Marine Biodiversity

, Volume 48, Issue 2, pp 915–925 | Cite as

A new genus of Tanaidacea (Peracarida, Typhlotanaidae) from the Atlantic slope

  • Juliana L. SegadilhaEmail author
  • Marta Gellert
  • Magdalena Błażewicz
Biodiversity of Icelandic Waters
Part of the following topical collections:
  1. Biodiversity of Icelandic Waters


Two new species of deep-sea Tanaidacea (Aremus islandica n. sp. and A. brasilica n. sp.) were collected in the SW and N Atlantic during the scientific cruises organized within the HABITATS and IceAGE (Icelandic Animals Genetic and Ecology) initiatives in 2009 and 2011, respectively. Both species fit well to the current definition of Typhlotanaidae, but differ from the other members of the family by the striking feature of absence of the pleopods (one pair of pinnate setae on each pleonite ventrally), therefore they were accommodated to the newly erected genus – Aremus n. gen.; the new genus lacks the prickly tubercles on the carpus of pereopods 4–6, although it has three distinct serrated spines that makes it similar to four typhlotanaid genera, namely: Meromonakantha, Paratyphlotanais, Hamatipeda and Obesutanais. However, the morphology of the body does not correspond to the typical Meromonakantha neither to short body of Obesutanais. Furthermore Paratyphlotanais and Hamatipeda differ from the new genus on the spines form, in which the first one has long serrated spines and the second has hook-like spines. Both new species can be distinguished by (1) length of the ventrodistal seta on cheliped carpus, (2) length of dorsodistal seta on carpus of pereopods 1–3 and (3) length of the uropodal endopod. The systematics of the typhlotanaids without prickly tubercles on the pereopods 4–6 is briefly discussed.


Tanaidomorpha Taxonomy IceAGE HABITATS Iceland Brazil 



We appreciate Captain Michael Schneider, the crew of R/V Meteor and the scientists participating in IceAGE Program as well as pickers and sorters for their valuable help on and off board. The authors would also like to thank the Petrobras Company, which coordinated the fieldwork and made the material from Brazil available; to Dr. David Drumm for English revision; and to M.Sc. Maria Isabel Sarvat de Figueiredo for the assistance with photos.


This study was funded by National Science Center (grant No. 2014/13/B/NZ8/0402) and CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (grant No. 88881.133638/2016-01).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All applicable international, national, and/or institutional guidelines for the care and use of animals were followed by the authors.

Field study

Permits and approval of field or observational studies have been obtained by the authors.


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Copyright information

© Senckenberg Gesellschaft für Naturforschung and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Juliana L. Segadilha
    • 1
  • Marta Gellert
    • 2
  • Magdalena Błażewicz
    • 2
  1. 1.Departamento de InvertebradosLaboratório de Carcinologia, Museu Nacional (MN/RJ)Rio de JaneiroBrasil
  2. 2.Department of Invertebrate Zoology and HydrobiologyUniversity of ŁódźŁódźPoland

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