Illustrated guide to the echinoid (Echinodermata: Echinoidea) fauna of South Africa Author Filander, Zoleka Author Griffiths, Charles text Zootaxa 2017 4296 1 1 72 journal article 32399 10.11646/zootaxa.4296.1.1 ad746972-3837-4f1d-bf97-c09e5d7f1bd5 1175-5326 843325 EFE86EDD-D170-4D97-87D9-3125400713EC * Echinometra oblonga ( Blainville, 1825 ) Fig. 48 A–B. Echinometra oblonga : A. Agassiz, 1863 : 21 ; A. Agassiz, 1872 –1874: 116, 433. Pl. XXXVI, Fig. 5 ; H.L. Clark, 1912 : 373 –374; H.L. Clark, 1925a : 144 ; Schultz, 2011 : 1276 , Fig. 2275; Filander & Griffiths, 2014 : 53 . Pl. II, Fig. C. Echinometra mathei oblonga : Mortensen, 1943 : 393 –395. Pl. XLVIII, Figs 1–20 . FIGURE 48. Echinometra oblonga A . Map showing distribution. B . Aboral view of preserved specimen (Schultz, 2011c). Material examined. None, entry based on literature. Identification. Closely related to Echinometra mathaei , difficult to distinguish the two with just morphological characters. Global maximum size. Maximum test diameter 90 mm . Global distribution. East coast region of South Africa ( Filander & Griffiths 2014 ). East Africa, Mauritius and Maldives through to Philippines , Indonesia and New Guinea to Okinawa , Guam and Hawaii , plus south Pacific Islands; strictly littoral ( Schultz 2011 ). Remarks. Previously recognized as a morph of E. mathaei ( Mortensen 1943 ) ; however subsequent genetic ( Palumbi and Metz 1991 , Landry et al . 2003 ), reproductive ( Rahman & Uehara 2004 ) and ecological ( Nishihira et al . 1991 ) studies led to recognition of the two as separate species ( Kroh & Mooi 2015 ). Maher (2011) documents E. oblonga in South African waters for the first time.