taxonID	type	description	language	source
34236038392332F24740E9C889FB4360.taxon	materials_examined	Non-type material examined. Andaman Sea: 3 specimens, Phang-nga province, Takua Thung district, Na Tai beach, 16. V. 2015, A. Pochai (BUU 16. CH. CM 01 - 03). 2 specimens, Phuket province, Mueang Phuket district, Ao Yon beach, 15. VII. 2015, A. Pochai (BUU 16. CH. CM 04 - 05). 1 specimen, Phuket province, Mueang Phuket district, Panwa beach, 16. VII. 2015, S. Khachonpisitsak (BUU 16. CH. CM 06). 3 specimens, Phuket province, Katu district, Kalim beach, 15. VII. 2015, A. Pochai (BUU 16. CH. CM 07 - 09). Gulf of Thailand: 2 specimens, Chon Buri province, Ko Si Chang district, Ko Kham Yai beach, 05. VII. 2015, S. Khachonpisitsak (BUU 16. CH. CM 10 - 11).	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
34236038392332F24740E9C889FB4360.taxon	description	Description. Peduncle absent; body length 3 - 10 mm; base membranous. Shell elongated oval / shield-shaped, shell white to grey with 6 plates (1 carina, 2 carinal latus, 2 latus and 1 rostrum), carina bigger than rostrum, parietes symmetrical, calcareous and solid, radii solid, inner surface of parietes smooth and white-grey to pale-violet; orifice kite-shaped. Operculum plates symmetrical, articulation of opercular valves deep, scutum and tergum separable. Tergum smaller than scutum, tergum higher than wide, tergum with 4 distinct crests for lateral depressor muscles. Scutum elongated and triangular, adductor pit deep. Mandible with 4 teeth, lower margin pectinated, three large setae at the edge; cirri I with conical spines; cirri II with multi-cuspidate setae and basal guard.	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
34236038392332F24740E9C889FB4360.taxon	distribution	Distribution. Chthamalus malayensis is widely distributed in the Indo-West Pacific region. It has been previously recorded in Taiwan, Thailand, China, Philippines, Vietnam, Malaysia, India and Australia (Jones 2004; Tsang et al. 2008; Tsang et al. 2012). From the previous observation, Chthamalus malayensis presented in both the Andaman Sea (Phuket) and the Gulf of Thailand (Si Chang and Samui Islands) (Tsang et al. 2012). In this study, Chthamalus malayensis were also found in both coastlines: the Andaman Sea (Na Tai, Kalim, Ao Yon, Panwa) and the Gulf of Thailand (Ko Kham Yai) (Table 2).	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
83B744A9DF4237D575EB443098440757.taxon	materials_examined	Non-type material examined. Gulf of Thailand: 2 specimens, Chon Buri province, Mueang Chon Buri district, Khao Sam Muk beach, 05. VII. 2016, W. Sukparangsi (BUU 16. CM. ED 01 - 02).	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
83B744A9DF4237D575EB443098440757.taxon	description	Description. Peduncle absent; body length 3 - 10 mm; base membranous. Shell light brown-yellowish brown with 6 plates (1 carina, 2 carinal latus, 2 latus and 1 rostrum), shell flatted and thin-walled; parietes symmetrical and solid, external surface of shell without ribbed, inner surface of parietes smooth and light brown and white with small horizontal striations around aperture, parietes separable, suture distinct and easily parted; orifice rhomboidal. Opercular plates symmetrical, tergum smaller than scutum, scutum and tergum separable jointing between tergum and scutum with slightly sinous. Scutum triangular with slightly curved basal margin, external surface with shallow and horizontal striations from occludent margin to tergal margin, occludent margin of scutum without teeth, tergal margin slightly sinous from interior view; tergum with 2 - 3 lateral depressor crests. Mandible with 3 teeth, lower margin pectinated with 8 setae, three large setae at the edge; labrum with obvious teeth; caudal appendage absent.	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
83B744A9DF4237D575EB443098440757.taxon	distribution	Distribution. In previous records, Euraphia depressa was found to inhabit along Mediteranean localities, including Spain (Punta Carnero, Punta de la Chullera, Malago, Salobrena and Calpe), France (Cap Bear, La Couronne, and Cassis), Italy (Pegli and Lido), Greece (Amnisso), the Black Sea and Suez canal (Utinomi 1959; Southward 1964; Achituv and Safriel 1980; Crisp 1981). In this study, the presence of Euraphia depressa in Khao Sam Muk station (Chon Buri) in Thailand was unexpected as it was previously unrecorded along Thailand's coastal areas. They were found along rocky shores exposed to heavy wave action inhabiting sheltered crevices of the rocky platform and high shore. The abundance of Euraphia depressa is much less than that of the cosmopolitan barnacle Amphibalanus amphitrite in the same area of observation.	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
