Dasycerine rove beetles: Cretaceous diversification, phylogeny and historical biogeography (Coleoptera: Staphylinidae: Dasycerinae)

  • Zi‐Wei Yin
    Laboratory of Systematic Entomology College of Life Sciences Shanghai Normal University Shanghai 200234 China
  • Liang Lü
    Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province College of Life Sciences Hebei Normal University Shijiazhuang Hebei Province 050024 China
  • Shûhei Yamamoto
    Integrative Research Center Field Museum of Natural History 1400 S Lake Shore Drive, 7 Chicago IL 60605 USA
  • Margaret K. Thayer
    Integrative Research Center Field Museum of Natural History 1400 S Lake Shore Drive, 7 Chicago IL 60605 USA
  • Alfred F. Newton
    Integrative Research Center Field Museum of Natural History 1400 S Lake Shore Drive, 7 Chicago IL 60605 USA
  • Chen‐Yang Cai
    State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Center for Excellence in Life and Paleoenvironment Chinese Academy of Sciences Nanjing 210008 China

抄録

<jats:title>Abstract</jats:title><jats:p>Within the hyperdiverse beetle family Staphylinidae, Dasycerinae is one of the smallest and most cryptic subfamilies, comprising a sole extant genus characterized by a latridiid beetle‐like body form. Little has been known about their early diversification, character evolution, phylogeny and historical biogeography because of limited fossil material and lack of a phylogeny integrating extant and extinct representatives. Here we report an unexpectedly diverse dasycerine fauna from the mid‐Cretaceous of northern Myanmar, including a new genus and four new species. To reconstruct the early evolutionary history of Dasycerinae, we present a phylogenetic framework of the subfamily based on a dataset integrating all extant and extinct taxa using parsimony, maximum‐likelihood and Bayesian methods. †<jats:italic>Cedasyrus</jats:italic> <jats:bold>gen. n.</jats:bold>, characterized by distinct sexual dimorphism in antennal and elytral lengths, is recovered as the basal‐most lineage, sister to the remaining two extinct genera and all living <jats:italic>Dasycerus</jats:italic> species. †<jats:italic>Vetudasycerus</jats:italic> is recovered as sister to †<jats:italic>Protodasycerus</jats:italic> + <jats:italic>Dasycerus</jats:italic>. Among all extinct taxa, †<jats:italic>Protodasycerus</jats:italic> bears distinctly longer elytra, and appears to represent a transitional form from †<jats:italic>Vetudasycerus</jats:italic> to <jats:italic>Dasycerus</jats:italic>. Phylogenetic inferences and ancestral distribution reconstruction support an “Out‐of‐Orient” model for Dasycerinae. Either the Bering‐ or North Atlantic Land Bridge may have served as a passageway for dasycerine dispersal between Eurasian and North American continents. An elevation‐reconstruction analysis indicated that the ancestor of the extant <jats:italic>Dasycerus</jats:italic> probably lived at a high altitude and stayed at this elevation through the end of the Miocene. We propose that the extinction of dasycerine ancestors living on the Tethyan islands at low altitude was likely caused by sea‐level rise and climatic warming during the Late Cretaceous. The high‐altitude areas might have played the role of refugia that harboured subalpine derivatives which eventually gave rise to the extant <jats:italic>Dasycerus</jats:italic>.</jats:p>

収録刊行物

  • Cladistics

    Cladistics 37 (2), 185-210, 2020-07-29

    Wiley

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