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- W2045791610 abstract "Morphologically, Scarabaeoidea is one of the best-studied groups of beetles. However, the incomplete preservation of presently known fossils is a fundamental problem in the interpretation of extinct species of the superfamily. Wing venation has long been recognized as a valuable character system in taxonomic and phylogenetic analyses. However, to date hind wing features of scarab fossils have not been analysed using geometric morphometrics. A new genus and a new species, Septiventer quadridentatus gen. et sp. nov., is described and illustrated and assigned to a new scarabaeoid family Septiventeridae fam. nov., based on one well-preserved specimen from the Yixian Formation of Liaoning Province, China. The phylogenetic position of Septiventer is inferred based on 68 morphological characters using a cladistic approach. Additionally, based on a geometric morphometric analysis of the hind wing of Septiventer, the structural affinities of 161 scarabs and six outgroup species is analysed, using 261 wing landmarks. Septiventeridae is identified as the sister group of the remaining Scarabaeoidea, with Glaresidae and Trogidae as the next branches. Consequently, it is crucial for an understanding of the early diversification of the superfamily, and for the reconstruction of early evolutionary transformations in the group. Septiventeridae differs strongly from most ‘modern’ lineages in wing shape. However, the structural affinity of the hind wings of Septiventeridae, Glaresidae and Trogidae are robustly supported by the results from morphometrics. This fits well with the phylogenetic hypothesis based on the general character set and strongly suggests that this wing pattern is closest to the scarabaeoid groundplan. The morphological features suggest good flying abilities of Septiventer, that it might have been active during the daytime, processed soft food, and was less active in digging tunnels than extant, more specialized dung beetles. http://zoobank.org/urn:lsid:zoobank.org:pub:B0076219-3F4C-4E3D-8054-7DA855E0D8A4" @default.
- W2045791610 created "2016-06-24" @default.
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- W2045791610 date "2012-12-03" @default.
- W2045791610 modified "2023-10-17" @default.
- W2045791610 title "Septiventeridae, a new and ancestral fossil family of Scarabaeoidea (Insecta: Coleoptera) from the Late Jurassic to Early Cretaceous Yixian Formation" @default.
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- W2045791610 doi "https://doi.org/10.1080/14772019.2012.660995" @default.
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