Open Access Open Access  Restricted Access Subscription or Fee Access

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

ELINAI SANTOS-SILVA, JESSER F. SOUZA-FILHO

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.

 


Keywords


Crustacea, Asellota, Taxomomy, Marine benthos, New species, South Atlantic

Full Text:

PDF (2MB)

References


Araújo-Silva, C.L. & Larsen, K. (2012) Tanaidacea (Tanaidacea: Crustacea) from Brazil. IV. A new genus and two new species from the family Leptocheliidae. Zootaxa, 3523, 1–19.

Barnard, K.H. (1920) Contributions to the crustacean fauna of South Africa. No. 6.- Further additions to the list of marine Isopoda. Annals of the South African Museum, 17 (5), 319–438, pls. XV–XVII.
https://doi.org/10.5962/bhl.part.22318

Beddard, F.E. (1886) Report on the Isopoda collected by the H.M.S. Challenger during the years 1873–1876. Part 2. Report of the Voyage of the H.M.S. Challenger, 17, 1–178.

Birstein, J.A. (1960) The family Ischnomesidae (Crustacea, Isopoda, Asellota) in the north-western part of the Pacific and the problem of amphiboreal and bipolar distribution of the deep sea fauna. Zoologik Zhurnal, SSSR, 39, 3–28.

Birstein, J.A. (1963) Deep Sea Isopod Crustaceans of the Northwest Pacific Ocean. Institute of Oceanology of the USSR, Akademii Nauk, Moscow, 213 pp.

Birstein, J.A. (1971) Fauna of the Kurile-Kamchatka Trench. Additions to the fauna of isopods (Crustacea, Isopoda) of the Kurile-Kamchatka Trench. Part II. Asellota 2. Trudy Instituta Okeanogiya, Akademiya Nauk SSSR, Moscow, 92, 162–238.

Brandt, A., Stüven, J.K., Caurant, C. & Elsner, N.O. (2015) An account of the Ischnomesidae (Peracarida, Isopoda) from the Kuril–Kamchatka Trench and abyssal plain (Northwest Pacific) with the description of two new species. Deep-Sea Research II, 111, 279–293.
https://doi.org/10.1016/j.dsr2.2014.08.014

Brökeland, W. & Brandt, A. (2004) Two new species of Ischnomesidae (Crustacea: Isopoda) from the Southern Ocean displaying neoteny. Deep-Sea Research II, 51 1769–1785.
https://doi.org/10.1016/j.dsr2.2004.06.034

Chardy, P. (1974) Compléments à l’étude systématique des Ischnomesidae (Isopodes Asellotes) de l’Atlantique. Description de quatre espèces nouvelles. Bulletin du Muséum National d’Histoire Naturelle, 257, 1537–1552.

Coleman, C.O. (2003) “Digital inking”: How to make perfect line drawings on computers. Organism, Diversity and Evolution, 3 (Electronic Supplement 14), 1–14.
https://doi.org/10.1078/1439-6092-00081

Cunha, M.R. & Wilson, G.D.F. (2006) The North Atlantic genus Heteromesus (Crustacea: Isopoda: Asellota: Ischnomesidae). Zootaxa, 1192, 1–76.

Gurjanova, E. (1932) Tableaux analytiques de la faune de l’URSS, publiés par l’Institut Zoologique de l’Académie des Sciences. Les isopodes des mers arctiques. Éd. l’Institut Zoologique de l’Académie des Sciences URSS, Leningrad, 181 pp.

Hansen, H.J. (1916) Crustacea Malacostraca III. The order Isopoda. The Danish Ingolf Expedition, 3 (5), 1–262.

Kavanagh, F.A., Frutos, I. & Sorbe, J.C. (2015) Ischnomesus harrietae sp. nov., a new benthic asellote (Crustacea: Isopoda: Ischnomesidae) from bathyal bottoms of the southern Bay of Biscay. Zootaxa, 3911 (2), 201–217. https://doi.org/10.11646/zootaxa.3911.2.3

Kavanagh, F.A. & Wilson, G.D.F. (2007) Revision of the genus Haplomesus (Isopoda: Asellota: Ischnomesidae) with erection of four new genera. Invertebrate Systematics, 21, 487–535.
https://doi.org/10.1071/IS06031

Kensley, B. (1984) Marine Isopoda of the 1977, 1978, 1979 cruises. Annals of the South African Museum, 93, 213–301.

Kussakin, O.G. (1988) Marine and brackish-water Crustacea (Isopoda) of cold and temperate waters of the Northern Hemisphere. 3. Suborder Asellota 1. Janiridae, Santiidae, Dendrotionidae, Munnidae, Haplomunnidae, Mesosignidae, Haploniscidae, Mictosomatidae, Ischnomesidae. Opredeliteli po Faune SSR, Akademiya Nauk, SSR, 152, 1–501.

Latreille, P.A. (1802) Histoire Naturelle Genrale et Particulière, des Crustacés et des Insectes. Vol. 7. F. Dufart, Paris, 413 pp., pls. 58–66.

Latreille, P.A. (1817) Pénée Penaeus. Nouveau Dictionnaire d’Histoire Naturelle, 25, 152–156.

Menzies, R.J. (1962) The isopods of abyssal depths in the Atlantic Ocean. Vema Research Series, 1, 79–206.

Menzies, R.J. & George, R.Y. (1972) Isopod Crustacea of the Peru–Chile Trench. Anton Bruun Report, 9, 1–124.

Merrin, K. & Poore, G.C.B. (2003) Four new species of Ischnomesidae (Crustacea: Isopoda: Asellota) from off south-eastern Australia. Memoirs of Museum Victoria, 60, 285–307.
https://doi.org/10.24199/j.mmv.2003.60.27

Merrin, K.L. & Poore, G.C.B. (2015) Nomenclatural changes in two families of asellote isopods (Acanthaspidiidae and Ischnomesidae). Zootaxa, 4013 (1), 139–142.
https://doi.org/10.11646/zootaxa.4013.1.10

Richardson, H. (1908) Some new Isopoda of the superfamily Aselloidea from the Atlantic coast of North America. Proceedings of the U.S. National Museum, 35, 71–86.
https://doi.org/10.5479/si.00963801.35-1633.71

Sars, G.O. (1868) Beretning om en i Sommeren 1865 foretagen zoologisk Reise ved Kysterne af Christianias of Christiansands Stifter. Nyt Magazin for Naturvidenskaberne, Christiania, 15, 84–128.

Sars, G.O. (1897) An account of the Crustacea of Norway with short descriptions and figures of all the species. Volume II. Isopoda. Bergen Museum, Bergen, x + 270 pp., 104 pls.

Schultz, G.A. (1979) Two new species of isopod crustaceans in families new to Antarctica (Desmosomatidae and Ischnomesidae). Crustaceana, 37, 133–140.
https://doi.org/10.1163/156854079X00960

Svavarsson, J. (1984) Ischnomesidae (Isopoda) from bathyal and abyssal depths in the Norwegian and North Polar Seas. Sarsia, 69, 25–36.
https://doi.org/10.1080/00364827.1984.10420586

Wolff, T. (1956) Isopoda from depths exceeding 6000 metres. Galathea Report, 2, 85–157.

Wolff, T. (1962) The systematics and biology of bathyal and abyssal Isopoda Asellota. Galathea Report, 6, 7–320.




DOI: http://dx.doi.org/10.11646/zootaxa.4312.2.3

Refbacks

  • There are currently no refbacks.


 
ISSN 1175-5326 (Print Edition) & ISSN 1175-5334 (Online Edition)
Published by Magnolia Press, Auckland, New Zealand