18D5A3C8DA2027655A625BC430374982.taxon	materials_examined	Non-type material examined. Andaman Sea: 2 specimens, Phang-nga province, Takua Thung district, Na Tai beach, 16. V. 2015, A. Pochai (BUU 16. CH. EH 01 - 02).	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
18D5A3C8DA2027655A625BC430374982.taxon	description	Description. Peduncle absent; base membranous; body length larger than Chthamalus and range from 10 - 30 mm. Shell brownish grey with 6 plates (1 carina, 2 carinal latus, 2 latus and 1 rostrum), carina bigger than rostrum, carinal latus bigger than latus. External surface of shell irregularly ribbed around basal margin, inner surface of parietes smooth and white with dark brown and pale violet horizontal striations around aperture. Parietes symmetrical, calcareous and solid, parietes separable, sutures coarsely serrate or with interlocking toothed structure. Orifice rhomboidal. Operculum plates symmetrical, tergum smaller than scutum, tergum and scutum separable. Scutum triangular, occludent margin of scutum with strong teeth. Tergum strongly marked with 10 - 12 lateral depressor crests, scutal margin strongly articulated.	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
18D5A3C8DA2027655A625BC430374982.taxon	distribution	Distribution. Barnacles in the genus Euraphia were recorded in several regions including West Africa, the Mediterranean, Hawaii and Southern Japan (Newman and Ross 1976). Euraphia hembeli was previously recorded in California around San Diego (Barrett and Freeman 2016). In this study, we report the presence of Euraphia hembeli distributing along low and middle shore of the intertidal zone, which was only found at Na Tai station, the Andaman Sea (Table 2 and 3). In addition, this is the first report of its presence in Thailand.	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
2B18F37B092D1CF73A11DBDED0A82E4B.taxon	materials_examined	Non-type material examined. Andaman Sea: 4 specimens, Phang-nga province, Takua Thung district, Na Tai beach, 16. V. 2015, A. Pochai (BUU 16. TC. NS 01 - 04).	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
2B18F37B092D1CF73A11DBDED0A82E4B.taxon	description	Description. Peduncle absent; base calcareous. Shell greyish green, shell with 4 plates (1 carina, 2 latus, 1 rostrum); parietes low conical, 3 - 4 rows of irregular parietal tubes (parietes multiple tubiferous), radii board with horizontal striation and summit oblique. External surface with deep longitudinal / radiating lines from base to apex, internal surface of parietes smooth and white with greyish green striations close to operculum. Orifice pentagonal, diamond-shaped. External surface of operculum brownish grey, internal surface of operculum white. Scutum triangular, external surface of scutum with horizontal striations; tergum high and narrow, tergum with numerous depressor crests.	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
2B18F37B092D1CF73A11DBDED0A82E4B.taxon	distribution	Distribution. Newmanella spinosus was previously recorded from low intertidal to subtidal levels on rock shores along the coastlines of Taiwan and the Philippines and they were also collected from the surfaces of buoys used in fishing cages in the open sea (Chan and Cheang 2016). In this present study, Newmanella spinosus specifically distributes along low shores, and the intertidal zones of Na Tai beach, Takua Thung District, Phang-nga (the Andaman Sea).	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
A69C6E12E383783A1A36C2E490840EE2.taxon	materials_examined	Non-type material examined. Andaman Sea: 2 specimens, Phang-nga province, Khura Buri district, Ao Khoei beach, 30. VII. 2015, A. Pochai (BUU 16. TC. TK 01 - 02). 3 specimens, Phang-nga province, Takua Thung district, Na Tai beach, 16. V. 2015, A. Pochai (BUU 16. TC. TK 03 - 05). 2 specimens, Phuket province, Mueang Phuket district, Ao Yon beach, 15. VII. 2015, A. Pochai (BUU 16. TC. TK 06 - 07). 3 specimens, Phuket province, Katu district, Kalim beach, 15. VII. 2015, A. Pochai (BUU 16. TC. TK 08 - 10). Gulf of Thailand: 3 specimens, Prachuap Khiri Khan province, Bang Saphan district, Ban Krut beach, 06. IX. 2015, A. Pochai (BUU 16. TC. TK 11 - 13). 3 specimens, Chon Buri province, Ko Si Chang district, Ko Kham Yai beach, 05. VII. 2015, S. Khachonpisitsak (BUU 16. TC. TK 14 - 16).	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
