Nothrus C.L. Koch, 1835

Colloff, Matthew J., 2011, A review of the oribatid mite family Nothridae in Australia, with new species of Novonothrus and Trichonothrus from rain forest and their Gondwanan biogeographical affinities (Acari: Oribatida), Zootaxa 3005, pp. 1-44 : 3

Nothrus C.L. Koch, 1835

Nothrus C.L. Koch, 1835

Type species Nothrus palustris C.L. Koch, 1839 Angelia Berlese, 1885

Gymnonothrus Ewing, 1917

The definition of Nothrus by Fujikawa (1999) is comprehensive but does not fully differentiate Nothrus from Novonothrus . Therefore, Nothrus is redefined below.

Apex of rostrum U-shaped, consisting of lateral projections extending anteriomedially and median oval region of lighter cuticle with slit-like median incision. Paired lateral areas of lighter cuticle absent. Prodorsum alveolate. Exobothridial seta present; without alveolus of ex 2 or lateral prodorsal setae. Bothridial seta long, setiform, smooth or sparingly barbed, never flagelliform or strongly recurved. Bothridial rim rounded. Notogastral setae 16 pairs in adult and nymphs; setae h 2 and p 1 occasionally longer than others in adults and immatures. Suprapleural scissure present. Notogaster with lateral or circumdorsal furrows. Hysterosoma typically dorsoventrally flattened. Epimeral plates separated along sternal line in immatures; at least epimeral plates III and IV separated in adults. Genital plates entire, not divided transversely, each with seven setae arranged in median file and two (typically g 4 and g 8) in lateral file. Aggenital setae absent; two pairs of anal setae; three pairs of adanal setae. Epimeral plates I with 3–9 setae; II with 3–6; III with 3–6; IV with 3–7.