The sponge-dwelling snapping shrimps (Crustacea, Decapoda, Alpheidae, Synalpheus) of Discovery Bay, Jamaica, with descriptions of four new species Iii, Kenneth S Macdonald Hultgren, Kristin Duffy, Emmett Zootaxa 2009 2199 1 57 85YZZ Rios and Duffy Rios and Duffy [151,573,1586,1612] Malacostraca Alpheidae Synalpheus Animalia Decapoda 50 51 Arthropoda species yano   Material examined. Jamaica: non-ovigerous individual, ovigerous female ( VIMS08JAM4801,02), Columbus Park, Discovery Bay, from canals of  Hymeniacidon caerulea. MaxCL ovigerous female: 3.32 mm. MaxCL non-ovigerous individual: 3.75 mm.  Color.Dull gold; darker in the distal portion of the major chela; embryos and ovaries brick red.   Hosts and ecology.This pair was found in the midnight-blue sponge  Hymeniacidon caerulea. In Belize,  S. yanois most commonly found in  Lissodendoryx colombiensis, but is also found in  H. caeruleaand  Calyx podatypade Laubenfels.  PLATE 7.A,  Pseudoceratina( Aiolochroia) crassa(08JAM32), including an unidentified soft, filmy grey-brown sponge lining the canals, fore-reef (near M1 channel marker), Discovery Bay, Jamaica. B,  Aulettacf. sycinularia(08JAM27), external view, Dairy Bull Reef, Jamaica. C, Same, interior view. D,  Agelascf. clathrodes(08JAM61), external view, Columbus Park, Discovery Bay, Jamaica. E, Same, interior view. F,  Agelascf. dispar(08JAM82), interior view, Rio Buenos, Jamaica.   Distribution. Belize(Macdonald et al. 2006; Ríos and Duffy 2007); Jamaica(this study).   Remarks.  Synalpheus yanois another member of the morphologically similar complex of species that includes  S. pandionis, S. dardeaui, and S. ul. It can be distinguished by its complete lack of a blade on the scaphocerite, and by the equally sized spines of the distal margin of the telson.