New Genera, Species, and observations on the biology of Antarctic Valvatida (Asteroidea) Author Mah, Christopher L. text Zootaxa 2023 2023-06-27 5310 1 1 88 http://dx.doi.org/10.11646/zootaxa.5310.1.1 journal article 55246 10.11646/zootaxa.5310.1.1 95de53d6-ac5c-424e-a3ed-087bc2e2912b 1175-5326 8090240 C6664128-1B4E-40C8-80E8-6D09AB49CB30 Paralophaster hyalinus H.E.S. Clark, 1970b Paralophaster hyalinus H.E.S. Clark, 1970b: 177 ; H.E.S. Clark & McKnight 2001: 10–11 . Diagnosis Body stellate (R/r=2.25–3.00), arms triangular, disk thick, interradial arcs acute. Abactinal plates forming an irregular reticulate network, paxillate, each with four to five basal lobes. Paxillae each with hyaline spinelets, 8–25, each spinelet with single to bifid-tipped points. Marginal plates paxillate, 16–18 per arm side (32–36 per interradius). Each paxillae with hyaline spinelets, Superomarginal paxillae with more slender shaft than inferomarginals which are more trunk-like. Superomarginal paxillar spinelets, 15–25; inferomarginal paxillar spinelets 13–24. Spinelets on both, fine, hyaline. Actinal intermediate region small. Actinal plates lobate with four to five basal lobes, each with pedunculate surface bearing 4–5 hyaline, thorn-tipped spines. Adambulacral plates separated by tissue filled space. Furrow spines 2–4, hyaline tipped with basal web. Subambulacral spines 4, positioned oblique to right angles relative to furrow spines. Each subambulacral spine with serrate edge, especially at tip (“needle-like points” of H.E.S. Clark 1970b: 179 ). Oral plates broad with basally webbed spines, 6–8, suboral spines two or three, similar to furrow spines. Comment Specimens examined corresponded to the description outlined by H.E.S. Clark (1970b) and Clark & McKnight (2001) . However they were distorted and damage by preservation/collection and these appeared very close to Lophaster . Further work and comparison with other South Pacific Lophaster material is warranted. Occurrence Challenger Ridge , Chatham Rise , Bounty Platform , Macquarie Ridge , South Pacific. 39–890 m . Material Examined USNM 1662076 , Macquarie Ridge , New Zealand , South Pacific . −51.008 , 162.017 , 333–371 m . Coll. R/V Eltanin , USAP . 1 dry spec. R=2.4 r=0.8. USNM 1662077 , Macquarie Ridge , New Zealand , South Pacific . −53.75, 159.075, 787–842 m . Coll. Coll. R/V Eltanin , USAP . 1 dry spec. R=1.8 r=0.8.