11, pl. 41, figs 1–6; Lobban et al. 2012, p. 286, pl. 40, figs 1–3; Riaux-Gobin et al. 2016, p. 11, figs 4, 35–38</p> <p>Description: Valves broadly elliptical, 9–23 μm long, 5–14 μm wide. SV: sternum narrow to broadly lanceolate, fusiform, sometimes slightly retracted in the middle. Transapical striae radiate, crossed by hyaline and longitudinal rows, 15–22 in 10 μm, one median stria often shorter on one or both side of the central area. RV: raphe slightly sigmoid. Sternum narrow and straight. Central area not developed or extended as transversely narrrow fascia, not reaching to the margins. Transapical striae radiate, 24–28 in 10 μm.</p> <p>Remarks: The specimens described herein have valve outlines that are more elliptical rather than round-elliptical to discoid, as described for the lectotype designated by Riaux-Gobin et al. (2016). C. dirupta is distinguished from C. dirupta var. flexella by the straight axial area in the SV. In the literature, Cocconeis dirupta corresponds to two forms: one having large valves with a wide sternum (Kobayasi &amp; Nagumo 1985, Riaux-Gobin et al. 2016) and the other having valves with a strong retraction in the middle of the sternum (Witkowski et al. 2000, Lobban et al. 2012). This species has a wide range in length and width dimensions, and both forms were found in the present study. The identifications were conducted according to the large forms designated by Hustedt (1933), and the small retracted forms by Lobban et al. (2012). The retracted forms collected in local areas have smaller dimensions, 9–17 μm long and 5–9 μm wide. In the smaller forms, transapical striae are abruptly denser at apices.</p> <p>This taxon was reportedly common along oceanic coasts (Witkowski et al. 2000), and in tropical coasts (Riaux-Gobin et al. 2011, Lobban et al. 2012). Here, frequent on seaweeds of the Seogwipo coast of South Korea.</p></div> 	http://treatment.plazi.org/id/D0663914FF82FFE71B95FDDAFB459061	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF82FFE71B95FA85FDD992E8.text	D0663914FF82FFE71B95FA85FDD992E8.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis dirupta var. flexella (Janisch & Rabenhorst) Grunow	<div><p>11. Cocconeis dirupta var. flexella (Janisch &amp; Rabenhorst) Grunow (Figs 33–37, 90)</p> <p>Basionym: Janisch &amp; Rabenhorst 1863, p. 7, pl. 1, fig. 11.</p> <p>References: Hustedt 1933, p. 355, figs 809d–i; Witkowski et al. 2000. p. 105, pl. 39, figs 6, 7, pl. 51, figs 3–8; De Stefano &amp; Marino 2001, p. 304; Lobban et al. 2012, p. 287, pl. 40, figs 4, 5; Stidolph et al. 2012, pl. 22, figs 25, 30.</p> <p>Description: Valves broadly elliptical to almost circular, 16–31 μm long and 10–21 μm wide. SV: sternum moderately broad and sigmoid. Central area not developed, or often a short fascia with missing of a stria in either side of valve. Transapical striae radiate towards apices, crossed by hyaline and longitudinal rows, 20–23 in 10 μm. RV: striae slightly sigmoid, sternum very narrow. Central area transversely narrow fascia, not reaching to the margins. Transapical striae radiate, 20–21 in 10 μm.</p> <p>Remarks: The collected variants are distinguished from the nominate variety by the sigmoid sternum of SV (Hustedt 1933). This taxon has been reported from the Mediterranean, some islands of the Pacific and western Indian Oceans (Riaux-Robin et al. 2011, Lobban et al. 2012, Stidolph et al. 2012), Namibia of western Atlantic Ocean (Witkowski et al. 2000), and Mexico (Siqueiros-Beltrones &amp; Romero 2004). This taxon is distributed in warmer coasts and the Mediterranean. Here, it was frequently encountered as epiphytes on seaweeds and the benthic of the sandy bottom of the Seogwipo coast, South Korea.