Shallow-water reef ophiuroids (Echinodermata: Ophiuroidea) of Réunion (Mascarene Islands), with biogeographic considerations Author Boissin, Emilie Author Hoareau, Thierry B. Author Paulay, Gustav Author Bruggemann, J. Henrich text Zootaxa 2016 4098 2 273 297 journal article 10.11646/zootaxa.4098.2.4 13fb3418-fb61-410f-9ce2-93099f5344d7 1175-5326 255654 D446E3D3-5B5B-431A-80E6-1318638DFA27 Ophiocomella sexradia (DUNCAN, 1887) (UF-6491, Fig. 4 g, KU594363 ) Material. 1 spm, St. 5; 1 spm, St. 8 Remarks. This small (DD = 2 mm ) species is the only known ophiocomid with six arms. Specimens have small elongate granules on the dorsal surface of the disc, three to four arm spines, and are mottled green and whitish. Abundance: 1. Distribution. Widespread across the IWP ( Clark & Rowe 1971 ), previously recorded from Réunion ( Guille & Ribes 1981 ; Stöhr et al. 2008 ) and Rodrigues ( Rowe & Richmond 2004 ).