Tanaidacea: Families

Kim Larsen

Neotanaidae Lang, 1956

Neotanaidae Lang, 1956b: 477.

Neotanaiden Scheoske, 1977: 185.

Description. Body shape semicylindrical, dorsoventrally flattened, or cylindrical. Head, eye lobes only without visual elements. Antennule (antenna 1) uniramous, with more than five articles. Antenna (antenna 2), with more than 6 articles; squama absent. Mouthparts reduced in males. Mandible, palp absent; lacina mobilis on both right and left mandible; setal row present; molar broad. Labium with one pair of lobes, articulated, or with three pairs of lobes, partly articulated. Maxillule (maxilla 1), with two endites; palp absent. Maxilla (maxilla 2) well developed. Maxilliped, coxa present; basis not fused; endites not fused, narrower than basis. Epignath large, with two evenly sized articles.

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 present; dactylus long, straight. Pereopod 4 as long as pereopods 5 and 6, dactylus not reduced. Pereopods 4 to 6, coxa present; dactylus and terminal seta not fused. Marsupium formed by four pairs of oostegites.

Pleon with five developed pleonites. 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 two articles, or with one article.

Generic composition. Carololangia Gardiner, 1975; Herpotanais Wolf, 1956; Neotanais Beddard, 1886; Venustrictus Gardiner, 1975.

Remarks. Remarks. A relict family exclusively found in deep water. Considered to be the link between the Apseudomorpha and Tanaidomorpha.

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