</p></div> 	http://treatment.plazi.org/id/D0663914FF82FFE71B95FA85FDD992E8	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF80FFE51B95FF6DFEBC9150.text	D0663914FF80FFE51B95FF6DFEBC9150.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis diruptoides Hustedt	<div><p>12. Cocconeis cf. diruptoides Hustedt (Figs 25, 26, 91–94)</p> <p>Basionym: Hustedt 1933, p. 356, fig. 810.</p> <p>References: Simonsen 1987, p. 133, pl. 219, figs 5–10, 13, 14; De Stefano &amp; Marino 2001, p. 303, figs 15–27; Car et al. 2012, p. 445, figs S18–21.</p> <p>Description: Valves oblong-elliptical to elliptical, 9–23 μm long and 5–13 μm wide. SV: sternum narrow and slightly sigmoid. Central area forming with lacking one striae, expanding into a short hyaline fascia on the one side of valve. Transapical striae slightly radiate towards apices, 25–37 in 10 μm, areolae on striae transapically elongated, 18–26 in 10 μm, forming wavy longitudinal lines, a few striae bifurcated in the margins of valve. RV: raphe slightly sigmoid, sternum very narrow. Central area as transversely narrow and hyaline fascia, not reaching up to the margins. Transapical striae slightly radiate, 28–35 in 10 μm, with 29–35 areolae in 10 μm of stria. Narrow hyaline area around the margins of valve.</p> <p>Remarks: The local specimens match the description of De Stefano et al. (2000), based on Hustedt’s type specimen, characterized by the presence of hemifascia on SV and strial dichotomy in the margins. However, since the hemifascia is not found in Hustedt’s illustration and the exact type specimens are controversial on the other hand (Riaux-Gobin et al. 2018), the local specimens are recorded as Cocconeis cf. diruptoides.</p> <p>Specimens collected in the current study were often less than 18 μm long; some were as short as 9 μm. The species is similar to Cocconeis dirupta var. flexella in its valve morphology, but the latter is distinguished by a sigmoid raphe and sternum of the valve, a low density of transapical striae (De Stefano &amp; Marino 2001), and sparse strial areolae in the SV.</p> <p>In the present survey, this is one of the most commonly observed Cocconeis. The valves are very variable in size and range from 9 μm to 23 μm long. In the assemblage, individuals commonly exhibited weakly sigmoidal raphe of valves, but widely differed in the density of striae for both valves.</p> <p>This taxon is distributed in the Mediterranean (Hustedt 1933), has been collected from the northern Adriatic Sea between Rovinj and Vis (De Stefano &amp; Mario 2001), and is widely distributed at temperate and warm coasts (Car et al. 2012). Along the Seogwipo coast, it was found frequently as epiphytes on seaweeds; it is herein newly described for South Korea.</p></div> 	http://treatment.plazi.org/id/D0663914FF80FFE51B95FF6DFEBC9150	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF80FFE31B95FB5BFE4B949F.text	D0663914FF80FFE31B95FB5BFE4B949F.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis distans Gregory	<div><p>13. Cocconeis distans Gregory (Figs 12–19)</p> <p>Basionym: Gregory 1855, p. 39, pl. 4, fig. 9 (incorrect); Gregory 1857, p. 490, pl. 9, fig. 23 (correct) (De Stefano et al. 2006).</p> <p>References: Sar et al. 2003, p. 86, figs 16–21, as Cocconeis guttata Hustedt &amp; Aleem; De Stefano et al. 2006, p. 440, figs 1–7, 15–32.</p> <p>Description: Valves elliptical, often rhombic in large forms, 13–31 μm long, 8–23 μm wide. SV: sternum linear, central area not developed. Transapical striae radiate towards the apices, 6–9 in 10 μm, areolae on striae, coarsely round to subquadrangular and included inflated costae around each areola, 5–9 in 10 μm of stria. A row of areolae distinct around the margins of valve, on the other hand, among some large forms, two or three small areoale regularly arranged at the terminal ends of each stria in the valve margins (Fig. 13). RV: raphe straight, sternum narrow. Central area not developed. A narrow, hyaline area in the margin borders between valve and mantle. Transapical striae radiate towards the apices, 15–20 in 10 μm, with 12–19 areolae in 10 μm of stria.