Gastronyssini Fain, 1959

Bochkov, Andre V., Zabludovskaya, Svetlana & Oconnor, Barry M., 2008, Phylogeny and systematics of the endoparasitic astigmatid mites (Acari: Sarcoptiformes) of mammals: families Gastronyssidae, Lemurnyssidae, and Pneumocoptidae, Zootaxa 1951 (1), pp. 1-152 : 37

Tribe Gastronyssini Fain, 1959

Fain 1959a: 4, 1964b: 47, 1972: 71; Fain et al. 1974: 173.

Type genus: Gastronyssus Fain, 1955 .

Diagnosis. ADULTS. Gnathosoma in ventral position, setae subc present, setae elc.p. absent. Gnathosoma ventral, without projections, fused with propodonotal shield forming camerostome. Propodonotal shield with rounded perforate fields in median part. Idiosoma vermiform, 5–6 times longer than wide. Idiosomal dorsum and opisthosomal venter lacking striations. Anterior apices of apodemes I joined with lateral arms of camerostome; sternal apex and distal ends of anterior and posterior apodemes of coxal fields II fused together in median part of propodosoma forming closed coxal fields I–II; apodemes III fused to each other; apodemes IV free. Median transverse sclerite absent. Median sclerotization of idiosomal venter absent. Coxal fields I without membranous posterior projections. Folds posterior to coxal fields II absent. Coxal fields III–IV slightly sclerotized. Anus situated ventrally. Tarsi 4–7 times shorter than respective tibiae and lacking pretarsi. Trochanters III–IV without ventral folds. Ventral spurs present or absent on genua III–IV. Idiosomal setation (see Table 1): setae c3, h1, and f2 absent; 4a, 4b, g, and ps3 absent in female; se, 1a, 3a, h2 all filiform, h2 as short as other filiform setae; si, c2, 4a, 4b, g, h3, ps2, ps3 all alveoli. Leg setation (see Tables 2–3): setae la I–II, s I– IV, e III–IV, k TIV, and solenidia ω1I–II, ϕIV, and ω 3 I in males absent; Setae d I–IV, cG I–II, mG I–II, vF I–II all filiform, setae d I–IV short; f I–IV, e I–II, r I–IV, w I–IV, g TI–II, k TIII all spur-like. Solenidion ϕIII strongly reduced, represented by small tubercle.

FEMALE. Bursa copulatrix opening terminal. Epigynum fused with distal ends of apodemes III. Median fold without sclerites.

MALE. Pregenital apodeme fused with distal ends of apodemes III. Postgenital shield absent. Setae g situated on apex of aedeagal cone. Adanal shields absent.

JUVENILE STAGES. Larva bearing same idiosomal and leg I–III setae as female. In protonymph setae d IV, w IV, and r IV added on legs IV. In tritonymph setae f IV added on legs IV.

Genera included: type genus only.