A phylogenetic review of the genus Hexabathynella Schminke, 1972 (Crustacea, Malacostraca, Bathynellacea): with a description of four new species Author Cho, Joo-Lae Author Schminke, Horst Kurt text Zoological Journal of the Linnean Society 2006 2006-05-09 147 1 71 96 https://academic.oup.com/zoolinnean/article-lookup/doi/10.1111/j.1096-3642.2006.00215.x journal article 10.1111/j.1096-3642.2006.00215.x 0024-4082 GENUS HEXABATHYNELLA SCHMINKE, 1972 Diagnosis: Parabathynellid. Body elongated and cylindrical. Antennule six-segmented. Second antennular segment sexual dimorphic. Antenna fivesegmented. Labrum flat. Incisor process of mandible consisting of five spines. Maxilla three-segmented. Thoracopod VII absent. Exopod of thoracopod I onesegmented; that of thoracopods II–VI two-segmented. Male thoracopod VIII massive, with three-lobed penial region, basipod bearing a seta and being drawn out in a chitinous projection, with elongated endopod and triangular exopod. With two setae at the base of the tip. Sympod of uropod with spines: distal spine always longer and thicker than other spines. Inner terminal seta of uropodal exopod shorter than outer one. Furcal rami with three spines. Anal operculum convex. Type species: Hexabathynella pauliani Delamare Deboutteville, 1953 .