</p> <p>Remarks: Cocconeis distans and C. guttata are occasionally confused due to their similar morphology of valves, and until recently, taxonomic confusion still exists. A close examination of the literature describing the two species found that, before comparing the two taxa, there were two morphotypes in the C. distans, small form and very large form in terms of dimensions of valves. As a result of referring to the literature describing small forms (Gregory 1855, Sar et al. 2003, De Stephano et a. 2006, Riaux-Gobin et al. 2011) and large forms (Cleve 1895, Peragallo and Peragallo 1897-1908, Hustedt 1933, Hendey 1964, Riaux-Gobin et al. 2014a), these two morphotypes are clearly distinguished in valve length (18–31: 28–60 μm) and valve width (10–20: 17–40 μm), density of stria (7–11: 4–5 rows in 10 μm), and density of areolae on a stria (4–8: 12–14 in 10 μm of SV). Some morphological differences in length or stria densities may be due to the presence of morphological variations. Genetic analyses will precise if it is the same species or varieties.</p> <p>Meanwhile, Hustedt (1933) described C. granulifera Greville as a synonym for C. distans while describing C. distans, and until recently the two species are still considered as a heterotypic synonym. However, the synonym of C. granulifera seems to correspond to the large C. distans.</p> <p>On the other hand, both large and small form of C. distans are clearly distinguished by the difference in the density of the striae on the valve and areolae on the stria. Local taxonomic identity and dimensions of the species are adopted from three references, Sar et al. (2003), De Stefano et al. (2006), and Riaux-Gobin et al. (2011).</p> <p>This taxon is reported from the Patagonian coast of Argentina (Sar et al. 2003) and is distributed throughout the Mediterranean Sea (De Stefano et al. 2006), and common in coral sediments of Réunion and Rodrigues in the western Indian Ocean (Riaux-Gobin et al. 2011). It occurred infrequently as benthic diatoms in sand bottoms and salt marshes along the Seogwipo coast of Jeju Island. Local assemblages of the species can be divided into two categories, short and long, based on 23 μm in length.</p></div> 	http://treatment.plazi.org/id/D0663914FF80FFE31B95FB5BFE4B949F	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF86FFE31B95FE11FEB5914B.text	D0663914FF86FFE31B95FE11FEB5914B.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis heteroidea Hantzsch 1863	<div><p>14. Cocconeis heteroidea Hantzsch (Figs 77, 78)</p> <p>Basionym: Rabenhorst 1863, p. 21, pl. 6 A, fig. 10.</p> <p>References: Hustedt 1933, p. 256, fig. 811; Suzuki et al. 2001a, p. 131, figs 1–28; Lobban et al. 2012, p. 287, pl. 40, figs 6, 7, pl. 41, figs 1–3.</p> <p>Description: Valves broadly elliptical to almost circular, 36–55 μm long, 30–47 μm wide. SV: sternum broadly linear in outline, but distinctly sigmoid. Transapical striae radiate towards the apices, 30, interrupted by a broad longitudinal furrow, and four longitudinal hyaline lines between sternum and the margins, appearing like some longitudinal folds, areolae in a stria transapically elongated. RV: raphe strongly sigmoid, and sternum narrow. Central area small and circular. Valve deeply buried to apical direction between the raphe and the margins, the apical central parts looking prominent in the sigmoid ridge. Transapical striae radiate towards the apices, 23 in 10 μm.