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    Hard and soft anatomy in two genera of Dondersiidae (Mollusca, Aplacophora, Solenogastres)

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    Date
    2012-06-01
    Author
    Scheltema, Amelie H.  Concept link
    Schander, Christoffer  Concept link
    Kocot, Kevin M.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/5273
    As published
    https://doi.org/10.1086/BBLv222n3p233
    DOI
    10.1086/BBLv222n3p233
    Abstract
    Phylogenetic relationships and identifications in the aplacophoran taxon Solenogastres (Neomeniomorpha) are in flux largely because descriptions of hard parts––sclerites, radulae, copulatory spicules––and body shape have often not been adequately illustrated or utilized. With easily recognizable and accessible hard parts, descriptions of Solenogastres are of greater use, not just to solenogaster taxonomists, but also to ecologists, paleontologists, and evolutionary biologists. Phylogenetic studies of Aplacophora, Mollusca, and the Lophotrochozoa as a whole, whether morphological or molecular, would be enhanced. As an example, morphologic characters, both isolated hard parts and internal anatomy, are provided for two genera in the Dondersiidae. Five species are described or redescribed and earlier descriptions corrected and enhanced. Three belong to Dondersia: D. festiva Hubrecht, D. incali (Scheltema), and D. namibiensis n. sp., the latter differentiated unambiguously from D. incali only by sclerites and copulatory spicules. Two species belong to Lyratoherpia: L. carinata Salvini-Plawen and L. californica (Heath). Notes are given for other species in Dondersiidae: L. bracteata Salvini-Plawen, Ichthyomenia ichthyodes (Pruvot), and Heathia porosa (Heath). D. indica Stork is synonymized with D. annulata. A cladistic morphological analysis was conducted to examine the utility of hard parts for reconstructing solenogaster phylogeny. Results indicate monophyly of Dondersia and Lyratoherpia as described here.
    Description
    Author Posting. © Marine Biological Laboratory, 2012. This article is posted here by permission of Marine Biological Laboratory for personal use, not for redistribution. The definitive version was published in Biological Bulletin 222 (2012): 233-269.
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    Suggested Citation
    Biological Bulletin 222 (2012): 233-269
     
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