Genus Billibathynella Cho, 2005 Type species Billibathynella humpreysi Cho, 2005 Other species B. wolframnoodti, B. ilgarariensis Hong and Cho, 2009 Amended diagnosis (after Hong & Cho, 2009) Parabathynellidae body elongated and cylindrical. Antennula seven-segmented. Antenna seven-segmented. Labrum flat with numerous teeth (more than 20) on free margin. Molar process of mandible with more than 11 spines. Mandibular palp three times as long as wide. Maxilla four-segmented. Thoracopods I–VII with exopod of six or more segments. Male thoracopod VIII almost rectangular, longer than wide; protopod protruded at inner distal corner; epipod large, triangular, its distal part covering penial region of protopod; basipod without setae, inner margin of basipod drawn out into projection. Uropod with numerous spines on sympod; endopod with one or two distal spines, two plumose setae near base, and a protrusion on disto-outer margin, inner spines variable in number; exopod with numerous setae (more than 12). Anal operculum flat to slightly concave. Furcal rami elongated, with two large distal spines and numerous spines (more than 12) on inner margin.

Published as part of Perina, Giulia, Camacho, Ana I., Morgan, Liesel, Floeckner, Stephanie & Guzik, Michelle T., 2025, Morphological and molecular description of ten new species of a new genus of Parabathynellidae (Bathynellacea, Crustacea) from the Pilbara region, Western Australia, pp. 1-103 in Zootaxa 5712 (1) on page 28, DOI: 10.11646/zootaxa.5712.1.1, http://zenodo.org/record/17884411