Studies of Gymnomyzinae (Diptera: Ephydridae), II. A Revision of the Shore Fly Subgenus 'Pseudohecamede' Hendel of the Genus 'Allotrichoma' Becker

摘要

Species of Pseudohecamede are revised and are treated as a subgenus of the genus Allotrichoma. Other subgenera of Allotrichoma are diagnosed and keyed, and genera related to Allotrichoma are keyed and placed in Hecamedini, new tribe, which is diagnosed. Nine species are now known in Pseudohecamede, five of which are new (in alphabetical order): A. adustum (Belize, Stann Creek District, Twin Cays), A. baja (Mexico, Baja California,Todos Santos), A. ecuadorensis (Ecuador, Manabi Province, Bahia), A. jamaicense (Jamaica, Wag Water), and A. steineri (Costa Rica, Guanacaste Province, Playa Tamarindo). Species of Pseudohecamede occur only in the New World, particularly in subtropical and tropical zones, where they apparently occupy microhabitats similar to those of the nearctic Allotrichoma, sensu stricto. Descriptions of species are accompanied by distributional maps and illustrations of male terminalia. For some species, diagnostic characters of the head and thorax are also provided. A key to the species is included.