Tanaella quintanai, a new deep-water tanaellid (Crustacea: Peracarida: Tanaidacea) from the Colombian Caribbean Coast, with a key to the species of the genus Tanaella Norman & Stebbing, 1886

Andrés G Morales-Núñez; Néstor E Ardila

doi:10.7717/peerj.7571

Tanaella quintanai, a new deep-water tanaellid (Crustacea: Peracarida: Tanaidacea) from the Colombian Caribbean Coast, with a key to the species of the genus Tanaella Norman & Stebbing, 1886

PeerJ. 2019 Sep 24:7:e7571. doi: 10.7717/peerj.7571. eCollection 2019.

Authors

Andrés G Morales-Núñez¹, Néstor E Ardila²

Affiliations

¹ NSF-CREST Center for the Integrated Study of Coastal Ecosystem Processes and Dynamics in the Mid-Atlantic Region (CISCEP), Department of Natural Sciences, University of Maryland Eastern Shore, Princess Anne, Maryland, United States of America.
² División de Biología Marina, ECOMAR Consultoría Ambiental, Bogotá, Colombia.

Abstract

A new tanaidacean, Tanaella quintanai sp. nov., is described based on specimens collected from depths of 1,598 to 2,853 m during 2014-2015. The new species appears to be most closely related to the western Atlantic species, T. kroyeri and T. mclellandi. Tanaella quintanai can be separated from the two former, as well as from the other members of the genus by a combination of characters, including (1) a labium with apical lobe bearing one blunt seta (2) a cheliped with the inner margin of the dactylus bearing a sub-proximal bipinnate seta, (3) pereopods 1-3 with basis having sub-dorsoproximal and sub-ventroproximal margins setulose, (4) pereopods 4-6 with basis having ventroproximal margin setulose, (5) pereopods 4-6 with unguis bearing two parallel rows of small setules, and (6) a pleotelson as long as pleonites 1-5 combined. A key separating the currently recognized species of Tanaella is presented.

Keywords: Caribbean region; Colombia; Deep-sea; Tanaella quintanai; Tanaellidae; Tanaidacea.

Grants and funding

This research was supported by NSF CREST-CISCEP (Center of Research Excellence in Science and Technology-Center for the Integrated Study of Coastal Ecosystem Processes and Dynamics in the Mid-Atlantic Region) grant No. 1036586. There was no additional external funding received for this study. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.