Sphaeriodiscus mirabilis A.M. Clark 1976 ...
Sphaeriodiscus mirabilis A.M. Clark, 1976 (Figures 18 A–E) A.M. Clark, 1976: 248 Distribution. South Indian Ocean (St. Paul and Amsterdam Islands) to the South Atlantic (Bouvetoya Island and Tristan de Cunha). 195– 462 m. Material examined. South Atlantic. USNM 1116242 Tristan de Cunha 37˚19’29”S, 1...
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Zenodo
2011
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| Online Access: | https://dx.doi.org/10.5281/zenodo.6184379 https://zenodo.org/doi/10.5281/zenodo.6184379 |
| Summary: | Sphaeriodiscus mirabilis A.M. Clark, 1976 (Figures 18 A–E) A.M. Clark, 1976: 248 Distribution. South Indian Ocean (St. Paul and Amsterdam Islands) to the South Atlantic (Bouvetoya Island and Tristan de Cunha). 195– 462 m. Material examined. South Atlantic. USNM 1116242 Tristan de Cunha 37˚19’29”S, 12˚29’48”W, 195 m. Coll. Moss Landing Marine Laboratories. (1 dry spec. R=2.9, r=2.2). CASIZ 174584 Bouvetoya Island 54˚21’36”S, 3˚10.3’E, 455–462 m, Coll. S. Lockhart (2 wet specs. R=3.5, r=2.5, R=4.2, r=3.3). Description. Body pentagonal (R/r=1.3 to 1.4), stout, thick. Interradial arcs weakly concave (Fig. 18 A). No pedicellariae observed on body surface. Abactinal plates hexagonal to round in outline, closely abutted forming a crowded pavement (Fig. 18 B). Plates become more oblong and oval-shaped and dense on abactinal surface at contact with superomarginal plates. Larger specimens (R>3.0 cm) with more rounded abactinal plates whereas smaller specimens (R= 2.9 cm) with more hexagonal plates (e.g., Fig. 18 ... : Published as part of Mah, Christopher L., 2011, Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa, pp. 1-48 in Zootaxa 2759 on pages 44-46, DOI: 10.5281/zenodo.276783 ... |
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