Diadema savignyi (Audouin, 1809)

Fig. 27 A–B.

Diadema savignyi: H.L. Clark, 1925a: 43; Clark & Courtman-Stock, 1976: 225; Coleman et al., 1991: 169; Samyn, 2003: 201, Fig. 2 g; Schultz, 2010: 102, Figs 183–186.

Material examined. MBC-A023308.

Identification. Maximum of five interambulacra tubercles, in horizontal series. Blue iridescent lines along aboral plates, interambulacra with white spots; anal cone black. Spines black, banded in juveniles.

Global maximum size. Maximum test diameter 100 mm.

Global distribution. Kenya (Samyn, 2003), Red Sea to East coast of South Africa, eastwards to Easter Islands, from Japan to Australia; littoral to 70 m depth (Schultz 2010).

Remarks. Unlike Chaetodiadema africanum, aboral interambulacra area is not distinctively naked.