</p> <p>Remarks: This taxon is common in the Mediterranean Sea (Hustedt 1933, Witkowski et al. 2000, Majewska et al. 2013), and was reported for the East Sea of Russia (Orlova et al. 2009) as well as for islands of the Pacific Ocean, Bahamas, and Caribbean Sea (Lobban et al. 2012). It is widely distributed along warmer coasts. In South Korea, it was recorded as plankton off the coast of Jeju Island (Lee et al. 1990), as epiphytes on Zostera in the coast of Geoje Island (Chung &amp; Lee 2008), and in this survey, occurred rarely as epiphytes on seaweeds from small rock pools in Seogwipo coast (St. 2).</p> </div>	http://treatment.plazi.org/id/D0663914FF86FFE31B95FE11FEB5914B	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF86FFE31B95FB7DFAC29226.text	D0663914FF86FFE31B95FB7DFAC29226.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis pellucida (Hantzsch) Grunow 1863	<div><p>15. Cocconeis pellucida Grunow (Figs 84–86)</p> <p>Basionym: Rabenhorst 1863, p. 21, pl. 6, fig. 11.</p> <p>References: Hustedt 1933, p. 357, fig. 812; Kobayasi &amp; Nagumo 1985, p. 102, pl. 3, figs 28–40; Witkowski et al. 2000, p. 111, pl. 34, figs 1–3.</p> <p>Description: Valves broadly elliptical to almost orbicular, 47–104 μm long, 40–95 μm wide. SV: sternum broadly linear and widened in the middle. Central area not developed. Transapical striae radiate towards the apices, 30–34 in 10 μm, but regularly interrupted by several longitudinal hyaline lines appearing to form many longitudinal folds, areolae in a stria transapically elongated. RV: both raphe and sternum slightly sigmoid, sternum narrow, the terminal ends of sternum expanded to crescent hyaline area and distant from the apices. Central area small and rhombic. Valves between the raphe and the margins slightly depressed. Transapical striae radiate, 18–24 in 10 μm.</p> <p>Remarks: This species is common in warmer oceans and in the Mediterranean, and has rarely been reported from Europe (Hustedt 1933, Witkowski et al. 2000). It occurred in the coasts of Japan (Takano 1962, Kobayasi &amp; Nagumo 1985), South Africa (Giffen 1970), Brazil (Procopiak et al. 2006), the New Hebrides (now Vanuatu) (Stidolph et al. 2012), and Mexico (López-Fuerte &amp; Siqueiros-Beltrones 2016). In South Korea, this taxon was reported as pelagic planktons from Korea Strait (Skvortzow 1932), as plankton and periphytes off the coast of Jeju Island (Lee et al. 1990, 1991), and in this survey, occurred rarely as epiphytes on seaweeds collected from St. 2 in the Seogwipo coast.</p></div> 	http://treatment.plazi.org/id/D0663914FF86FFE31B95FB7DFAC29226	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF86FFE21B95F8C9FDC5976E.text	D0663914FF86FFE21B95F8C9FDC5976E.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis pelta A. Schmidt	<div><p>16. Cocconeis pelta A. Schmidt (Figs 20, 21)</p> <p>Basionym: Schmidt 1874, p. 93, pl. 3, fig. 17.</p> <p>References: Hustedt 1933, p. 361, fig. 815; Witkowski et al. 2000, p. 111, pl. 41, figs 7–10; Sar et al. 2003, p. 91, fig. 33.</p> <p>Description: Valves elliptical, 15–16 μm long, 11–12 μm wide. SV: sternum slightly very broadly lanceolate to elliptical, depressed making a distinct marginal rim, irregularly punctate. Central area not developed. Transapical striae developed in the margins, radiate towards the apices, 17–18 in 10 μm. RV: raphe straight, sternum broadly elliptical like the SV. Transapical striae in the margins radiate towards the apices.</p> <p>Remarks: The local specimens are smaller than the dimensions reported in referred literatures. Though the fine morphology of the three taxa seen with SEM differs, Cocconeis pelta is similar to C. peltoides Hustedt and C. fluminensis H. Peragallo &amp; M. Peragallo in the morphology of SV under LM. Commonly, the three species have longitudinal costae in the median area of the SV, but the first species is distinguished from the second and the third taxon in that there is no striae in the inside of the longitudinal costae (Sar et al. 2003). The first species has a similar stria density with the second, while it is distinguished from the higher density than the third.