Tanaidacea: Families

Kim Larsen

Tanaidae Dana, 1849

Tanaidae Dana, 1849: xxx.

Description. Body shape cylindrical. Head, eye present. Antennule (antenna 1) uniramous, with four to five articles, or uniramous, with less than four articles. Antenna (antenna 2), with 5 or 6 articles, or with more than 6 articles; squama absent. Mouthparts well developed, functional in both sexes. Mandible, palp absent; lacina mobilis on both right and left mandible; setal row present; molar broad. Labium with two pairs of lobes, not articulated. Maxillule (maxilla 1), with one endite; palp biarticulated, palp with more than two setae. Maxilla (maxilla 2) reduced. Maxilliped, coxa present; basis not fused; endites not fused, narrower than basis. Epignath large, reniform, uniarticulated.

Pereonite 1 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 present. Pereopod 1, without plumose setae on distal articles; coxa not extended into acute spine; ischium absent; 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 absent; dactylus and terminal seta fused. Marsupium formed by ovisack.

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

Generic composition. Anatanais Nordenstam, 1930; Archaeotanais, Sieg, 1980; Arctotanais Sieg, 1980; Hexapleomera Dudich, 1931; Monoditanais Sieg, 1980; Pancoloides Sieg, 1980; Pancolus Richardson, 1905; Parasinelobus Sieg, 1980; Protanais Sieg, 1980; Sinelobus Sieg, 1980; Singularitanais, Sieg, 1980; Synaptotanais Sieg, 1980; Tanais Latreille, 1831; Zeuxo Templeton, 1840; Zeuxoides Sieg, 1980.

Remarks. Remarks. Members exclusively found in shallow water.

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