Tanaidacea: Families

Kim Larsen

Pseudotanaidae Sieg, 1976

Tanaidae Lang, 1949: 5 (in part).

Paratanaidae Lang, 1967: 343 (in part).

Pseudotanaidae Sieg, 1976: 185.

Paseudotanaididae Larsen & Wilson, 2002.

Description. Body shape cylindrical. Head, eye present, or absent. Antennule (antenna 1) uniramous, with four to five articles. Antenna (antenna 2), with 5 or 6 articles; squama absent. Mouthparts reduced in males. Mandible, palp absent; lacina mobilis only on left mandible; setal row absent; molar broad, or pointed. Labium with one pair of lobes, not articulated. Maxillule (maxilla 1), with one endite; palp uniarticulated, palp with two terminal setae. Maxilla (maxilla 2) reduced. Maxilliped, coxa absent; basis fused; endites fused or not fused, narrower than basis. Epignath small, falciform, uniarticulated, with few setae at apex or completely smooth.

Pereonite 1 reduced to a band as wide as pereopod basis diameter, or not reduced, at least three times wider than pereopod basis diameter. Cheliped, attachment via sidepiece (sclerite); exopod absent; carpus with few or no long plumose setae. Pereopods 1 to 3, coxae absent. Pereopod 1, without plumose setae on distal articles; ischium present; dactylus long, curved with spinning glands at tip. Pereopod 4 as long as pereopods 5 and 6, dactylus not reduced. Pereopods 4 to 6, coxa present; dactylus and terminal seta not fused, or fused. Marsupium formed by one pair of oostegites, or four pairs of oostegites.

Pleon with five developed pleonites. Pleopods biramous; male pleopods well developed; female pleopods well developed, or with simple setae only, or reduced. Uropods present; protopod without curved spiniform process; endopod with two articles; exopod with two articles, or with one article.

Generic composition. Cryptocope G. O. Sars, 1882; Cryptocopoides Sieg, 1976; Curtichelia Kudinova-Pasternak, 1987; Iungentitanais Sieg, 1977; Latitanais Kudinova-Pasternak, 1987; Mystriocentrus Bird & Holdich, 1989; Paraiungentitanais Sieg, 1977; Parapseudotanais Bird & Holdich, 1989; Pseudotanais G. O. Sars, 1882.

Remarks. Remarks. Members exclusively found in deep water (one species found shallower than 200 m).

Cite this publication as: 'Larsen, K. (2002 onwards). Tanaidacea: Families. Version 1: 2 October 2002. http://crustacea.net'.