A69C6E12E383783A1A36C2E490840EE2.taxon	description	Description. Peduncle absent; base membranous; shell greyish black to purplish-grey with 4 plates (1 carina, 2 latus, 1 rostrum), parietes conical, plates inseparable, 7 - 8 rows of parietal tubes (parietes multiple tubiferous), external surface with mosaic scales pattern radiating randomly from base to apex, internal surface of parietes smooth and white with dark grey striations around aperture. External surface of operculum mixed grey and yellowish-light brown, internal surface of operculum greyish-dusky green. Scutum bigger than tergum, scutum triangular, external surface of scutum with horizontal striations, occludent margin of scutum with obvious shallow and rough teeth, short articular ridge-basal margin, angle between basal margin and tergal margin is quite perpendicular. Tergum higher than wide, basi-scutal angle 158 °, tergum with broad spur, spur angle 30 °. Mandible with 4 big teeth, 1 st tooth smaller; maxillule not notched with 11 setae; labrum with 5 small teeth on each side; cirri I possessing serrulate setae.	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
A69C6E12E383783A1A36C2E490840EE2.taxon	distribution	Distribution. Tetraclita kuroshioensis is reassigned the name from Tetraclita squamosa which were collected from Taiwan, and Okinawa and Honsu of Japan, and Tetraclita pacifica. The distribution of this species occurs in broad area along north-west Pacific region (Chan et al. 2007 a, b; Chan 2009). In this present study, the species distribution occurs along littoral intertidal zones in both the Andaman Sea (Ao Yon, Ao Khoei, Na Tai, and Kalim) and the Gulf of Thailand (Ban Krut and Ko Kham Yai).	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
75BEAA6B85D52F90CC2A095FA45567B8.taxon	materials_examined	Non-type material examined. Andaman Sea: 2 specimens, Phang-nga province, Takua Thung district, Na Tai beach, 16. V. 2015, A. Pochai (BUU 16. TS. TSG 01 - 02).	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
75BEAA6B85D52F90CC2A095FA45567B8.taxon	description	Description. Peduncle absent; base membranous; shell purplish-dusky green with 4 plates (1 carina, 2 latus, 1 rostrum), parietes conical, plates inseparable, 5 - 6 rows of parietal tubes (parietes multiple tubiferous), external surface with deep and irregular longitudinal striations from apex to base and small radiating lines, internal surface of parietes smooth and white with greyish-green horizontal striations around aperture. External surface of operculum yellowish brown mixed with dusky green, internal surface of operculum dusky green-purplish and white around spur of the tergum. Scutum bigger than tergum, scutum triangular, short articular ridge-basal margin, external surface of scutum with horizontal striations, occludent margin of scutum with rough teeth. Tergum higher than wide, tergum with broad spur and not beaked, spur angle 30 - 35 °, basi-scutal margin 148 - 150 °. Mandible with 4 big teeth, 2 nd and 3 rd teeth consisting double teeth, 1 st tooth with small spines, lower margin pectinate with 8 small teeth and obvious double bigger teeth at the edge; maxillule notched, two large setae above notch, 13 - 17 setae below notch; labrum with 4 - 5 large teeth on each side; cirri I possessing bidenate serrulate setae.	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
75BEAA6B85D52F90CC2A095FA45567B8.taxon	distribution	Distribution. Tetracliata singaporensis has been reassigned the name from previously known as Tetraclita squamosa, which were collected from Singapore. Hence, the distribution of this species is firstly marked at Singapore, Indo-West Pacific region (Chan et al. 2007 a). In this present work, the specimens were collected from Na Tai, Andaman Sea and it distributes in the mid shore.	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
1530AAF19A334CBE79CBC6CBFD96AFA9.taxon	materials_examined	Non-type material examined. Gulf of Thailand: 2 specimens, Nakhon Si Thammarat province, Sichon district, Hin Ngam beach, 04. VII. 2015, A. Pochai (BUU 16. TC. TSS 01 - 02).	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
