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Ancorabolus chironi sp. nov., the first record of a member of the Ancorabolus-group (Copepoda: Harpacticoida: Ancorabolidae) from the Mediterranean

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Abstract

Multicorer sampling at Anaximenes Seamount (eastern Mediterranean) during RV METEOR cruise M 71/1 in December 2006 yielded several specimens of a new species of Ancorabolidae Sars, 1909. The new species belongs to the taxon Ancorabolus Norman, due to the following apomorphies: (1) process bearing cephalothoracic sensillar group I more produced and spinous; (2) cephalothoracic sensillar group II: sensilla b–c and posterior tube-pore arising from individual thorn-like processes; anterior tube-pore raised; (3) cephalothoracic sensillar group IV: constriction and allometric growth resulting in distad displacement of sensilla a and d; (4) P3 enp-2 inner seta absent; (5) P4 female enp-2 inner seta absent; (6) P4 enp-2 outer element sexually dimorphic (setiform in female, spiniform in male). It differs, however, from the remaining species in overall shape, ornamentation of natatory legs and presence of anterior processes on cephalic shield. This justifies the erection of a new species, Ancorabolus chironi sp. nov. The record constitutes the first finding for members of the Ancorabolus group in the Mediterranean. A diagnostic key to the Ancorabolus species is provided.

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Acknowledgements

We would like to thank the crew and fellow colleagues working on the RV Meteor during the M71/1 cruise for their help and support. Furthermore, the authors thank Mrs A. Hellmann and Mr. Jörg Hans (DZMB, Wilhelmshaven, Germany) for sorting the Mediterranean meiofauna samples. Dr. J. Michels (Kiel, Germany) helped in the production of the CLSM photos. Dr. F. Peine (Rostock, Germany) provided the map showing the sampling stations in Fig. 1. We are indebted to two anonymous reviewers for their helpful comments, constructive critics, and improvement of the English text. Participation of KHG on the M 71/1 cruise was financially supported by the Deutsche Forschungsgemeinschaft (DFG).

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  1. Carl-von-Ossietzky-Universität Oldenburg, 26111, Oldenburg, Germany

    Markus Schulz

  2. Senckenberg am Meer, Abt. DZMB, Südstrand 44, 26382, Wilhelmshaven, Germany

    Kai Horst George

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  1. Markus Schulz
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Correspondence to Kai Horst George.

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Schulz, M., George, K.H. Ancorabolus chironi sp. nov., the first record of a member of the Ancorabolus-group (Copepoda: Harpacticoida: Ancorabolidae) from the Mediterranean. Mar Biodiv 40, 79–93 (2010). https://doi.org/10.1007/s12526-010-0035-2

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