Henricia uluudax Clark & Jewett, 2010, sp. nov.

• Main Authors: Clark, Roger N., Jewett, Stephen C.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2010
• Subjects: Biodiversity; Taxonomy; Animalia; Echinodermata; Asteroidea; Spinulosida; Echinasteridae; Henricia; Henricia uluudax; Alaska; Aleutian Islands
• Online Access: https://doi.org/10.5281/zenodo.6197338; http://treatment.plazi.org/id/03DA070DBB631209FF113870FAB7FD95

Henricia uluudax sp. nov. Figures 21–26 Henricia spiculifera (Clark) Verrill, 1914: 232 ( pars ), non Cribrella spiculifera H.L. Clark, 1901. Henricia leviuscula multispina Fisher, 1911: 286 ( pars ), non Henricia leviuscula multispina Fisher, 1910: 571. Type locality: Alaska, Aleutian Islands, Fox Islands, Unalaska Island, NW entrance to Unalaska Bay, inside Eider Point (53º57. 33 N, 166º 35.5 W), 5 m. Type material: Holotype, LACM 1999-178.001 ( leg. R.N. Clark, 9 May, 1999); 1 Paratype, USNM 1125119 ( leg. R.N. Clark, 9 may, 1999); 1, CASIZ 180536 ( leg. R.N. Clark, 1999). Material examined: 2, LACM 1997-219.001, Atka Island, Crescent Bay, point at W end, 10 m ( leg. R.N. Clark & Robert Lauth, 8 July, 1997); 2, RNC, Unalaska Island, Eider Point, 0–5 m ( leg. R.N. Clark, 2 October, 2001); 1, RNC, Seguam Island, 12 m ( leg. Shawn Harper, 18 July, 2007); 2, LACM 2008-029.001, Avatanak Island, 6 m ( leg. R.N. Clark, 12 June, 2008). Diagnosis: Relatively small, fairly rigid, R to 5.3 cm (Holotype R = 4.5 cm), r to 10 cm, R:r 5–5.3; disc small, rays moderately long, slender, tapering. Abactinal plates small, close-set; some plates may form a single fine, faint medial line or ridge on the rays. Adambulacral plates with 19–24 fairly stout, compressed spines. Description: Relatively small, R to 5.3 cm, r to 1.0 cm, R:r 5–5.3; disc small, rays moderately long, slender, tapering to fairly blunt tips (Figs. 21 & 22). Abactinal plates very small, close-set (Fig. 23); pseudopaxillae round on disc, becoming triangular on rays, forming a tight reticulation, some apical plates often very close-set, nearly coalescing, forming a single very fine line or ridge at apex of ray; plates crowned with 37–60 fine, divergent, thorn-tipped spinules, about 0.25 to 0.30 mm in length; usually 3 slender thorns per spinule; papular areas rather small, with 2 –3 papulae; madreporite small, circular, irregularly radially spinose, located about 1/3 of the distance between the anus and the edge of the disc. Superomarginals 2 or 3 times as ...