Hippasteria aleutica Clark & Jewett, 2011, sp. nov.

• Main Authors: Clark, Roger N., Jewett, Stephen C.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2011
• Subjects: Biodiversity; Taxonomy; Animalia; Echinodermata; Asteroidea; Valvatida; Goniasteridae; Hippasteria; Hippasteria aleutica; Alaska; Aleutian Islands
• Online Access: https://doi.org/10.5281/zenodo.6193268; http://treatment.plazi.org/id/03D50E50573BA05C99EEFC71FE42CEA2

Hippasteria aleutica sp. nov. Figs. 1–7 Hippasteria sp. Barr & Barr, 1983: 175. Type locality. Alaska, Aleutian Islands, Rat Island (51º 49.594 N 178º 27.184 E), 13 m, (AKALE 07-A0031). Type material. Type Deposition Collection Location Collection Collection Date Collector & Method Depth, m Holotype LACM 2008 - 030.001 Rat Island 51 º 49.594 N, 13 June 8, 2008 R.N. Clark, scuba 1 specimen dry 178º 27.184 E, 13 m. AKALE 07-A0031 Paratype USNM 1125124 Chuginadak Is 17 June 16, 2006 H. Chenelot, scuba 1 specimen dry 52° 48.289 N 169° 42.526 W AKALE 06-0010 Paratype USNM E47392 Kiska Is 91 July 31, 1997 R.N. Clark, trawled 1 specimen dry 52° 04.17 N R/V Dominator 177° 15.20 E NMFS 23-199701-199 Additional material. Diagnosis. Large, broad, relatively rigid, R to 11 cm, R:r 1.7–1.8 (Figs. 1–2); disc very broad, rays short, sharply tapering; abactinal and marginal plates surrounded by pointed granules or thorns, bearing relatively short, thick, blunt, cylindrical spines; abactinal surface also profusely covered with small, bivalve to quadravalve pedicellaria (Fig. 3); adambulacral plates with two thick, blunt furrow spines, the adoral spine often more compressed than the aboral one, behind which are one or two very thick, blunt subadambulacral spines, and several bluntly pointed granules. Color in life orange to red-orange abactinally, actinal side pale yellow-cream. Description. Large, broad, only slightly inflated, relatively rigid, R to 11 cm, R:r 1.7–1.8 (Figs. 1–2); disc very broad, rays broad at base, sharply tapering; abactinal plates small, round or oval, each bearing a single short, blunt cylindrical or inflated (sometimes nearly spherical) spine, or rather short, wide, bivalve pedicellaria (Fig. 3); plates edged with thorn-like granules. Madreporite small, irregularly ridged, located about half way between the anus and the edge of the disc. Marginal plates (Fig. 4) in regularly paired rows; plates large, nearly round to quadrate, encircled by large (usually) pointed granules or thorns, and bearing ...