Abai, MR

6th International Congress of DipterologyMorphological and genetical relationships among theJapanese chironomid species of the genus Polypedilum.Kawai, K., T. Ohsugi & H. ImabayashiLaboratory of Aquatic Ecology, Graduate School of Biosphere Science, HiroshimaUniversity, Kagamiyama 1-4-4, Higashihiroshima-shi, Hiroshima, 739-8528 JapanThe phylogenetic trees of the Japanese species of the chironomid genusPolypedilum were constructed on the basis of 29 morphological charactersof male adults and of the sequence of CO region of mtDNA andcompared. All the members of the subgenus Tripodura and a group of thesubgenus Polypedilum each constructed a single cluster by themselveswhereas those of other subgenera, Pentapedilum, Uresipedilum and othergroups of Polypedilum, constructed such clusters that comprize multiplesubgenera in the morphological tree. There were many exchanges inmember of cluster between morphological and genetical trees. For example,P.(U.) cultellatum constructed a cluster with P.(U.) hiroshimaense in themorphological tree whereas it constructed a cluster with P. (T.)decematoguttatum in the genetic tree. On the contrary, a few pair, e.g.,P.(P.) pedestre and P.(P.) tamaharaki, constructed a cluster in the geneticas well as morphological trees. These results suggest that many charactersof the adult male of this genus be a product of convergence.Key Words: adult male, chironomid, mitochondria DNA, morphology,Polypedilum∗∗∗∗∗∗∗∗∗∗131