Astrotholus infernalis Mah 2023, n. gen. ...

• Main Author: Mah, Christopher L.
• Format: Text
• Language: unknown
• Published: Zenodo 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Echinodermata; Asteroidea; Valvatida; Asterinidae; Astrotholus; Astrotholus infernalis; Antarctic; Cabeza; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.5281/zenodo.8092122; https://zenodo.org/record/8092122

Astrotholus infernalis n. gen. n. sp. FIGURE 2A–F Hurtado-Garcia & Manjón-Cabeza 2022: 1220 (as Anseropoda antarctica ) Etymology The species epithet “ infernalis ” describing “lower regions” and alluding to the great depth occurrence of this species. Diagnosis Body pentagonal to weakly stellate (R/r=1.3–2.5, but mostly between 1.4–1.6), arms triangular, disk arched, actinal surface concave, interradial arcs weakly curved to straight (Fig. 2A). Abactinal plates imbricate, flat to mound-like or arched (Fig. 2C). Abactinal plate surfaces each covered with spinelets, 4–20, mostly 5–10, widely spaced (Fig. 2B). Spinelet tips hyaline, 3–4. Marginal plates 30 to 38 to 40 (at R=1.0, R=1.2 to R=1.6 respectively) per interradius (arm tip to arm tip), imbricate. Superomarginal plates oval to quadrate in shape (Fig. 2C), plate surface with 5–12 spinelets bearing minute hyaline tips, 3–4 identical to those of abactinal plates. Inferomarginal plates approximately 50% the size of the superomarginal plates, quadrate in ... : Published as part of Mah, Christopher L., 2023, New Genera, Species, and observations on the biology of Antarctic Valvatida (Asteroidea), pp. 1-88 in Zootaxa 5310 (1) on pages 12-14, DOI: 10.11646/zootaxa.5310.1.1, http://zenodo.org/record/8090240 ...