Synalpheus williamsi Ríos and Duffy

Iii, Kenneth S Macdonald, Hultgren, Kristin & Duffy, Emmett, 2009, The sponge-dwelling snapping shrimps (Crustacea, Decapoda, Alpheidae, Synalpheus) of Discovery Bay, Jamaica, with descriptions of four new species, Zootaxa 2199, pp. 1-57 : 51

Synalpheus williamsi Ríos and Duffy

Material examined. Jamaica: non-ovigerous individual ( VIMS 08JAM6601), Dairy Bull Reef, from canals of Hymeniacidon caerulea . Non-ovigerous individual, ovigerous female ( VIMS 08JAM6701,02), Dairy Bull Reef, from canals of Hymeniacidon caerulea . MaxCL non-ovigerous individual: 2.95 mm. Color. Golden-brown; distal portion of major chela bright orange-red; ovaries and embryos green. Hosts and ecology. Synalpheus williamsi was only found in the midnight-blue sponge Hymeniacidon caerulea in Jamaica.

Distribution. Belize (Macdonald et al. 2006; Ríos and Duffy 2007); Jamaica (this study). Remarks. As has been mentioned in accounts of S. williamsi from other regions (Ríos and Duffy 1999), individuals often have traces of dark blue in their gut, presumably from the pigment of their host sponge H. caerulea .

PLATE 6. A, Synalpheus yano ovigerous female (08JAM4601) from Hymeniacidon caerulea, Columbus Park, Discovery Bay , Jamaica. B, Synalpheus yano non-ovigerous individual (08JAM4602) from Hymeniacidon caerulea, Columbus Park, Discovery Bay , Jamaica.