</p> <p>This species has been reported from the western Baltic Sea (Witkowski et al. 2000), European coasts in the North Atlantic and the Patagonian coasts of Argentina (Sar et al. 2003). In South Korea, this taxon was reported firstly as the epipsammic from the Nakdong River estuary (Joh 2012), and in this survey, very rare in small rock pools (St. 2) and salt marshes (St. 4) of the Seogwipo coast.</p></div> 	http://treatment.plazi.org/id/D0663914FF86FFE21B95F8C9FDC5976E	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF87FFE21B95FD81FEBC903E.text	D0663914FF87FFE21B95FD81FEBC903E.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis pinnata Greville	<div><p>17. Cocconeis cf. pinnata W. Gregory ex Greville (Fig. 22)</p> <p>Basionym: Greville 1859, p. 79, pl. 6, fig. 1.</p> <p>References: Hustedt 1933, p. 330, fig. 783; Witkowski et al. 2000, p. 112, pl. 37, figs 14, pl. 39, fig. 10; Riaux-Gobin et al. 2014c, p. 85, figs 7–43.</p> <p>Description: Valve elliptical to ovoid, 28–31 μm long, 20–21 μm wide. SV: sternum broadly lanceolate, central area not differentiated. Transapical striae robust, raised, biseriate, but uniseriate towards the inner, and radiate towards the apices, 3–4 in 10 μm. Marginal area of valve lacking areolae to make a hyaline band. No RV observed.</p> <p>Remarks: Striae on valves are biseriate with large puncta, but uniseriate towards the margins of valve. These characteristics of striae are consistent with those of Hustedt (1933) and Witkowski et al. (2000), but the width of sternum of SV is different each other. However, according to the inspection of the type specimens, the striae are uniseraite on valve and biseriate towards the margins (Riaux-Gobin et al. 2014c). For this reason, this taxon collected in the local area is named C. cf. pinnata.</p> <p>This species is distributed along the coasts of Europe, from the Mediterranean to the northern Arctic (Hustedt 1933); it has also been reported for the west Iberian coast of North Portugal (Resende et al. 2007), King George Island, Antarctica (Al-Handal &amp; Wulff 2008), and elsewhere, in the Mediterranean (Majewska et al. 2013). In the Seogwipo coast, it occurred very rarely as epiphytes on seaweed from small rock pools (St. 2); it is herein newly described for South Korea.</p></div> 	http://treatment.plazi.org/id/D0663914FF87FFE21B95FD81FEBC903E	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF87FFFE1B95FAB1FDB79446.text	D0663914FF87FFFE1B95FAB1FDB79446.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis pseudomarginata Gregory	<div><p>18. Cocconeis pseudomarginata Gregory (Figs 69–72)</p> <p>Basionym: Gregory 1857, p. 492, pl. 9, fig. 27.</p> <p>References: Hustedt 1933, p. 359, figs 813a–c; Romero &amp; Navarro 1999, figs 1–6, 13–15, 20–31; Riaux-Gobin et al. 2014a, p. 176, f, 33, 34.</p> <p>Description: Valves broadly elliptical to ovoid, 19–54 μm long, 10–41 μm wide. SV: sternum wide lanceolate, the terminal ends of sternum enlarged and pear-shaped, extending to submarginal hyaline line, and a longitudinal row of areolae between sternum and the submarginal hyaline lines. Transapical striae in inner parts of valve radiate towards the apices, 22–29 in 10 μm, areolae on a stria transapically elongated. RV: raphe straight and linear, sternum very narrow, crescent-shaped hyaline area at the terminal ends of sternum, resulting the ends of raphe distant from the apices. Central area small lanceolate or circular. The valve depressed between the raphe and valve margins. Transapical striae radiate towards the apices, 21–30 in 10 μm in the inner parts of valve.