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Abaristophora sachalinensis Michailovskaya (Diptera: Phoridae) representing genitalic affinities with the genus Borophaga Enderlein


Hiroto Nakayama, Biosystematics Laboratory, Graduate School of Social and Cultural Studies, Kyushu University, 4-2-1 Ropponmatsu, Chuo-ku, Fukuoka, 810-8560 Japan. Email:


Abaristophora sachalinensis Michailovskaya is reviewed based on Japanese materials. Its male genitalia are compared with those of the genus Borophaga, which is a genus in a group of the related genera, the Borophaga subgroup. A synapomorphic character of the Borophaga subgroup including Abaristophora, the left flattened arm derived from the posterodorsal margin of the hypandrium being broadened at the base, is confirmed in A. sachalinensis. Morphology of the aedeagus in A. sachalinensis is complex and extremely asymmetric, and very similar to that of species of the genus Borophaga, but the characters observed in this study are not regarded as synapomorphic for the Borophaga subgroup.