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Morphology and phylogenetic relationships of the neotenic interstitial polychaete Apodotrocha progenerans n.gen., n.sp. (Annelida)

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Summary

Apodotrocha progenerans n.gen., n.sp. from tidal beaches or shallow waters on the east coast of the USA (Massachusetts) is a gonochoristic interstitial polychaete (length ca. 600 μm; six trunk segments), that lacks parapods, setae, and fleshy appendages, but has three characteristic caudal cirri. The habitus greatly resembles a larval stage of the Dorvilleidae, a family with which it also shares several anatomical features as revealed by ultrastructural investigations. Great similarities to the so-called archiannelids belonging to the Dinophilidae are also apparent, thus demonstrating the close phylogenetic relationship of the latter family to the Dorvilleidae.

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  1. W. Westheide

    Present address: Fachbereich Biologie/Chemie, Universität Osnabrück, Postfach 4469, D-4500, Osnabrück, Federal Republic of Germany

Authors and Affiliations

  1. II. Zoologisches Institut der Universität Göttingen, Berliner Str. 28, D-3400, Göttingen, Bundesrepublik Deutschland

    W. Westheide

  2. Marine Science Institute, Northeastern University, 01 908, Nahant, MA, USA

    N. W. Riser

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  1. W. Westheide
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  2. N. W. Riser
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Westheide, W., Riser, N.W. Morphology and phylogenetic relationships of the neotenic interstitial polychaete Apodotrocha progenerans n.gen., n.sp. (Annelida). Zoomorphology 103, 67–87 (1983). https://doi.org/10.1007/BF00312239

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