1530AAF19A334CBE79CBC6CBFD96AFA9.taxon	description	Description. Peduncle absent; base membranous; shell green mixed with brownish grey, shell with 4 plates (1 carina, 2 latus, 1 rostrum); parietes conical, plate fused, inseparable, 8 rows of parietal tubes (parietes multiple tubiferous), external surface with longitudinal lines from base to apex, internal surface of parietes smooth and white with purplish grey striations close to aperture, External surface of operculum brownish grey, internal surface of operculum purplish grey. Scutum larger than tergum, scutum triangular, long articular ridge-basal margin, external surface of scutum with horizontal striations, occludent margin of scutum with very shallow teeth; tergum higher than wide, basi-scutal margin 158 - 160 °, tergum apex obviously beaked, tergum with spur long and sharp, spur angle 25 °. Mandible with 4 big teeth, 1 st tooth with three small spines, lower margin pectinate; maxillule notched, two large setae above notch, 11 big setae below notch and some smaller setae at the edge; labrum with 4 large teeth on each side; cirri I possessing bidenate serrulate setae.	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
1530AAF19A334CBE79CBC6CBFD96AFA9.taxon	distribution	Distribution. Tetraclita squamosa is widespread in tropical and subtropical waters from West Africa, the Indo-Pacific, the Indian Ocean, Australia, Indonesia and Singapore (Newman and Ross 1976; Ren and Liu 1979; Jones et al. 2000; Chan et al. 2007 b). Its distributions in Thailand were previously recorded in two places: the Andaman Islands and the Gulf of Siam (recently called the Gulf of Thailand) (Jones 2000). In this present study, Tetraclita squamosa has restricted areas of distribution and it was found specifically at Hin Ngam beach, the Gulf of Thailand coast. Regarding vertical zonation, Tetraclita squamosa found in Thailand occurs on the mid shore.	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
D47FA3897DA84F6CBEE20EB6DF27D918.taxon	materials_examined	Non-type material examined. Andaman Sea: 2 specimens, Phang-nga province, Khura Buri district, Ao Khoei beach, 30. VII. 2015, A. Pochai (BUU 16. BN. AA 01 - 02). 4 specimens, Phang-nga province, Takua Thung district, Na Tai beach, 16. V. 2015, A. Pochai (BUU 16. BN. AA 03 - 06). 4 specimens, Phuket province, Mueang Phuket district, Ao Yon beach, 15. VII. 2015, A. Pochai (BUU 16. BN. AA 07 - 10). 3 specimens, Phuket province, Mueang Phuket district, Panwa beach, 16. VII. 2015, S. Khachonpisitsak (BUU 16. BN. AA 11 - 13). 4 specimens, Phuket province, Katu district, Kalim beach, 15. VII. 2015, A. Pochai (BUU 16. BN. AA 14 - 17). Gulf of Thailand: 2 specimens, Nakhon Si Thammarat province, Sichon district, Hin Ngam beach, 09. VIII. 2015, A. Pochai (BUU 16. BN. AA 18 - 19). 4 specimens, Prachuap Khiri Khan province, Bang Saphan district, Ban Krut beach, 06. IX. 2015, A. Pochai (BUU 16. BN. AA 20 - 23). 2 specimens, Chon Buri province, Ko Si Chang district, Ko Kham Yai beach, 05. VII. 2015, S. Khachonpisitsak (BUU 16. BN. AA 24 - 25). 4 specimens, Chon Buri province, Si Racha district, Si Racha beach, 04. VII. 2015, A. Pochai (BUU 16. BN. AA 26 - 29). 3 specimens, Chon Buri province, Mueang Chon Buri district, Khao Sam Muk beach, 05. VII. 2015, A. Pochai (BUU 16. BN. AA 30 - 32).	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
D47FA3897DA84F6CBEE20EB6DF27D918.taxon	description	Description. Peduncle absent; base calcareous. Shell white-pale pink with 6 plates (1 carina, 2 carinal latus, 2 latus, 1 rostrum); single rows of parietal tubes (parietes single tubiferous) with transverse septa; radii solid. External surface with purple longitudinal striations from apex to base (3 - 4 lines per plate) without horizontal striation, transverse teeth on suture edges with denticles on lower regions, internal surface of parietes grey with black horizontal striations close to operculum. External surface of operculum brownish grey, internal surface of operculum grey-white. Scutum bigger than tergum, scutum triangular, external surface of scutum with curved striations; tergum spur board with growth lines.	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
D47FA3897DA84F6CBEE20EB6DF27D918.taxon	distribution	Distribution. Amphibalanus amphitrite is a common fouling barnacle and cosmopolitan species distributed along intertidal zones of coastlines in both the Gulf of Thailand and the Andaman Sea. It was found in all stations examined. The settlement patterns are various (e. g. rocks, shells of oyster and green mussels, concrete walls of bridges and harbors, offshore vessels, dock pilling, and mooring robes). In previous records, this species distributes worldwide in both tropical and temperate regions including the Indo-West Pacific, and Western Australia (Jones 2004; Chen et al. 2014) and it has been suggested that this wide range of distribution was due to human-mediated activities during global trade expansion (Chen et al. 2014).	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
