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A new deep-sea genus of nannastacidae (Crustacea, cumacea) from the lucky strike hydrothermal vent field (Azores triple junction, mid-atlantic ridge)

Authors
Journal
Marine Biology Research
1745-1000
Publisher
Informa UK (Taylor & Francis)
Publication Date
Volume
4
Issue
3
Identifiers
DOI: 10.1080/17451000801898576
Keywords
  • Systematics
  • Morphology
  • Mid Atlantic Ridge
  • Hydrothermal Vents
  • Deep Sea
  • Cumacea
Disciplines
  • Earth Science
  • Ecology
  • Geography

Abstract

A new cumacean genus and species, Thalycrocuma sarradini gen. et sp. nov., belonging to the family Nannastacidae is described from several sites of the Lucky Strike hydrothermal vent field (Mid-Atlantic Ridge, 37N, 1700 m depth). The new genus differs from others in the family by males lacking exopods on the pereopods 3 and 4 and having an antenna with a five-articulate peduncle and a short flagellum. This is the first cumacean species that could be considered, at the moment, as endemic from hydrothermal vent areas. Data on the accompanying fauna including other cumacean species (Cyclaspis longicaudata, Bathycuma brevirostre, Procampylaspis sp. and Makrokylindrus sp.) and some ecological remarks are included. A key for the currently known genera of the family Nannastacidae is provided and the taxonomic position of some genera is discussed.

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