A revisional study on fossil Donaciinae from the Plio-Pleistocene Kazusa Group in Saitama Prefecture, Japan, with reference to phylogeny of the extinct Plateumaris dorsata Hayashi (Coleoptera, Chrysomelidae)

Abstract

In the Upper Pliocene to Lower Pleistocene Kazusa Group of the western hills of Kanto Plain, fossil donaciine beetles occur in relative abundance. Six species from this group in Saitama Prefecture are described, and the species composition is compared with those from the adjacent Pleistocene deposits. The phylogeny and the geographic history of Plateumaris dorsata Hayashi, 1997, described from this group, is discussed on the basis of the morphology, geographic distribution and fossil records of the related extant species.