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Issue: Vol. 4312 No. 2: 29 Aug. 2017
Type: Article
Published: 2017-08-29
DOI: 10.11646/zootaxa.4312.2.3
Page range: 259–276
Abstract views: 71
PDF downloaded: 1

Three new species of the genus Ischnomesus (Isopoda: Asellota: Ischnomesidae) from Brazilian deep sea

Departamento de Oceanografia, Museu de Oceanografia Prof. Petrônio Alves Coelho. Laboratório de Carcinologia. Cidade Universitária, Rua da Arquitetura, Universidade Federal de Pernambuco, S/N, CEP 50670-901, Recife, Pernambuco, Brazil.
Departamento de Oceanografia, Museu de Oceanografia Prof. Petrônio Alves Coelho. Laboratório de Carcinologia. Cidade Universitária, Rua da Arquitetura, Universidade Federal de Pernambuco, S/N, CEP 50670-901, Recife, Pernambuco, Brazil.
Crustacea Asellota Taxomomy Marine benthos New species South Atlantic

Abstract

Three new species of genus Ischnomesus are described from three Brazilian sedimentary Basins: Alagoas-Sergipe, Espírito Santo and Campos. Ischnomesus hirsutus sp. nov. was found at depths between 1445 m and 3000 m in Alagoas-Sergipe Basin and Espírito Santo Basin. This species is characterized by having pereonite I with 1 pair of anterolateral small pedestal spines, pereonites I–IV with a pair of anterodorsal pedestal setae and pleotelson with lateral fields bulge Ischnomesus longiseta sp. nov. was found between 400 and 1000 m, on the upper slope in Alagoas-Sergipe Basin and Espírito Santo Basin, and is characterized by having the pereonites without spines or tubercles, but covered with long simple setae, pleotelson with 5 lateral simple setae, without spines or tubercles. Ischnomesus wilsoni sp. nov. was found on the upper slope between 750 and 830 m in Espírito Santo Basin and Campos Basin. This species has the body entirely ornamented with pedestal spines. This is the first record of the family Ischnomesidae for Brazilian waters.

 

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