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Abstract
Three species of the Lema (Lema) concinnipennis Baly, Citation1865 species group are found in Japan: L. concinnipennis Baly, Citation1865; L. cyanella (Linnaeus, Citation1758); and L. cirsicola Chûjô, Citation1959. Their apparent similarity causes confusion in identification. We have therefore revised their classification and provide the following taxonomic treatments: the syntypes of L. concinnipennis var. ventralis Kuwayama, Citation1932 have been identified as L. concinnipennis and L. cyanella, and the latter is designated the lectotype; L. inaequalicollis Pic, Citation1924 and L. concinnipennis var. ventralis are resurrected from synonymy with L. concinnipennis and newly synonymized under L. cyanella; we have found that L. cyanella ab. nigricans Jacobs, Citation1926 is an unavailable name, although the name had been accepted as available for a long time; L. sapporensis Matsumura, 1911 is resurrected from synonymy with L. cyanella. In addition, we provide a key to three species, diagnosis, and redescriptions for the three species.
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Acknowledgements
Y.M. greatly thanks M. Schmitt for giving many suggestions and advice on the present study. Y.M. also thanks P. Jolivet, H. Suenaga, K. Ueda and H. Yoshitomi for lending specimens used in the study. M. Minami kindly gave her a valuable book used in the present study. T. Yoshida kindly took photos of type specimens deposited in MNHN. H. Takizawa gave some advice on taxonomic arrangements. M. Yasui told Y.M. about techniques for taking SEM.