Astrotholus antarcticus CASIZ ...
Astrotholus antarcticus (Fisher, 1940) FIGURE 1A–F Anseropoda antarctica Fisher, 1940: 149; Madsen 1955: 13; A.M. Clark 1962: 32 (key only); Bernasconi 1973a: 344. Diagnosis Body stellate (R/r=1.4–1.7), disk thick, strongly arched. Interradial arcs weakly curved to straight (Fig. 1A). Abactinal plat...
| Main Author: | |
|---|---|
| Format: | Text |
| Language: | unknown |
| Published: |
Zenodo
2023
|
| Subjects: | |
| Online Access: | https://dx.doi.org/10.5281/zenodo.8090089 https://zenodo.org/record/8090089 |
| Summary: | Astrotholus antarcticus (Fisher, 1940) FIGURE 1A–F Anseropoda antarctica Fisher, 1940: 149; Madsen 1955: 13; A.M. Clark 1962: 32 (key only); Bernasconi 1973a: 344. Diagnosis Body stellate (R/r=1.4–1.7), disk thick, strongly arched. Interradial arcs weakly curved to straight (Fig. 1A). Abactinal plates scalar, imbricate, covered by widely spaced truncate granuliform spinelets, 3 to 6, (Fig. 1B) distribution patterns associated with underlying plates. Superomarginals oval to quadrate with rounded edges in 1:1 relationship with inferomarginals. Superomarginals approximately twice to three times wider than inferomarginals, at least as viewed on the abactinal surface (Fig. 1C). Actinal plates with short, thorn-like spinelets, 2 to 5 (Fig. 1F). Furrow spines thorn-like, webbed 2 to 5 (6 indicated on the type) with spine number decreasing distally. Subambulacral spines, 2–5, webbed, arranged as an oblique comb relative to the furrow spines (Fig. 1D). Comments Except for a further occurrence of this species from the ... : 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 10-12, DOI: 10.11646/zootaxa.5310.1.1, http://zenodo.org/record/8090240 ... |
|---|