</p> <p>Remarks: This species is similar to Cocconeis multiperforata De Stefano, Mario &amp; Mazzella and the two may be confused in the image of light microscopy. However, the comprehensive comparison of relevant reports and data of SEM (Romero &amp; Navarro 1999, De Stefano et al. 2000, Mori et al. 2002, Riaux-Gobin et al. 2014a) allowed to identify the following differences: the former has uniseriate striae in the SV, a crescent shape of the hyaline area at the terminal ends of the raphe, and more than 22 of striae in the SV, while these parameters of the latter are biseriate, pear-shaped, and less than 20, respectively.</p> <p>This taxon is widespread along marine coasts worldwide (Hustedt 1933); it has been collected in many places, ranging from Puerto Rico to Scotland (Romero &amp; Navarro 1999). It was reported near Cape Town of South Africa (Giffen 1970), in the southeastern Pacific Ocean and the Caribbean Sea (Romero &amp; Navarro 1999), common in Kattegat of Baltic Sea (Witkowski et al. 2000), and in Japan (Mori et al. 2002). In South Korea, this species was reported as planktons and periphytes off the coast of Jeju Island (Lee et al. 1990, 1991), and in this survey, occurred infrequently as epiphytes in the Seogwipo coast.</p></div> 	http://treatment.plazi.org/id/D0663914FF87FFFE1B95FAB1FDB79446	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF9BFFFE1B95FE69FBB59132.text	D0663914FF9BFFFE1B95FE69FBB59132.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis pseudomarginata var. intermedia Grunow	<div><p>19. Cocconeis pseudomarginata var. intermedia Grunow (Figs 73–76, 88, 89)</p> <p>Basionym: Grunow 1867, p. 13, pl. 1, fig. 6.</p> <p>References: Suzuki et al. 2001c, p. 94, figs 1–26; Suzuki et al. 2008, p. 277.</p> <p>Description: Valves elliptical, 26–68 μm long, 14–51 μm wide. SV: sternum broadly lanceolate, the ends of sternum enlarged and pear-shaped, connected to the submarginal hyaline area, a longitudinal line bisecting striae between sternum and valve margins. The outer surface of sternum longitudinally depressed. Transapical striae radiate towards the apices, 25–30 in 10 μm, striae composed of elongated areolae. RV: raphe weakly sigmoid, sternum very narrow, the terminal ends of the sternum expanded with a crescent-shaped hyaline area, resulting the raphe distant from the apices. Longitudinal depression between the raphe and valve margins. Central area small rhombic. Transapical striae radiate towards the apices, 23–28 in 10 μm in the inner parts of valve.</p> <p>Remarks: This taxon differs from the nominate variety, Cocconeis pseudomarginata, in that the raphe is slightly sigmoid and transapical striae of SV are dense.</p> <p>The distribution area of the species is quite limited, compared with the nominate variety, but prefer warmer marine coasts in view of localities, Cape of Good Hope, Nicobar Islands, Luzon, Manilla, and Tahiti (Fourtanier &amp; Kociolek 2011). More recently, it has frequently been found in Japan (Suzuki et al. 2001c). In the present study, it was frequently encountered as epiphytes on seaweeds along the Seogwipo coast of South Korea.</p></div> 	http://treatment.plazi.org/id/D0663914FF9BFFFE1B95FE69FBB59132	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF98FFFD1B95FC45FD679252.text	D0663914FF98FFFD1B95FC45FD679252.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis shikinensis Suzuki	<div><p>22. Cocconeis shikinensis Suzuki (Figs 49–52, 96–98)</p> <p>Basionym: Suzuki et al. 2001b, p. 138, figs 1–31.