Stereocidaris excavata Mortensen, 1932b, Mortensen, 1932

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

publication ID

https://doi.org/10.11646/zootaxa.4296.1.1

publication LSID

lsid:zoobank.org:pub:EFE86EDD-D170-4D97-87D9-3125400713EC

persistent identifier

http://treatment.plazi.org/id/03FE87F0-FFB7-FFCC-FF57-FE1EFEBEFBED

treatment provided by

Plazi

scientific name

Stereocidaris excavata Mortensen, 1932b
status

 

Stereocidaris excavata Mortensen, 1932b  

Fig. 12 View FIGURE 12 A –C.

Stereocidaris excavata Mortensen, 1932b   . 151–154. Pl. II, Figs 1–5 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 . Pl. IV, Fig. 2 View FIGURE 2 . Pl. XI, Fig. 1–2 View FIGURE 1 View FIGURE 2 ; Clark & Courtman-Stock, 1976: 217; Schultz, 2011: 1040.

Material examined. MBC-A023320; MBC-A077747; MBC-A077745; MBC-A077748; MBC-A077746; MBC- A077744.

Identification. Similar to Stereocidaris capensis   ; but differs in sunken apical disc, which has centrally positioned and slightly raised gonopores. Primary spines slender, somewhat fluted, rugose, with about 12 finely serrate, low ridges; secondaries adpressed, chisel-like in shape. Denuded test creamish, with green tint.

Global maximum size. Maximum test diameter 69 mm.

Global distribution. Endemic to the South coast region of South Africa, at 120–177 m depth ( Mortensen 1932b; Clark & Courtman-Stock 1976; Schultz 2011).

Remarks. Both S. capensis   and S. excavata   are restricted to South African waters; they may, however, be differentiated by their primary spines and apical discs. S. capensis   has fusiform, stout primary spines with 20 longitudinal ridges and an elevated apical disc with distally arranged gonopores; whilst S. excavata   has fluted, slender primary spines with 12 low serrations and a distinctively sunken apical disc with centrally positioned, elevated gonopores.

Kingdom

Animalia

Phylum

Echinodermata

Class

Echinoidea

Order

Cidaroida

Family

Cidaridae

Genus

Stereocidaris

Loc

Stereocidaris excavata Mortensen, 1932b

Filander, Zoleka & Griffiths, Charles 2017
2017
Loc

Stereocidaris excavata

Mortensen 1932
1932