Stereocidaris squamosa Mortensen 1928

Stereocidaris squamosa Mortensen, 1928b Fig. 13 A���C. Stereocidaris squamosa Mortensen, 1928a: 245 ���247. Pl. XX, Figs 4���6, Pl. LXX, Fig. 7. Pl. LXXX, Figs 10���16; Mortensen, 1928b: 70; Mortensen, 1932b: 151; Clark & Courtman-Stock, 1976: 218; Schultz, 2011: 1060, Figs 1844���1845. Material examined. MBC-A077750. Identification. Has a less aborally elevated test than Stereocidaris excavata, greenish apical disc (Mortensen 1928b), and gonopores centrally positioned; primary spines with broad tips, with about 15 longitudinal ridges, yellowish, slightly tapered, dark line towards neck of spines; naked lines along test plates. Global maximum size. Maximum test diameter 47 mm. Global distribution. East coast region of South Africa, Tanzania, Saya da Malha Bank, at 270���374 m depth (Mortensen 1928b; Clark & Courtman-Stock 1976). Remarks. Differs from the two endemic species S. capensis and S. excavata in primary spines and genital plates, respectively. Both S. capensis and S. squamous have slightly elevated genital plates with distally positioned gonopores, but differ in the number of longitudinal ridges on the spine; the latter having about 15 and the former 12 ridges. Differs from S. excavata in raised greenish apical disc, S. excavata having a sunken one.
Published as part of Filander, Zoleka & Griffiths, Charles, 2017, Illustrated guide to the echinoid (Echinodermata: Echinoidea) fauna of South Africa, pp. 1-72 in Zootaxa 4296 (1) on pages 17-18, DOI: 10.11646/zootaxa.4296.1.1, http://zenodo.org/record/843325
{"references":["Mortensen, T. (1928 b) Papers from Dr. Th. Mortensen's Pacific Expedition 1914 - 16, 44: New Cidaridae. (Preliminary Notice.). Videnskabelige Meddelelser fra Dansk naturhistorisk Forening i Kobenhavn, 85, 65 - 74.","Mortensen, T. (1928 a) A Monograph of the Echinoidea. I. Cidaroidea. C. A. Reitzel & Oxford University Press, Copenhagen & London, 551 pp.","Mortensen, T. (1932 b) New contributions to the knowledge of the cidarids. 1. Notes on some recent cidarids (echinoderms, echinoids, taxonomy). Det Kongelige Danske Videnskabernes Selskabs Skrifter, 4, 145 - 174.","Clark, A. & Courtman-Stock, J. (1976) The Echinoderms of Southern Africa. Publication no. 766. British Museum of Natural History, London, 277 pp.","Schultz, H. (2011) Sea-Urchins III, Worldwide Regular Deep Water Species. 1 st Edition. Scientific Publications, Hemdingen, 1338 pp."]}