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.
Highlights
The Tanaidacean fauna from Colombia has received minimal attention far
This publication is the second in a series dealing with the Tanaidacea from the Colombian Caribbean region, and it presents a description of a new species of Tanaella Norman & Stebbing, 1886
With the description of new Colombian species, seven of 18 species of Tanaella (Table 2) are known to be from the western Atlantic Ocean; among them, Tanaella ochracea from the western tip of Greenland, three (T. busteri, T. mclellandi, and T. prolixcauda) from Gulf of Mexico, T. kroyeri from off Brazil, T. unisetosa from the tip of Argentina, and T. quintanai sp. nov., which represents the first species of the genus described from the Caribbean (Fig. 10)
Summary
Morales-Núñez & Ardila (2018) reported the first record for the family Tanaellidae Larsen & Wilson, 2002 in the Colombian Caribbean region. Morales-Núñez, MoralesRuiz & Ardila (2017) described a new sphyrapodid tanaidacean, Sphyrapus caribensis Morales-Núñez, Morales-Ruiz & Ardila, 2017, reported Kudinopasternakia siegi (Viskup & Heard, 1989), and presented detailed information about the species of tanaidaceans that had been previously reported in the Caribbean and Pacific Colombian coasts. This publication is the second in a series dealing with the Tanaidacea from the Colombian Caribbean region, and it presents a description of a new species of Tanaella Norman & Stebbing, 1886. 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.
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