Vol. 46 No. 4, 2007

Pseudalpheopsis guana gen. nov., sp. nov. (Crustacea: Decapoda), a New Alpheid Shrimp from the British Virgin Islands, Caribbean Sea

Arthur Anker

Instituto Smithsonian de Investigaciones Tropicales, Apartado 0843-03092, Balboa, Ancón, Panamá, República de Panamá / Smithsonian Tropical Research Institute, Naos Unit 0948, APO AA 34002, USA

Arthur Anker (2007) Pseudalpheopsis guana gen. nov., sp. nov. is described on the basis of a single male specimen collected from an artificial reef matrix structure (ARMS) off Guana I., British Virgin Is., Caribbean Sea.  Pseudalpheopsis, gen. nov. appears to be most closely related to Alpheopsis Coutière, 1896 (sensu lato), but differs from all species currently placed in this genus by the unique armature of the chelipeds and the presence of a“pseudo-hepatic tooth”on the anterior margin of the carapace, above the pterygostomial angle.

Key words: Alpheidae, New genus, Western Atlantic, Coral reef, Caridea.

*Correspondence: E-mail: ankera@si.edu