taxonID	type	description	language	source
03E96803FFD0E004B1ABA354FD03FEB3.taxon	materials_examined	Type: — USA. Hawai‘i, Papahānaumokuākea Marine National Monument, Kapou (Lisianski Island), 26.025277 ° N, 174.15694 ° W, 55 m depth, 30 July 2019, B. Hauk (holotype BISH 780872; ARS 09969; field code NWHI- 846). Description: Thallus crustose, prostrate, on coral rubble, reddish in color with orange markings (Fig. 1 A). Thallus moderately calcified, with undulating margins, and raised ridges on the thallus surface Fig. 1 A). Hypothallus filaments consisting of mostly unbranched, parallel files of rectangular cells, cells 5.0 – 7.0 µm in width × 16.3 – 19.0 µm in height, giving rise to perithallial assurgent filaments above and rhizoids below (Fig. 1 B – E). Crusts thin, ranging from 120 – 190 µm. Perithallial assurgent filaments arising at more or less 90 º angle from hypothallus (Fig. 1 B – D). Cells of mid- to lower perithallus irregularly subisodiametric, 5.1 – 9.2 µm in width × 7.5 – 11.4 µm in height (Fig. 1 B – D). Lower perithallial cells forming cellular projections and secondary pit connections (Fig. 1 B – D). Upper perithallial cells smaller than those in the lower perithallus, isodiametric to slightly taller than broad; 3.4 – 7.2 µm width × 6.7 – 8.2 µm height (Fig. 1 B, C). Rhizoids 4.8 – 10.0 µm diameter, medium to long, unbranched, and multicellular (Fig. 1 F). Hair cells absent (Fig. 1 G). Gametangial and tetrasporangial reproduction not observed.	en	Sherwood, Alison R., Cabrera, Feresa P., Spalding, Heather L., Alvarado, Erika A., Smith, Celia M., Hauk, Brian B., Matadobra, Stephen J., Kosaki, Randall K., Paiano, Monica O. (2021): Biodiversity of Hawaiian Peyssonneliales (Peyssonneliaceae, Rhodophyta): new species in the genera Incendia and Seiria. Phytotaxa 524 (1): 14-26, DOI: 10.11646/phytotaxa.524.1.2
03E96803FFD0E004B1ABA354FD03FEB3.taxon	distribution	Distribution and Habitat: — Known only from the type locality.	en	Sherwood, Alison R., Cabrera, Feresa P., Spalding, Heather L., Alvarado, Erika A., Smith, Celia M., Hauk, Brian B., Matadobra, Stephen J., Kosaki, Randall K., Paiano, Monica O. (2021): Biodiversity of Hawaiian Peyssonneliales (Peyssonneliaceae, Rhodophyta): new species in the genera Incendia and Seiria. Phytotaxa 524 (1): 14-26, DOI: 10.11646/phytotaxa.524.1.2
03E96803FFD0E004B1ABA354FD03FEB3.taxon	etymology	Etymology: — Named for the type locality. Identification using DNA sequence data: — Neighbor-joining analysis of available COI sequences for currently recognized species of Incendia and Seiria (and other non- Peyssonnelia species in the Peyssonneliales) supported the recognition of I. lisianskiensis as a novel species (Fig. 2). The Incendia lisianskiensis COI sequence (MZ 043101) differed by 7.4 % (p-distance) from its most similar congener with COI representation, I. regularis K. R. Dixon, and by> 9.0 % from all other available Incendia COI sequences. The rbcL phylogeny (ML topology is shown, with support values from both analyses included at nodes) also indicated a close relationship between I. lisianskiensis and I. regularis, supporting the inclusion of this specimen in the genus Incendia, and the distinction of I. lisianskiensis from other Incendia taxa included in the analysis (Fig. 3).	en	Sherwood, Alison R., Cabrera, Feresa P., Spalding, Heather L., Alvarado, Erika A., Smith, Celia M., Hauk, Brian B., Matadobra, Stephen J., Kosaki, Randall K., Paiano, Monica O. (2021): Biodiversity of Hawaiian Peyssonneliales (Peyssonneliaceae, Rhodophyta): new species in the genera Incendia and Seiria. Phytotaxa 524 (1): 14-26, DOI: 10.11646/phytotaxa.524.1.2
