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Two new species of Carcharodorhynchus Meixner, 1938 (Platyhelminthes: Rhabdocoela: Schizorhynchidae) from Brazil and Lanzarote

  • Diversity of marine meiofauna on the coast of Brazil
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Abstract

Two new turbellarian species of the kalyptorhynch taxon Carcharodorhynchus (Rhabdocoela: Schizorhynchidae) are described. C. brasiliensis n. sp. from Brazil differs from its congeners by the fact that only the ventral lip of the slightly asymmetrical proboscis bears denticles, arranged into two rows. It is also characterized by a unique combination of features: 10–12 testes arranged in two rows rostrally from the pharynx, elongated seminal vesicles, and the copulatory organ proper being a short cirrus, the distal tip of which is surrounded by a short sclerotized hood. C. worsaae n. sp. stands unique within the genus in that the male system has a long, double-walled stylet, which drains sperm and prostate secretion. Moreover, C. worsaae n. sp. has a markedly asymmetrical proboscis, with the dentition of the largest lip consisting of up to six rows of small denticles which are smallest proximally near the juncture with the smaller lip. The shorter lip has only large teeth. C. brasiliensis n. sp. is the first species of Carcharodorhynchus to be described from Brazil and the second for South America. C. worsaae is the first species of the taxon to be described from the West African coast.

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Acknowledgement

We thank Prof. Dr Katrine Worsaae and A. Martinez for organising the workshop in Lanzarote in 2011 and all participants of that workshop, including the divers, for helping with collecting. Dr Gustavo Fonseca is thanked for inviting us to the Taxonomy and Diversity of Marine Meiofauna, Brazil workshop (CEBIMar-USP), and all participants of that workshop for their help with the sampling. We thank Dr. Nikki Watson for correcting the language of the manuscript. Funding was provided by the São Paulo Research Foundation (FAPESP 2011/21289-3) and the Fonds Wetenschappelijk Onderzoek Vlaanderen (FWO, Research Foundation Flanders, project G.08.208).

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Authors and Affiliations

  1. Centre for Environmental Sciences, Research Group Zoology: Biodiversity and Toxicology, Hasselt University, Campus Diepenbeek, Agoralaan, Gebouw D, B-3590, Diepenbeek, Belgium

    Patrick Reygel, Ernest Schockaert & Tom Artois

  2. Research Unit Nematology, Ghent University, K.L. Ledeganckstraat 35, B-9000, Gent, Belgium

    Toon Janssen

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  1. Patrick Reygel
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  2. Ernest Schockaert
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  4. Tom Artois
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Correspondence to Patrick Reygel.

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Reygel, P., Schockaert, E., Janssen, T. et al. Two new species of Carcharodorhynchus Meixner, 1938 (Platyhelminthes: Rhabdocoela: Schizorhynchidae) from Brazil and Lanzarote. Mar Biodiv 44, 279–285 (2014). https://doi.org/10.1007/s12526-014-0205-8

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  • DOI: https://doi.org/10.1007/s12526-014-0205-8

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