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Type: Article
Published: 2019-10-31
Page range: 505–514
Abstract views: 266
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Atypical short elytra in Cretaceous short-winged flower beetles (Coleoptera: Kateretidae)

Institut für Geowissenschaften und Meteorologie, Rheinische Friedrich-Wilhelms-Universität Bonn, 53115 Bonn, Germany State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology and Centre for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, 210008 Nanjing, China
Department of Entomology, National Museum, 14800 Prague, Czech Republic
Coleoptera Kateretidae fossil evolution amber Myanmar Kachin brachelytry


Although the family Kateretidae has fewer than 100 described extant species, its fossil record is growing. The description given here of Electrumeretes birmanicus gen. et sp. nov. and Polliniretes penalveri gen. et sp. nov. brings the number of fossil species in Kateretidae up to nine. Eight of the fossil species have been described from amber deposits and six are from the Cretaceous. All the Cretaceous fossil species and one from the Eocene share atypically short elytra and three dorsally exposed abdominal tergites, whereas in Recent relatives, even though they have shortened elytra, only the pygidium and a part of the preceding one or two abdominal tergites are exposed. It is suggested that shortened elytra (brachelytry) represents an ancestral state and that elytra may have become secondary longer in extant relatives.


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