Warregoensis, King & Stringer & Leijs, 2023

King, Rachael A., Stringer, Danielle N. & Leijs, Remko, 2023, Carnarvonis gen. nov. and Warregoensis gen. nov.: Two New Genera and Species of Subterranean Amphipods (Crangonyctoidea: Chillagoeidae) Described from North-eastern Australia, Records of the Australian Museum (Rec. Aust. Mus.) 75 (4), pp. 447-457 : 452

Warregoensis gen. nov.

urn:lsid:zoobank.org:act:5B239C3B-3E9D-4CB2-AB23-9D139C0AE8B2

Type species. Warregoensis lowryi sp. nov.

Diagnosis. Body laterally compressed, not vermiform. Eyes absent. Antenna 1 longer than antenna 2, accessory flagellum of two articles. Antenna 2 flagellum shorter than peduncle, calceoli absent. Mandibular palp of 3 articles. Labium (lower lip) lacking inner lobes. Coxae 1–4 distinctly longer than coxae 5–7; coxa 1 distinctly shorter than coxae 2–3; coxa 4 with small but distinct excavated corner on the posterior margin. Gnathopods 1–2 large (propodus as large or larger than head length), not sexually dimorphic; gnathopod 2 propodus slightly longer than in gnathopod 1; gnathopods 1–2 propodus lateral face with distinct excavation above and parallel to palm margin, palm margins crenulate and with 2 excavations, without robust setae along palm margin, with rows of 3 mesial (inner) and 2–3 lateral (outer) robust setae either side of palm corner (where dactyl fits to the propodus). Pereopod 6 and 7 similar lengths, bases narrow (close to 2 times as long as wide). Coxal gills on pereopods 2–7, sternal gills on thoracic segments 2–6, slender, around ½ length of coxal gills. Uropod 3 outer ramus of 1 article, inner ramus absent. Telson cleft to ⅓ depth, with apical setae.

Etymology. Named for the Warrego River Basin where the type specimens of Warregoensis lowryi sp. nov. were collected. Gender: masculine.

Remarks. Warregoensis gen. nov. can be clearly identified from the large overall size of the adult animals (6.2 mm vs 4.5 mm for Carnarvonis katjae sp. nov.), the large gnathopods 1–2, and crenulations of the palm margin in gnathopods 1–2, telson cleft to ⅓ depth, and pereopod 5–7 bases narrow (close to 2 times as long as wide).