Pseudomesus Hansen, 1916

Kaiser, Stefanie & Brix, Saskia, 2007, Two new species of the genus Pseudomesus Hansen, 1916 (Isopoda, Asellota) from the Southern hemisphere: Pseudomesus pitombo sp. nov. and Pseudomesus satanus sp. nov., Zootaxa 1658, pp. 21-38 : 23

publication ID	https://doi.org/10.5281/zenodo.274018
publication LSID	lsid:zoobank.org:pub:864193EF-55C7-4A9A-A58E-1879095B4C4F
persistent identifier	https://treatment.plazi.org/id/BE0F0011-FFEE-FFA8-FF3A-FE54FACAFC6C
treatment provided by	Plazi (2016-04-07 05:52:32, last updated 2017-02-08 11:50:14)
scientific name	Pseudomesus Hansen, 1916
status

Treatment

Pseudomesus: Hansen, 1916: 72 ; Birstein, 1963: 65; Chardy, 1974: 412; Svavarsson, 1984: 44. Type species: Pseudomesus brevicornis Hansen, 1916

Diagnosis. Body elongated (more than 5.5 times longer than width of pereonite 2). Pereonites 5–7 of nearly same size. Ischium of posterior pereopods dorsally with anteriorly directed cuticular hook. Carpus of pereopod 1 ventrally with minimum number of three composed setae standing in row. Pleotelson enlarged, dorsally inflated. Uropods uniramous, not extending beyond posterior margin of pleotelson, inserting closely to anus valves; endopod extremely short and nearly bulbous. Sexual dimorphism strongly developed (male: bilateral bulges on the cephalothorax; robust, setose antenna; pleotelson with posterolateral spines; pereopods 5–7 with long natatory setae) (modified after Hansen, 1916; Svavarsson, 1984; Wägele, 1989).

Species composition ( Table 1). Pseudomesus bispinosus Chardy, 1974 ; Pseudomesus brevicornis Hansen, 1916 ; Pseudomesus pitombo sp. nov.; Pseudomesus satanus sp. nov.; Pseudomesus similis Birstein, 1963 .

References

Birstein, J. A. (1963) Deep-sea isopod crustaceans of the northwestern Pacific Ocean. Institute of Oceanology of the U. S. S. R., Akademii Nauk: Moscow, 213 pp. [Russian with English summary]

Chardy, P. (1974) Deux especes nouvelles d`isopodes asellotes recoltees en Mediterranee profonde. Vie et Milieu, 24 (2 ser. B), 409 - 420.

Hansen, H. J. (1916) Crustacea Malacostraca: The order Isopoda. Danish Ingolf Expedition, 3 (5), 1 - 262, plates 1 - 16.

Svavarsson, J. (1984) Description of male of Pseudomesus brevicornis Hansen, 1916 (Isopoda, Asselota, Nannoniscidae) from the Norwegian Sea. Sarsia, 69, 37 - 44.

Wagele, J. - W. (1989) Evolution und phylogenetisches System der Isopoda. Stand der Forschung und neue Erkenntnisse. Zoologica, 140, pp. 262.