The first fossil of dasycerine rove beetle (Coleoptera: Staphylinidae) from Upper Cretaceous Burmese amber: Phylogenetic implications for the omaliine group subfamilies |
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| Institution: | 1. Entomological Laboratory, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Hakozaki 6-10-1, Fukuoka 812-8581, Japan;2. Japan Society for the Promotion of Science Research Fellow (DC), Japan;1. Museum of Natural History, University of Wroc?aw, Sienkiewicza 21, 50-335, Wroc?aw, Poland;2. Departament d''Estratigrafia, Paleontologia i Geociències Marines, and Institut de Recerca de la Biodiversitat (IRBio), Facultat de Geologia, Universitat de Barcelona, Martí i Franquès s/n, 08028, Barcelona, Spain;1. Tokushima Prefectural Museum, Mukoterayama, Hachiman-cho, Tokushima 770-8070, Japan;2. Entomological Laboratory, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 6-10-1 Hakozaki, Fukuoka 812-8581, Japan;3. Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba City, Ibaraki 305-0001, Japan;1. Laboratory of Systematic Entomology, College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China;2. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, And Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing, 210008, China;1. Department of Biology, College of Life and Environmental Sciences, Shanghai Normal University, Shanghai, 200234, China;2. Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, 210008, China;3. School of Earth Sciences, University of Bristol, Bristol, BS8 1TQ, UK;4. Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing, 210008, China;5. Center for Integrative Research, Field Museum of Natural History, Chicago, IL, 60605, United States;1. Entomological Laboratory, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 6-10-1 Hakozaki, Fukuoka, 812-8581, Japan;2. Naturhistorisches Museum Wien, Burgring 7, 1010, Wien, Austria;3. Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tenoudai, Tsukuba, Ibaraki, 305-0001, Japan |
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| Abstract: | The enigmatic staphylinid subfamily Dasycerinae consists of only 17 species within a single extant genus Dasycerus, but it is easily distinguished from other rove beetles by overall, latridiid beetle-like body and extremely slender, verticillate antennae. Direct fossil evidence is lacking for this group. Here, I describe the first fossil of this peculiar subfamily, Protodasycerus aenigmaticus gen. and sp. n., from the Upper Cretaceous Burmese amber. Despite considerable external similarities to extant dasycerine species, this new genus possesses several important morphological differences: a much smaller body size (ca. 1.1 mm), narrowly elongate antennomeres 1 and 2, not strongly transverse metaventrite, elytra striate but not tricostate, and truncate posterior margin of the elytra exposing four abdominal tergites dorsally. The new finding of a Cretaceous representative of the Dasycerinae helps elucidate the origin and early evolution of the omaliine group subfamilies, implying rather close similarities between the Dasycerinae and the monobasic subfamily Neophoninae. Discovery of P. aenigmaticus suggests a rather ancient origin of the subfamily by the Upper Cretaceous. |
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| Keywords: | New genus Dasycerinae Neophoninae Cenomanian Myanmar |
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