DNAbased identification of sexual dimorphism in the Phoridae (Diptera)
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Abstract： The Phoridae are an extremely large family within the Diptera. Phoridae are mainly small and often exhibit sexual dimorphism. More than 50% of described species are known from just one sex. The divisions of taxa within the family in the current classification system are widely disputed. Identification of many species and phylogenetic reconstruction remain as two important problems for resolution by the world’s phoridologists. Due to a lack of available morphological characters, it is very difficult to resolve these problems using traditional morphological methods, and DNA\|based identification systems represent a promising approach to resolving this taxonomic impediment. We examined 4 species, Megaselia scalaris (Loew), Megaselia spiracularis Schmitz, Diplonevra peregrina (Wiedemann) and Dohrniphora cornuta (Bigot), using DNA methods. Quick and accurate species\|level identifications were provided by use of the 676 bp COⅠ sequence, which could play an important role in taxonomy, biological control, port quarantine and forensic identification, etc.