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Neotropical Leaf Litter Beetle Genus Motonerus (Coleoptera: Hydrophilidae): New Species, Distribution Data, and Description of Third Instar Larva

  • Systematics, Morphology and Physiology
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Abstract

Numerous new material of the genus Motonerus Hansen, 1989 (Coleoptera: Hydrophilidae: Sphaeridiinae) was examined over the past decade, resulting in the discovery of several undescribed species as well as new distributional records for most of the previously described species. Three species are here described as new: Motonerus explanatus sp. nov. (Panama), M. inca sp. nov. (Venezuela, Ecuador, Peru, Bolivia) and M. sofiae sp. nov. (Peru). New country records are provided for M. depressus Fikáček & Short (new for Venezuela, Ecuador, Peru and Bolivia), M. hanseni Fikáček & Short (new for Panama) and M. problematicus Fikáček & Short (new for Panama). An updated identification key and distributional maps are provided for all species, along with complete occurrence data in a DarwinCore formatted file. Potential distribution of the genus is modeled using the maximum entropy approach. Wing morphology is examined in detail, which revealed most species are macropterous, with M. andersoni Fikáček & Short being brachypterous, and M. apterus Fikáček & Short, M. oosternoides Fikáček & Short, and M. explanatus sp. nov. micropterous. The third instar of the putative larva of M. obscurus Hansen is briefly described based on larvae collected in association with adults.

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Acknowledgments

I am indebted to A. E. Z. Short (KSEM), Al Newton, and Margaret Thayer (FMNH) for hosting me in Lawrence and Chicago in summer 2009 when most of the specimens for this paper were examined; additional loans from KSEM and CMN were able thanks to Andrew Short, Zack Fallin, Robert Anderson, and Francois Genier. Additional material from Mexico was collected thanks to Emmanuel Arriaga-Varela, Fredy Alvarado, and Jesús Cortés Aguilar who allowed me to participate on a field work nicely organized by them. Kristýna Tejmlová (Kladno, Czech Republic) was helping a lot with taking SEM micrographs of previously described Motonerus species. Bruno Clarkson (Brazil) criticized and hence helped to improve the taxonomic part of the manuscript. Jiří Šmíd (NMPC) provided additional advice concerning the use of ENMtools programm; Marianna Simoes (Senckenberg Research Institute, Germany) provided a critique of the ecological niche modeling part of an earlier version of this manuscript which allowed me to perform the analysis more accurately.

Nomenclature

ZooBank registration can be found at: http://zoobank.org/urn:lsid:zoobank.org:pub:E38E8F6F-A63F-43DC-9C7F-B8871338979B

Funding

The study was supported by the Ministry of Culture of the Czech Republic (DKRVO 2019-2023/5.I.a, National Museum, 00023272).

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Authors and Affiliations

  1. Dept of Entomology, National Museum, Cirkusová 1740, Praha 9, CZ-19300, Czech Republic

    M Fikáček

  2. Dept of Zoology, Faculty of Science, Charles Univ, Vinicna 7, Praha 2, Czech Republic

    M Fikáček

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  1. M Fikáček
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Correspondence to M Fikáček.

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Fikáček, M. Neotropical Leaf Litter Beetle Genus Motonerus (Coleoptera: Hydrophilidae): New Species, Distribution Data, and Description of Third Instar Larva. Neotrop Entomol 48, 788–808 (2019). https://doi.org/10.1007/s13744-019-00679-4

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  • DOI: https://doi.org/10.1007/s13744-019-00679-4

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