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Issue: Vol. 4860 No. 2: 12 Oct. 2020
Type: Article
Published: 2020-10-12
DOI: 10.11646/zootaxa.4860.2.3
Page range: 199–210
Abstract views: 97
PDF downloaded: 21

Paraleptopentacta, a new Mediterranean and north-west Atlantic sea cucumber genus, with the first record of P. tergestina n. comb. (Echinodermata: Dendrochirotida: Cucumariidae) from the north-western Algerian coast

Protection, Valorization of Coastal Marine Resources and Molecular Systematics Laboratory, Department of Marine Science and Aquaculture, Faculty of Natural Sciences and Life, Abdelhamid Ibn Badis University—Mostaganem, PO Box 227, Route nationale N° 11, Kharrouba, 27000, Mostaganem, Algeria.
School of Life Sciences, University of KwaZulu-Natal, P/Bag X54001, Durban 4000, South Africa.
Protection, Valorization of Coastal Marine Resources and Molecular Systematics Laboratory, Department of Marine Science and Aquaculture, Faculty of Natural Sciences and Life, Abdelhamid Ibn Badis University—Mostaganem, PO Box 227, Route nationale N° 11, Kharrouba, 27000, Mostaganem, Algeria.
Echinodermata Leptopentacta new genus Mostaganem Algeria north-west Atlantic bycatch

Abstract

The genus Leptopentacta H.L. Clark, 1938 is here reviewed and restricted to include only the type species and related tropical Pacific forms, while a new genus Paraleptopentacta is erected to accommodate the Mediterranean and some north-west Atlantic species, formerly assigned to Leptopentacta. Paraleptopentacta n. gen. is characterized by a calcareous ring usually without posteriorly forked radial plates, in combination with body wall ossicles as an external layer of baskets (sometimes absent) and an inner layer of smooth (in one species knobbed), single-layered, multilocular plates, without a reticulum, as opposed to Leptopentacta H.L. Clark, 1938, which always has forked tails to the radial plates and ossicles as an external layer of rosettes and/or baskets and an inner layer of multi-layered or often reticulated scales/plates. A key separating both the genera and their species is provided. In addition, a first record of P. tergestina n. comb. (Sars, 1859), based on individuals collected as bycatch by a commercial benthic trawler in the Mostaganem region, north-west Algeria, is briefly described and its in vitro behavior noted.

 

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