Key to the species of Richalpheus Anker & Jeng, 2006 1. Major chela with dactylus relatively slender, without bulge or tooth; pollex with longitudinal groove proximally; distal margin of uropodal exopod truncate, but not incised............................... R. dahabensis Anker & Dworschak, 2007 – Major chela with dactylus relatively stout, with bulge or tooth; pollex with rounded fossa proximally; distal margin of uropodal exopod truncate and incised............................................................................ 2 2. Major chela dactylus with broad bulge at about mid-length of cutting edge; antennular peduncle with second article more than twice as long as wide, first article with mesioventral carina ending in small subacute tooth; distolateral margin of uropodal exopod slightly incised............................................................ R. palmeri Anker & Jeng, 2006 – Major chela dactylus with well-defined, distally excavated tooth in proximal half of cutting edge; antennular peduncle with second article about 1.5 times as long as wide, first article with mesioventral carina ending bluntly; distolateral margin of uropodal exopod more deeply incised..................................................... R. alpheoides sp. nov.

Published as part of Anker, Arthur, 2011, Description of a third species in the alpheid shrimp genus Richalpheus Anker & Jeng, 2006 (Crustacea, Decapoda), pp. 59-68 in Zootaxa 3059 on page 66, DOI: 10.5281/zenodo.278924