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Morphology and biology of the flower-visiting water scavenger beetle genus Rygmodus (Coleoptera: Hydrophilidae)

Yusuke Minoshima; Matthias Seidel; Jamie R. Wood; Richard A. B. Leschen; Nicole L. Gunter; Martin Fikáček


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  <identifier identifierType="DOI">10.5281/zenodo.3251092</identifier>
  <creators>
    <creator>
      <creatorName>Yusuke Minoshima</creatorName>
      <affiliation>Natural History Division, Kitakyushu Museum of Natural History and Human History,  Kitakyushu-shi, Japan</affiliation>
    </creator>
    <creator>
      <creatorName>Matthias Seidel</creatorName>
      <affiliation>Department of Zoology, Faculty of Science, Charles University in  Prague, Praha, Czech Republic</affiliation>
    </creator>
    <creator>
      <creatorName>Jamie R. Wood</creatorName>
      <affiliation>Long-term Ecology Lab, Manaaki Whenua, Lincoln, New Zealand</affiliation>
    </creator>
    <creator>
      <creatorName>Richard A. B. Leschen</creatorName>
      <affiliation>New  Zealand Arthropod Collection, Manaaki Whenua, Auckland, New Zealand</affiliation>
    </creator>
    <creator>
      <creatorName>Nicole L. Gunter</creatorName>
      <affiliation>Department  of Invertebrate Zoology, Cleveland Museum of Natural History, Cleveland, U.S.A.</affiliation>
    </creator>
    <creator>
      <creatorName>Martin Fikáček</creatorName>
      <affiliation>Department of Entomology, National Museum, Praha,  Czech Republic</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Morphology and biology of the flower-visiting water scavenger beetle genus  Rygmodus (Coleoptera: Hydrophilidae)</title>
  </titles>
  <publisher>Zenodo</publisher>
  <publicationYear>2019</publicationYear>
  <subjects>
    <subject>Cylominae</subject>
    <subject>ecological divergence</subject>
    <subject>gut contents</subject>
    <subject>immature stages</subject>
    <subject>larval morphology</subject>
    <subject>mouthparts</subject>
    <subject>pollen feeding</subject>
  </subjects>
  <dates>
    <date dateType="Issued">2019-06-20</date>
  </dates>
  <language>en</language>
  <resourceType resourceTypeGeneral="JournalArticle"/>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://zenodo.org/record/3251092</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsSupplementTo">10.1111/ens.12316</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsVersionOf">10.5281/zenodo.3251091</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="https://creativecommons.org/licenses/by/4.0/legalcode">Creative Commons Attribution 4.0 International</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;Hydrophilidae (water scavenger beetles) is well known as an aquatic beetle family;&amp;nbsp;&lt;br&gt;
however, it contains ca. 1,000 secondarily terrestrial species derived from aquatic&amp;nbsp;&lt;br&gt;
ancestors. The New Zealand endemic genus Rygmodus White is a member of the&amp;nbsp;&lt;br&gt;
hydrophilid subfamily Cylominae, which is the early-diverging taxon of the largest&amp;nbsp;&lt;br&gt;
terrestrial lineage (Cylominae + Sphaeridiinae) within the Hydrophilidae. In this paper&amp;nbsp;&lt;br&gt;
we demonstrate that Rygmodus beetles are pollen-feeding flower visitors as adults, but&lt;br&gt;
aquatic predators as larvae. Based on analyses of gut contents and a summary of&amp;nbsp;&lt;br&gt;
collecting records reported on museum specimen labels, adult Rygmodus beetles are&amp;nbsp;&lt;br&gt;
generalists feeding on pollen of at least 13 plant families. Rygmodus adult mouthparts&amp;nbsp;&lt;br&gt;
differ from those of other (saprophagous) hydrophilid beetles in having the simple&amp;nbsp;&lt;br&gt;
scoop-like apex and mola with roughly denticulate surface, resembling the morphology&amp;nbsp;&lt;br&gt;
found in pollen-feeding staphylinid beetles. Larvae were found along the sides of&amp;nbsp;&lt;br&gt;
streams, under stones and in algal mats and water-soaked moss; one collected larval&lt;br&gt;
specimens was identified using DNA barcoding of two molecular markers,&lt;br&gt;
mitochondrial cytochrome oxidase 1 (cox1) and nuclear histone 3 (H3). Larvae of two&amp;nbsp;&lt;br&gt;
species, Rygmodus modestus and Rygmodus sp., are described in detail and illustrated;&amp;nbsp;&lt;br&gt;
they closely resemble ambush-type predatory larvae of the hydrophilid tribe&amp;nbsp;&lt;br&gt;
Hydrophilini in the head morphology. Rygmodus is the only known hydrophilid beetle&amp;nbsp;&lt;br&gt;
with adults and larvae inhabiting different environments.&lt;/p&gt;</description>
  </descriptions>
  <fundingReferences>
    <fundingReference>
      <funderName>European Commission</funderName>
      <funderIdentifier funderIdentifierType="Crossref Funder ID">10.13039/100010661</funderIdentifier>
      <awardNumber awardURI="info:eu-repo/grantAgreement/EC/H2020/642241/">642241</awardNumber>
      <awardTitle>BIG4 - Biosystematics, Informatics and Genetics of the big 4 insect groups: training tomorrow's researchers and entrepreneurs</awardTitle>
    </fundingReference>
  </fundingReferences>
</resource>
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