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Deep-sea Kinorhyncha: two new species from the Guinea Basin, with evaluation of an unusual male feature

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Abstract

Two new species of homalorhagid kinorhynchs from the deep-sea Guinea Basin are described. Pycnophyes nubilis sp. nov. is easily recognized by the presence of paradorsal setae on segment 1; middorsal processes on segments 1–10, progressively increasing in length towards the posterior segments; and middorsal process on segment 10 extending over the last trunk segment. Pycnophyes farinellii sp. nov. is distinguished by middorsal elevations on segments 2–9 and laterodorsal and ventromedial setae on segments 2 and 9 only. Moreover, males of the latter species lack ventromedial tubes on segment 2—a very uncommon feature among the genus. The systematic significance of this character is discussed in detail.

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Acknowledgments

The authors want to thank participants of the R/V Meteor Diva2 M63/2 Cruise and the staff and students of the Senckenberg Research Institute in Wilhelmshaven for collecting and sorting the specimens used in this study. Special thanks are given to Dr. Pedro Martínez Arbizu for making the specimens available for us. This research received support from the SYNTHESYS Project http://www.synthesys.info/ to Nuria Sánchez, which is financed by European Community  Research Infrastructure Action under the FP7 "Capacities" Program. We also thank Dr. Jon Norenburg, William Moser, and Kathryn Ahlfeld, Smithsonian Institution, for loaning us specimens of Pycnophyes egyptensis from the collections of the USNM as well as for letting us study the kinorhynchs collection of the USNM, adding herein new information of species previously described. This work was supported by the Research Project CGL 2009-08928 (Ministerio de Ciencia y Tecnología, Government of Spain).

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Authors and Affiliations

  1. Department of Zoology and Anthropology, Faculty of Biological Sciences, Universidad Complutense de Madrid (Invertebrate Zoology), José Antonio Novais, 2, 28040, Madrid, Spain

    Nuria Sánchez & Fernando Pardos

  2. Section for Geogenetics, Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade, 5-7, 1350, Copenhagen, Denmark

    Martin V. Sørensen

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  1. Nuria Sánchez
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  2. Fernando Pardos
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  3. Martin V. Sørensen
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Correspondence to Nuria Sánchez.

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Sánchez, N., Pardos, F. & Sørensen, M.V. Deep-sea Kinorhyncha: two new species from the Guinea Basin, with evaluation of an unusual male feature. Org Divers Evol 14, 349–361 (2014). https://doi.org/10.1007/s13127-014-0182-6

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  • DOI: https://doi.org/10.1007/s13127-014-0182-6

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