Arcitalitridae fam. nov.

Type genus. Arcitalitrus Hurley, 1957 .

Included genera (15). Albidiator Lowry & Myers, 2019a; Arcitalitrus Hurley, 1975; Austrotroides Friend, 1982; Calviator Lowry & Myers, 2019a; Fleuriella Lowry, Myers & Nakano, 2019; Hermaniator Lowry & Myers, 2019a; Insulariator Lowry & Myers, 2019a; Keratroides Hurley, 1975; Lutruwitiator Lowry & Myers, 2019a; Myanmarorchestia Hou, 2017; Mysticotalitrus Hurley, 1975; Richardsoniella Lowry, Myers & Nakano, 2019; Solitroides Suzuki, Nakano, Nguyen, Nguyen, Morino & Tomikawa, 2017; Swaziator Lowry & Myers, 2019a; Talitriator Methuen, 1913 .

Category. Femipods and semi-mascupods.

Ecological type. Riparian-hoppers, field-hoppers, forest-hoppers and ground-hoppers.

Distribution. Australia and Papua New Guinea; South Africa; Atlantic South America and Indonesia and Malaysia.

Diagnostic description. Antenna 1 long, reaching to at least midpoint of peduncular article 5 of antenna 2 or short, not reaching midpoint of peduncular article 5 of antenna 2. Maxilliped palp article 2 without distomedial lobe; article 4 small, distinct. Gnathopod 1 posterior margin of merus, carpus and propodus each without palmate lobes or posterior margin of merus, carpus and propodus each with palmate lobes or posterior margin of some but not all merus, carpus and propodus with palmate lobes; propodus subrectangular, enlarged subrectangular or subrectangular, tapering distally. Gnathopod 2 mitten-shaped. Pereopods 3–7 simplidactylate. Pereopod 4 dactylus basidactylate. Pereopod 5 dactylus not inflated. Pereopod 6 subequal in length or shorter than pereopod 7. Epimera 1–3 slits absent. Uropods 1–2 rami without apical spear-shaped setae. Uropod 1 male exopod not sexually dimorphic; exopod without marginal robust setae. Uropod 3 ramus shorter than peduncle. Telson with 1–9 robust setae per lobe.