26
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: not found
      • Article: not found

      Basal polyphagan beetles in mid-Cretaceous amber from Myanmar: biogeographic implications and long-term morphological stasis

      Read this article at

      ScienceOpenPublisherPMC
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The origin and early evolutionary history of polyphagan beetles have been largely based on evidence from the derived and diverse ‘core Polyphaga’, whereas little is known about the species-poor basal polyphagan lineages, which include Scirtoidea (Clambidae, Decliniidae, Eucinetidae, and Scirtidae) and Derodontidae. Here, we report two new species Acalyptomerus thayerae sp. nov. and Sphaerothorax uenoi sp. nov., both belonging to extant genera of Clambidae, from mid-Cretaceous Burmese amber. Acalyptomerus thayerae has a close affinity to A. herbertfranzi , a species currently occurring in Mesoamerica and northern South America. Sphaerothorax uenoi is closely related to extant species of Sphaerothorax , which are usually collected in forests of Nothofagus of Australia, Chile, and New Zealand. The discovery of two Cretaceous species from northern Myanmar indicates that both genera had lengthy evolutionary histories, originated at least by the earliest Cenomanian, and were probably more widespread than at present. Remarkable morphological similarities between fossil and living species suggest that both genera changed little over long periods of geological time. The long-term persistence of similar mesic microhabitats such as leaf litter may account for the 99 Myr morphological stasis in Acalyptomerus and Sphaerothorax . Additionally, the extinct staphylinoid family Ptismidae is proposed as a new synonym of Clambidae, and its only included species Ptisma zasukhae is placed as incertae sedis within Clambidae.

          Related collections

          Most cited references39

          • Record: found
          • Abstract: not found
          • Article: not found

          Fossiliferous Cretaceous Amber from Myanmar (Burma): Its Rediscovery, Biotic Diversity, and Paleontological Significance

            Bookmark
            • Record: found
            • Abstract: not found
            • Book: not found

            Early Flowers and Angiosperm Evolution

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              The peril of dating beetles

                Bookmark

                Author and article information

                Journal
                Proceedings of the Royal Society B: Biological Sciences
                Proc. R. Soc. B
                The Royal Society
                0962-8452
                1471-2954
                January 16 2019
                January 16 2019
                : 286
                : 1894
                : 20182175
                Affiliations
                [1 ]CAS Key Laboratory of Economic Stratigraphy and Palaeogeography, Center for Excellence in Life and Paleoenvironment, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China
                [2 ]School of Earth Sciences, University of Bristol, Life Sciences Building, Tyndall Avenue, Bristol BS8 1TQ, UK
                [3 ]Australian National Insect Collection, CSIRO, GPO Box 1700, Canberra, ACT 2601, Australia
                [4 ]Integrative Research Center, Field Museum of Natural History, 1400 S Lake Shore Drive, Chicago, IL 60605, USA
                [5 ]Landcare Research, New Zealand Arthropod Collection, Private Bag 92170, Auckland, New Zealand
                [6 ]Department of Biology, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, People's Republic of China
                [7 ]State Key Laboratory of Palaeobiology and Stratigraphy, Center for Excellence in Life and Paleoenvironment, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China
                [8 ]Division of Entomology, Natural History Museum, University of Kansas, Lawrence, KS 66045, USA
                [9 ]Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS 66045, USA
                Article
                10.1098/rspb.2018.2175
                6367173
                30963875
                448bb765-0797-43eb-a298-caf7742d2cd7
                © 2019
                History

                Comments

                Comment on this article