</p> <p>Description: Valves elliptical, 19–50 μm long, 12–36 μm wide, the valve surface overall convex, but two-thirds of inner parts on valve face slightly concave. SV: sternum narrow and linear. Central area not developed, but very small circular in large specimens. Transapical striae transversely elongated, radiate towards the apices, 13–17 in 10 μm, crossed by several hyaline and zigzag longitudinal lines, elongated areolae in striae, alveolus, with 8–10 in 10 μm of stria. In some valves, often areolae arranged sparsely in the submarginal area. At the marginal area of the valve, one short striae arranged every 1–3 transapical striae, so the striae at the margins more dense than the middle.</p> <p>RV: raphe straight. Sternum narrow, but the terminal ends of the sternum expanded with crescent-shaped hyaline area, resulting the raphe ends distant from the apices. Central area small and circular. Transapical striae radiate, 14–21 in 10 μm, areolae in striae circular-shaped, with 16–20 areolae in 10 μm of stria. Valve face between raphe and valve margins depressed concentrically.</p> <p>Remarks: This species is similar to Cocconeis schmidtii Heiden in its valve morphology, but differs in having a crescent hyaline area on the terminal ends of the RV, in lacking a round central hyaline area, and in having a lower density of areolae on both valves (Suzuki et al. 2001b). It was reported as important epiphytes on Caulerpa sp. (Chlorophyta) in Japan (Suzuki 2001b). In the present study, it was mainly found in Rhodophyta, such as Plocamium sp. This species has morphological features that may cause confusion with C. placentula Ehrenberg and its allied taxa. The RV is not so, but the SV is similar to that of C. placentula; thus, judging by the SV alone can be misleading. Prior to the naming of this species, the taxon attached to a carapace in Japan was recorded as C. placentula (Takano 1962). The two species, Cocconeis shikinensis and C. placentula, are sometimes found in the marine coasts. In the present study, the valve length of C. shikinensis ranges from 19 μm to 50 μm, while that of C. placentula does from 11 μm to 36 μm (Lange-Bertalot et al. 2017).</p> <p>Previously, these taxa had been reported strictly from Japanese coasts, including the type locality, Izu Islands of Tokyo (Suzuki et al. 2001b, 2007). This taxon was encountered infrequently as epiphytes on seaweeds of the Seogwipo coast; it is herein newly described for South Korea.</p></div> 	http://treatment.plazi.org/id/D0663914FF98FFFD1B95FC45FD679252	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF9FFFFA1B95FF6DFC6D97D3.text	D0663914FF9FFFFA1B95FF6DFC6D97D3.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis stauroneiformis (Rabenhorst) Okuno	<div><p>23. Cocconeis stauroneiformis (Rabenhorst) Okuno (Figs 3–5, 103, 104)</p> <p>Basionym: Rabenhorst 1864, p. 101.</p> <p>References: Romero 1996, p. 371, figs 25–54; De Stefano et al. 2000, p. 237, figs 87–92; Witkowski et al. 2000, p. 116, pl. 36, figs 8, 9, pl. 54, figs 1–3; Sar et al. 2003, p. 95, figs 51–57.</p> <p>Description: Valves elliptic-lanceolate to elliptical, 15–20 μm long, 8–12 μm wide. SV: sternum moderately linear to lanceolate, and central area not developed. Transapical striae broad, uniseriate, slightly radiate towards the apices, 8–11 in 10 μm, with 15–16 areolae in 10 μm of stria. RV: raphe straight, the central ends of raphe close each other, and sternum narrow. Central area transversely expanded into a hyaline fascia, up to the margins. Transapical striae slightly radiate towards the apices, 11 in 10 μm, with 16–17 areolae in 10 μm of stria. A hyaline rim in the submarginal area of valve.