Solaster hexactis Clark & Jewett, 2011, sp. nov.
Solaster hexactis sp. nov. Figures 1 –7 Type locality: Alaska, Aleutian Islands, W of Buldir Island (52 ° 18.50 N, 175 ° 49.00 E), 325 m. Type material. Table 1. Description. Small six-rayed form, Holotype, R = 41 mm, r = 15 mm. R: r = 1: 2.7 (range 1: 1.7 to 1: 2.7); disc relatively small, rays mod...
| Main Authors: | , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
| Published: |
2011
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| Subjects: | |
| Online Access: | https://zenodo.org/record/5611029 https://doi.org/10.5281/zenodo.5611029 |
| Summary: | Solaster hexactis sp. nov. Figures 1 –7 Type locality: Alaska, Aleutian Islands, W of Buldir Island (52 ° 18.50 N, 175 ° 49.00 E), 325 m. Type material. Table 1. Description. Small six-rayed form, Holotype, R = 41 mm, r = 15 mm. R: r = 1: 2.7 (range 1: 1.7 to 1: 2.7); disc relatively small, rays moderately long, tapering to rather blunt tips. Dorsal side (Fig. 1) moderately inflated. Papular pores numerous, small, occurring singularly or in pairs; papulae rather small. Abactinal plates cruciform, imbricating; Pseudopaxillae relatively large, bearing 20–40 spinelets with thorny tips; Madreporite very small, only about twice as large as pseudopaxillae, radially grooved, surrounded and obscured by six pseudopaxillae (Fig. 2). Superomarginals only slightly larger than aboral pseudopaxillae. Inferomarginal plates about three to four times as wide as long, spaced about one half length apart, and usually slightly off set from the adjacent supramarginal; fan shaped, bearing about 50 + spinelets. Ventral side flattened; Oral interradial areas relatively wide, and bearing 40– 65 overlapping oblong plates with short pseudopaxillae bearing five to eight spinelets; synactinal series extending about one fifth of ray length. Adambulacral plates (Fig. 3) about four times as wide as long, slightly curved, and slightly tapering distally, spaced a little more than one length apart; bearing a bristling curved actinal series of six to eight (five in very small, <R 10 mm specimens) moderately long, stout, tapering, membrane covered spines of about equal length, the tips of which are thorny, and a furrow series of two (one in very small, <R 10 mm specimens) long, slender, tapering, membrane covered spines, webbed at the base; base of spines rather bulbous. Paired oral plates (Fig. 4) shovel-shaped, each bearing five to seven long, slender, membrane covered marginal spines, webbed at the base, with thorny tips, and four to eight (normally seven) short, slender, un-webbed sub oral spines. Living color of shallow-water specimens ... |
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