Tanaidacea: Families

Kim Larsen

Metapseudidae Lang, 1970 Meta.rtf.

Metapseudidae Lang, 1970: 603.

Parametapseudidae Bacescu, 1977: 9.

Description. Body shape semicylindrical, dorsoventrally flattened, or cylindrical. Head, eye present. Antennule (antenna 1) biramous. Antenna (antenna 2), with more than 6 articles; squama present, or reduced. Mouthparts well developed, functional in both sexes. Mandible, palp present, comprised of three articles; lacina mobilis on both right and left mandible; setal row present; molar broad. Labium with one pair of lobes, articulated. Maxillule (maxilla 1), with two endites; palp biarticulated, palp with more than two setae or with two terminal setae. Maxilla (maxilla 2) well developed. Maxilliped, coxa present; basis not fused; endites not fused, narrower than basis. Epignath large, reniform, with two unevenly sized articles.

Pereonite 1 not reduced, at least three times wider than pereopod basis diameter. Cheliped, attachment directly to ventral cephalothorax surface; exopod present; carpus with few or no long plumose setae. Pereopods 1 to 3, coxae present. Pereopod 1, without plumose setae on distal articles; coxa extended into acute spine, or not extended into acute spine; ischium present; dactylus short, curved. Pereopod 4 as long as pereopods 5 and 6, dactylus not reduced. Pereopods 4 to 6, dactylus and terminal seta not fused. Marsupium formed by five pairs of oostegites.

Pleon with five developed pleonites, or with three free and two reduced or fused pleonites, or with all pleonites fused with pleotelson. Pleopods biramous; male pleopods well developed; female pleopods well developed. Uropods present; protopod without curved spiniform process; endopod with more than six articles; exopod with more than two articles.

Generic composition. Apseudomorpha Miller, 1940; Calozodion Gardiner, 1973; Cryptapseudes Bacescu, 1976; Curtipleon Bacescu, 1976; Cyclopoapseudes Menzies, 1953; Julmarichardia Gutu, 1989; Metapseudes Stephensen, 1927; Pseudoapseudomorpha Gutu, 1991; Synapseudes Miller, 1940.

Remarks. Remarks. Very heterogenic taxon. Shallow-water family.

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