Rhynchocinetes rathbunae, a New Shrimp from the Hawaiian Islands (Crustacea: Decapoda: Rhynchocinetidae)

Abstract

A new species of caridean shrimp of the family Rhynchocinetidae, Rhynchocinetes rathbunae Okuno, is described and illustrated based on six males, an ovigerous female, a second female, and a juvenile from the Hawaiian Islands. It is closely related to R. brucei Okuno from the tropical western Pacific and R. rugulosus Stimpson from southern Australian waters, but is readily distinguishable from the two latter species by absence of a podobranch on the second maxilliped, the longer rostrum, forms of the stylocerite and endopod of male first pleopod, meral dentition of the ambulatory pereiopods, and the color in life.