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A new genus and species of Apseudomorpha (Crustacea: Tanaidacea) from the Mar del Plata submarine Canyon, South West Atlantic, and replacement of the preoccupied name Hoplomachus Guţu 2002

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Abstract

A new apseudomorph tanaidacean, Deidamiapseudes poseidon n. gen., n. sp., is fully described and illustrated based on many specimens collected in the Mar del Plata Submarine Canyon, South West Atlantic, at 1144 m depth. The new genus Deidamiapseudes is closely related to the genus Hoplomachus Guţu, 2002, from which it can be distinguished by the lack of ommatidia, and by having antennule accessory flagellum of three articles, antenna with small scale, and pleopods with a few setae. In addition, Deidamiapseudes poseidon n. gen., n. sp. was found in deep-sea waters, whereas Hoplomachus is a shallow water genus. The uncertain family position of these two genera is discussed. The name Hoplomachus Guţu, 2002, preoccupied by Hoplomachus Fieber, 1858, is replaced with the name Hoplopolemius.

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Acknowledgments

We thank Ignacio Chiesa for collecting the specimens used in this study, and to Brenda Doti, Natalia Alberico, and Clara Giachetti and Ignacio Chiesa for sorting out specimens under the dissecting microscope. Thanks are also due to the officers and crew of the RV Puerto Deseado for their help on board during the Talud Continental 2012 and Talud Continental 2013 surveys. Two anonymous reviewers provided comments that greatly improved this manuscript. The senior author thanks CONICET for the doctoral scholarship grant. This research was partially supported by the Universidad de Buenos Aires (UBACyT 20020130100711BA) and the Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET (PIP 11220130100434CO).

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Correspondence to Daniel Roccatagliata.

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Communicated by A. Brandt

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Sganga, D.E., Roccatagliata, D. A new genus and species of Apseudomorpha (Crustacea: Tanaidacea) from the Mar del Plata submarine Canyon, South West Atlantic, and replacement of the preoccupied name Hoplomachus Guţu 2002. Mar Biodiv 46, 687–698 (2016). https://doi.org/10.1007/s12526-015-0422-9

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