Two new species of Microprosthema from the Western Atlantic (Crustacea: Decapoda: Stenopodidea)

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Abstract
Two new species of shrimp in the genus Microprosthema are described and figured on the basis of materials collected recently from the tropical western Atlantic. Specimens of one, Microprosthema manningi, have been collected from Florida, Mexico, Belize and Old Providence Island. The other new species, Microprosthema looensis, was taken from a single site in the Florida Keys. Microprosthema manningi is closely related to the western Atlantic M. semilaeve, while M. looensis is closely related to the Indo-Pacific M. scabricaudatum. However, both new species can be distinguished by numerous morphological differences, as well as by coloration.