Two new meiofaunal species of Trilobodrilus (Dinophilidae, Annelida) from California, USA

  • Alexandra Kerbl Marine Biological Section – Department of Biology, University of Copenhagen, Universitetsparken 4, 2100 Copenhagen Ø
  • Emilie Hernes Vereide Marine Biological Section – Department of Biology, University of Copenhagen, Universitetsparken 4, 2100 Copenhagen Ø
  • Brett C. Gonzalez Marine Biological Section – Department of Biology, University of Copenhagen, Universitetsparken 4, 2100 Copenhagen Ø
  • Greg W. Rouse Scripps Institution of Oceanography, 9500 Gilman Drive, La Jolla, California 92093–0202
  • Katrine Worsaae Marine Biological Section – Department of Biology, University of Copenhagen, Universitetsparken 4, 2100 Copenhagen Ø
DOI: https://doi.org/10.5852/ejt.2018.421
Keywords: Interstitial, intertidal zone, meiobenthos, morphology

Abstract

We describe two new species of the annelid genus Trilobodrilus Remane, 1925 (Dinophilidae Verill, 1892) from an intertidal and a subtidal location in San Diego, California. These two species show morphological and molecular divergences between each other and the previously described, geographically distant species. Intertidal T. windansea sp. nov. differs from subtidal T. ellenscrippsae sp. nov. most remarkably in the number and pattern of ciliary tufts and bands on the prostomium and along the body length, besides showing ca 15% difference in gene fragments of COI and CytB. Trilobodrilus windansea sp. nov., though nesting with T. ellenscrippsae sp. nov. in the molecular phylogenetic analyses, morphologically resembles the Japanese T. itoi Kajihara, Ikoma, Yamasaki & Hiruta, 2015 most closely, but still differs from this species in the higher number of apical ciliary tufts, an additional ciliary row posterior to the second ciliary band, and by lacking a forth ciliary band and segmentally arranged lateral ciliary tufts. Trilobodrilus ellenscrippsae sp. nov. is morphologically most similar to the Japanese T. nipponicus Uchida & Okuda, 1943, but is much shorter, has more apical ciliary tufts, and less regularly arranged lateral ciliary tufts along the body. All species differ significantly in all compared gene fragments, and no obvious correlation was found between habitat and the species morphology or relationships.

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Published
2018-04-03
How to Cite
Kerbl, A., Vereide, E. H., Gonzalez, B. C., Rouse, G. W., & Worsaae, K. (2018). Two new meiofaunal species of Trilobodrilus (Dinophilidae, Annelida) from California, USA. European Journal of Taxonomy, (421). https://doi.org/10.5852/ejt.2018.421
Issue
No. 421 (2018): Two new meiofaunal species of Trilobodrilus (Dinophilidae, Annelida) from California, USA
Section
Zoology
Copyright (c) 2018 Alexandra Kerbl, Emilie Hernes Vereide, Brett C. Gonzalez, Greg W. Rouse, Katrine Worsaae

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