Tanais Latreille, 1831

Tait, Valerie K., Conlan, Kathleen E. & Dittmann, Sabine, 2021, Tanaididae (Crustacea, Tanaidacea, Tanaidomorpha, Tanaidoidea) on a Floating Dock, West Beach, Adelaide, South Australia: Introduced or Indigenous?, Zootaxa 4996 (1), pp. 83-125 : 86

Genus Tanais Latreille, 1831

Type species. Tanais dulongii ( Audouin, 1826)

Genus diagnosis: (from Edgar 2008, modifications in bold). Four pleonites present plus pleotelson. Pleonites 1 and 2 carrying a transverse dorsal row of plumose setae. Antennule with four or five articles, first article at least 2.5 times length of second article in mature females, terminal articles with four to seven aesthetascs. Antenna with seven or eight articles, article 2 longer than wide, last two or three articles small. Maxillule endite with seven ( T. nuwalianensis Tzeng & Hsueh, 2014 ) or eight large terminal spiniform setae, palp with several long setae. Labium outer lobe with rounded terminal process, fused or not fused. Pereopod 1 coxa without anterior bulge. Pleopod basal articles with zero ( T. pongo Bamber, 2005 ) to four setae ( T. tinhauae Bamber & Bird, 1997 ) on medial margin and seven to more than twenty ( T. pongo ) plumose setae on the lateral margin, endopod medial margin with about ten to twenty plumose setae. Pleopod 3 similar or slightly smaller than pleopods 1 and 2. Uropod with three to five ( T. pongo ) segments, terminal segment normal. Sexual dimorphism low, observed in chelipeds, antennules, and antennae.