Sponge-dwelling snapping shrimps (Alpheidae: Synalpheus) of Barbados, West Indies, with a description of a new eusocial species Author Hultgren, Kristin M. Author Iii, Kenneth S Macdonald Author Duffy, Emmett text Zootaxa 2011 2834 1 16 journal article 10.5281/zenodo.208079 d257ffa5-d83e-449f-9be3-b456ab6f7b28 1175-5326 208079 Synalpheus idios ( Rios & Duffy 2007 ) Material examined. Barbados : 14 non-ovigerous individuals, 2 ovigerous females ( VIMS 08BR6502, 08BR6601– 4), Harrison’s Point reef, from Hyrtios cf. proteus . 17 non-ovigerous individuals, 4 ovigerous females ( VIMS 08BR101–5), Pamir reef, from Hyrtios cf. proteus . Largest ovigerous female, CL 3.90 mm , largest non-ovigerous individual, CL 4.66 mm . Color. As elsewhere in the Caribbean, S. idios females had brick-red ovaries and embryos. Hosts and ecology. In Barbados , S. idios was found in groups of several individuals (with numerous ovigerous females present) in Hyrtios cf. proteus ; it has been found in a similar host in Curaçao (Hultgren et al. 2010). Distribution. Belize (Macdonald et al. 2006; Ríos & Duffy 2007 ), Curaçao (Hultgren et al. 2010), Barbados (this study). Remarks. In Barbados , S. idios can be distinguished from the related species S. bousfieldi by the shape of the distal projection on the major chela, which is conical-shaped in S. idios and lacks the small secondary projection typically found in S. bousfieldi . These closely related species also appear to be limited to different hosts ( Hyrtios cf. proteus for S. idios , Agelas clathrodes for S. bousfieldi ).