Euryalid brittle stars from the International Indian Ocean Expedition 1963 - 64 (Echinodermata: Ophiuroidea: Euryalida) Author Baker, Alan N. Author Okanishi, Masanori Author Pawson, David L. text Zootaxa 2018 2018-03-08 4392 1 1 27 journal article 28700 10.11646/zootaxa.4392.1.1 6251bf04-bedf-44cf-92b2-73e551eb56f6 1175-5326 1194434 B6A80A66-E868-4578-A5E5-655E0F18AA84 Astroboa clavata ( Lyman, 1861 ) ( Fig. 5D–J ) Astrophyton clavatum Lyman, 1861 : 85 . Astroboa clavata . Döderlein, 1911 : 80 . Pl. 5, figs 6,6a; 1912: 269, pl.16, figs 1, 1b, 16, pl. 18, fig. 8; 1927: 38, pl.5, figs 5,6; Putchakarn and Sonchaeng, 2004 : 421 ; Venkatraman et al , 2013 : 208 . Material Examined. Anton Bruun Cruise 9, Indian Ocean , Comoro islands , Mayotta Island , Bandeli Reef , 13° 30’ S , 045°16’ E , 23 26 November 1964, 1 specimen, now lost ; USNM 1072477 , Anton Bruun Cruise 9 Station 465, off NE Somalia , 11° 37’ N 51° 27’ E , 67–72 m , 18 December 1964, 1 specimen ( Fig. 5D–J ). Remarks. This species is characterised by having prominent radial shields and a covering of minute thorny granules ( Fig. 5D, F, G ). Similar granules extend into the oral interbrachial areas. The arm segments are separated by marked depressions with thickened edges ( Fig. 5H ). There is also a median furrow along the aboral sutures of each arm ( Fig. 5I ). Girdle bands with hooklets occur terminally on each arm ( Fig. 5J ). A. clavata was first collected off Zanzibar , and has subsequently been found in the waters of the Persian Gulf, Bay of Bengal, Mauritius , and northwestern Australia ( Rowe & Gates, 1995 ).