</p> <p>Remarks: As epiphytic and benthic diatoms, Cocconeis stauroneiformis is distributed widely from the Pacific Ocean to the Antarctica (Romero 1996), and cosmopolitan from marine to brackish waters (Witkowski et al. 2000). It occurred in Gulf of Naples of Italy (De Stefano et al. 2000), and in Patagonian coast of Argentina (Sar et al. 2003). In South Korea, this taxon was reported firstly as the epipsammic from the Nakdong River estuary (Joh 2012), and in this survey, infrequent as the epiphytes on seaweeds along the Seogwipo coast.</p> </div>	http://treatment.plazi.org/id/D0663914FF9FFFFA1B95FF6DFC6D97D3	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF9FFFFA1B95FCD5FEE491DB.text	D0663914FF9FFFFA1B95FCD5FEE491DB.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis suzukii Riaux-Gobin, Compere, Coste, Straub & Taxbock	<div><p>24. Cocconeis suzukii Riaux-Gobin, Compère, Coste, Straub &amp; Taxböck (Figs 57–61, 99)</p> <p>Basionym: Riaux-Gobin et al. 2014b, p. 213, figs 24–28.</p> <p>Description: Valves elliptical, 13–20 μm long, 9–11 μm wide. SV: sternum large, elliptical and slightly sigmoid, not constricted in the middle. Transapical striae delicate and radiate towards the apices, 29–32 in 10 μm, but interrupted by a hyaline longitudinal line, one stria shorter in the middle of one side of valve. RV: both raphe and sternum sigmoid, sternum very narrow, the central ends of raphe close each other, but the terminal ends of raphe relatively far from the apices. Central area not developed. Transapical striae radiate towards the apices, 24–28 in 10 μm.</p> <p>Remarks: This species was designated from F. Meister’s slide specimens, collected from Nagasaki of Japan (Riaux-Gobin et al. 2014b). It does not appear to have been reported anywhere other than Nagasaki. Along Seogwipo coast, the species was encountered less frequently as epiphyte from small rock pools (St. 2); it is herein newly described for South Korea.</p></div> 	http://treatment.plazi.org/id/D0663914FF9FFFFA1B95FCD5FEE491DB	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
D0663914FF9FFFFA1B95FAEDFE549253.text	D0663914FF9FFFFA1B95FAEDFE549253.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Cocconeis voigtii Meister 1937	<div><p>25. Cocconeis voigtii Meister 1937 (Figs 65–68)</p> <p>Basionym: Meister 1937, p. 266, pl. 10, fig. 5.</p> <p>Reference: Riaux-Gobin et al. 2017, p. 46, figs 1, 24–29.</p> <p>Description: Valves elliptical, 32–58 μm long, 24–45 μm wide. SV: sternum broadly lanceolate, the terminal ends of the sternum slightly large and formed as a pear-shaped hyaline area, and connected to the submarginal hyaline band. Transapical striae slightly radiate towards the apices, 17–21 in 10 μm, crossed by 2–3 longitudinal hyaline lines, outer striae between the sternum and submarginal hyaline band crossed by narrow and wavy longitudinal lines. RV: raphe weakly sigmoid, sternum very narrow and connected to crescent-shaped hyaline area in the apices, the ends of raphe distant from the apices. Central area small and rhombic. A longitudinally depressed area between the raphe and valve margins forming clear submaginal rims. Transapical striae distinctly punctate and radiate towards the apices, striae of inner parts 19–25, with 18–20 areolae in 10 μm of stria.</p> <p>Remarks: The original description of this taxon was emended by Riaux-Gobin et al. (2017), adding the description of its RV. Previously, the species appears to only have been found at the type locality of Nagasaki, Japan. Along the Seogwipo coast of Jeju Island, it was encountered infrequently as epiphyte from a small rock pool (St. 2), and is herein newly reported for South Korea.</p></div> 	http://treatment.plazi.org/id/D0663914FF9FFFFA1B95FAEDFE549253	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Joh, Gyeongje	Joh, Gyeongje (2021): Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea. Phytotaxa 528 (3): 149-179, DOI: 10.11646/phytotaxa.528.3.1
