Stereocidaris capensis Döderlein, 1901

Filander, Zoleka & Griffiths, Charles, 2017, Illustrated guide to the echinoid (Echinodermata: Echinoidea) fauna of South Africa, Zootaxa 4296 (1), pp. 1-72 : 16-17

Stereocidaris capensis Döderlein, 1901

Fig. 11 A–C.

Stereocidaris capensis: Döderlein, 1906: 110 –112. Pl. X, Figs 3–6 . Pl. XII, Fig. 2 . Pl. XXXVI, Fig. 4 . Pl. XXXVII, Fig. 1 . H.L. Clark, 1925a: 25 –26; Mortensen, 1928a: 369. Pl. LXXI, Fig. 1 ; Clark & Courtman-Stock, 1976: 217; Schultz, 2011: 1039, Figs 1796–1799.

Material examined. MBC-A077742; MBC-A077743.

Identification. Test moderately high; apical disc large, evenly raised, all plates exsert, genital pores distally positioned; spines long, tapered, stout, with about 20 longitudinal ridges.

Global maximum size. Maximum test diameter 36 mm.

Global distribution. Endemic to South coast region of South Africa ( Clark & Courtman-Stock 1976); at 475– 900 m.

Remarks. Specimen identified through this study extends previously known distribution northwards towards Durban. Record also illustrates a 400 m depth extension from the previously known maximum depth of 500 m ( Döderlein 1910; Clark & Courtman-Stock 1976) to 900 m.

Figures

FIGURE 1. Detail of regular echinoid: upper (Stomopneustes variolaris) and lower (Stereocidaris excavata) side, showing terminology of various body parts.

FIGURE 2. Body plan of an irregular echinoid or sand dollar (Clypeaster rarispinus), showing terminology of various body parts.

FIGURE 3. The body plan of an irregular echinoids or heart urchin (Echinocardium cordatum), showing terminology of different body parts.

FIGURE 4. Tubercle types: A. perforated and non-crenulated (Stereocidaris alcocki). B. non-perforated and non-crenulated (Stomopneustes variolaris). C. perforated and crenulated (Chaetodiadema africanum).

FIGURE 5. Histocidaris elegans (SAMC-A 22212): A. Side view of preserved specimen. B. Apical system of preserved specimen.

FIGURE 6. Eucidaris metularia (SAMC-A 28226): A. Map showing distribution. B. Side view of preserved specimen. C. Apical system of preserved specimen.

FIGURE 11. Stereocidaris capensis (MB-A 077743): A. Map showing distribution. B. Side view of preserved specimen. C. Close-up apical system of preserved specimen.