Parabathynellidae Noodt, 1965

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, Zootaxa 5712 (1), pp. 1-103 : 28

Family Parabathynellidae Noodt, 1965

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.

Genus Brevisomabathynella Cho, Park & Ranga Reddy, 2006

Type species Brevisomabathynella cooperi Cho, Park and Ranga Reddy, 2006

Other species B. cunyuensis Cho, Park and Ranga Reddy, 2006 ; B. magna , B. changjini , B. clayi , B. uramurdahensi , B. jundeeensis , B. parooensis , B. eberhardi , B. leijsi , B. hahni Cho and Humphreys, 2010 .

Amended diagnosis (after Cho & Humphreys, 2010)

Body elongated or short and cylindrical or fat-bellied. Antennula seven-segmented. Antenna five-segmented. Labrum flat with numerous teeth on free margin. Mandibular palp one-segmented with one or three setae. Maxilla four-segmented. Thoracopods I–VII with exopod of two and more (2–12) segments. Male thoracopod VIII almost rectangular or oval, longer than wide; protopod protrudes at inner distal corner; epipod large, triangular, distal part covering penial region of protopod; basipod without setae, inner margin of basipod drawn out into projection. Uropod with numerous (7–20) spines on sympod; endopod with two terminal spines, one or two plumose setae near base, three terminal setae, protrusion on disto-outer margin, inner spines variable in number; exopod with numerous setae, without basiventral seta.