A44BCA4F0D67E071453E9FA14884D28F.taxon	materials_examined	Non-type material examined. Andaman Sea: 2 specimens, Phang-nga province, Takua Thung district, Na Tai beach, 16. V. 2015, A. Pochai (BUU 16. BN. AR 01 - 02). Gulf of Thailand: 3 specimens, Chon Buri province, Si Racha district, Si Racha beach, 04. VII. 2015, A. Pochai (BUU 16. BN. AR 03 - 05). 3 specimens, Chon Buri province, Mueang Chon Buri district, Khao Sam Muk beach, 05. VII. 2015, A. Pochai (BUU 16. BN. AR 06 - 08). 3 specimens, Chon Buri province, Ko Si Chang district, Ko Kham Yai beach, 05. VII. 2015, S. Khachonpisitsak (BUU 16. BN. AR 09 - 11).	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
A44BCA4F0D67E071453E9FA14884D28F.taxon	description	Description. Peduncle absent; base calcareous. Shell white-pale pink and orange with 6 plates (1 carina, 2 carinal latus, 2 latus, 1 rostrum); single rows of parietal tubes (parietes single tubiferous) with transverse septa; radii solid. External surface with longitudinal and horizontal striations, transverse teeth on suture edges with denticles on lower regions, internal surface of parietes white. External surface of operculum white-pale pink and orange with striations in both tergum and scutum, internal surface of operculum white. Scutum bigger than tergum, scutum triangular; tergum spur sharp with growth lines.	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
A44BCA4F0D67E071453E9FA14884D28F.taxon	distribution	Distribution. Amphibalanus reticulatus is widely distributed from Japan, the Indo-West Pacific to Australia, of which the latter is considered as an introduced species carried by ship transport (Jones 2004). In this study, Amphibalanus reticulatus occurred in the intertidal zone along the Andaman Sea and the Gulf of Thailand. These specimens were found at Si Racha, Khao Sam Muk, Ko Kham Yai (Chon Buri) and Na Tai (Phang-nga).	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
2F909D19792A26D5FABEBFBCE2D7D758.taxon	materials_examined	Non-type material examined. Andaman Sea: 3 specimens, Phang-nga province, Takua Thung district, Na Tai beach, 16. V. 2015, A. Pochai (BUU 16. BN. MT 01 - 03).	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
2F909D19792A26D5FABEBFBCE2D7D758.taxon	description	Description. Peduncle absent; base calcareous. Shell cylindric or conic with 6 plates (1 carina, 2 carinal latus, 2 latus, 1 rostrum); parietes reddish to brownish red usually with longitudinal striations on external surface, parietes not prominently ribbed and rather smooth, irregular shape of parietal tubes (parietes tubiferous), sutural edges of radii with regular denticles, radii wide with horizontally striated, radii tubiferous; internal surface of parietes pale-purple with horizontal greyish violet striations around aperture. Orifice subcircular to rhombus. External surface of operculum white-pale pink and orange with prominent growth ridges in both tergums and scutums, internal surface of operculum white. Scutum bigger than tergum, scutum triangular, adductor ridge of scutum prominent; tergum with spur, spur furrow of tergum closed, scutal margin denticulate.	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
2F909D19792A26D5FABEBFBCE2D7D758.taxon	distribution	Distribution. Megabalanus tintinnabulum is widely distributed across almost all continents and is a well-known cosmopolitan fouling species. It was previously found in French Guiana, the United States, Australia, Mexico, Ecuador, Kuwait, Saudi Arabia, Sweden, France, Netherlands, Singapore, Indonesia and India (Henry and Mclaughlin 1986; Thiyagarajan et al. 1997; Jones et al. 2000; Jones 2004). Similar to Amphibalanus, it is considered as an introduced species in several regions and its distribution has been facilitated via shipping (Jones 2004). In Thailand, Megabalanus tintinnabulum specifically occurs in the low shores at Na Tai beach, Phang-nga province (the Andaman Sea). However, it does not appear to be a common fouling species as seen in some regions. Megabalanus tintinnabulum might have been introduced to Phang-nga beaches via ship transport, and the competition for habitat niche is compromised, compared to previously occupying cosmopolitan Amphibalanus amphitrite.	en	Pochai, Ashitapol, Kingtong, Sutin, Sukparangsi, Woranop, Khachonpisitsak, Salinee (2017): The diversity of acorn barnacles (Cirripedia, Balanomorpha) across Thailand's coasts: The Andaman Sea and the Gulf of Thailand. Zoosystematics and Evolution 93 (1): 13-34, DOI: http://dx.doi.org/10.3897/zse.93.10769, URL: http://dx.doi.org/10.3897/zse.93.10769