03E96803FFD3E008B1ABA05CFE9AFE4F.taxon	materials_examined	Type: — USA, Hawai‘i, off West Moloka‘i, 21.0455 ° N, 157.3524 ° W, 80 m depth, 28 November 2006, H. Spalding (holotype BISH 780873; ARS 09666; field code P 4 - 189 - cont. 8 - # 328). Description: Thallus crustose, prostrate, on coral rubble, brick red to dark, brownish maroon in color (Fig. 4 A, B). Thallus moderately to heavily calcified, somewhat lobed or entire, mostly to completely adherent to substratum. Crusts thin, typically approximately 100 µm, ranging from 80 – 180 µm (Fig. 4 C – E). Hypothallus filaments consisting of parallel files of cells (Fig. 4 G), mostly unbranched, cells 4.6 – 8.8 µm in width and 18.2 – 27.7 µm in height, giving rise to perithallial assurgent filaments above and rhizoids below. Perithallial assurgent filaments arising at 60 – 90 º angle from hypothallus (Fig. 4 C – E). Perithallus thin, composed of short filaments that are mostly 4 – 8 cells long (Fig. 4 C – E). Lower perithallial cells taller than broad, 14.5 – 24.8 µm in height × 5.9 – 8.0 µm in width (Fig. 4 D). Perithallial cells becoming shorter towards upper portion of perithallus. Mid-perithallial fusion cells absent. Uppermost perithallial cells quasi-isodiametric, 7.8 – 15.8 µm width × 5.0 – 9.3 µm height (Fig. 4 E). Cuticle on surface of perithallus 4 – 8 µm thick (Fig. 4 C – E). Rhizoids 5.4 – 8.8 µm diameter, mostly short to medium length, unbranched, and unicellular (Fig. 4 F). Hair cells absent (Fig. 4 H). Gametangial reproduction not observed. Mature tetrasporangia 43 – 99 × 22 – 44 µm, cruciate decussate to irregularly cruciate (Fig. 4 I), borne in raised, subcircular, scattered gelatinous nemathecia, nemathecial paraphyses up to 9 cells in length, 130 µm long (Fig. 4 J). Other examined material: — USA, Hawai‘i: Papahānaumokuākea Marine National Monument, Manawai (Pearl and Hermes Atoll), 27.9625 ° N, 175.8361 ° W, 67 m depth, 31 July 2019, S. Matadobra (BISH 780874; ARS 09967; field code NWHI- 833).	en	Sherwood, Alison R., Cabrera, Feresa P., Spalding, Heather L., Alvarado, Erika A., Smith, Celia M., Hauk, Brian B., Matadobra, Stephen J., Kosaki, Randall K., Paiano, Monica O. (2021): Biodiversity of Hawaiian Peyssonneliales (Peyssonneliaceae, Rhodophyta): new species in the genera Incendia and Seiria. Phytotaxa 524 (1): 14-26, DOI: 10.11646/phytotaxa.524.1.2
03E96803FFD3E008B1ABA05CFE9AFE4F.taxon	distribution	Distribution and Habitat: — Known from the off West Moloka‘i in the Main Hawaiian Islands and Manawai of the Papahānaumokuākea Marine National Monument at mesophotic depths of 67 - 80 m.	en	Sherwood, Alison R., Cabrera, Feresa P., Spalding, Heather L., Alvarado, Erika A., Smith, Celia M., Hauk, Brian B., Matadobra, Stephen J., Kosaki, Randall K., Paiano, Monica O. (2021): Biodiversity of Hawaiian Peyssonneliales (Peyssonneliaceae, Rhodophyta): new species in the genera Incendia and Seiria. Phytotaxa 524 (1): 14-26, DOI: 10.11646/phytotaxa.524.1.2
03E96803FFD3E008B1ABA05CFE9AFE4F.taxon	etymology	Etymology: — Named for the mesophotic depths at which the specimens were collected. Identification using DNA sequence data: — A DNA barcoding analysis of COI sequences for the two specimens of Hawaiian Seiria (MZ 043099 and MZ 043100) and available COI data for related taxa demonstrated less than 4 % sequence divergence between the two Hawaiian specimens (3.3 % difference between ARS 09666 and ARS 09967), and much greater distance to the type species, S. magnifusa K. R. Dixon (12.0 - 12.2 %; Fig. 2). The rbcL phylogeny supported S. magnifusa as the closest relative to S. mesophotica, with 12.1 - 13.0 % difference in the sequences of the two taxa (Fig. 3).	en	Sherwood, Alison R., Cabrera, Feresa P., Spalding, Heather L., Alvarado, Erika A., Smith, Celia M., Hauk, Brian B., Matadobra, Stephen J., Kosaki, Randall K., Paiano, Monica O. (2021): Biodiversity of Hawaiian Peyssonneliales (Peyssonneliaceae, Rhodophyta): new species in the genera Incendia and Seiria. Phytotaxa 524 (1): 14-26, DOI: 10.11646/phytotaxa.524.1.2
