Eurhynchoribates, Miko, Ladislav, 2016

Miko, Ladislav, 2016, Oribatid mites (Acarina, Oribatida) from French Guyana: review of the genus Rhynchoribates and description of three new species, Zootaxa 4061 (2), pp. 131-145 : 134

Rhynchoribates Grandjean, 1929

Differential diagnosis (as compared to Eurhynchoribates n. gen.). Prodorsal surface with or without pattern or network of ridges, but never with U-shaped tectopedial fields. Rostrum variously developed, with or without teeth, if teeth present, then often concentrated in vicinity of distal end of rostrum not far from insertion of ro. Setae in and le usually inserted freely on the surface of prodorsum, only rarely on sclerotised lamellar and interlamellar structures. Setae in positioned more axially than le and le often close to anterior margin of notogaster and to bothridia. Anterior margin of notogaster usually with 2 pairs of tubercles or with humeral tubercles and axial arched ridge, with notogastral cristae developed. Pedotectum II absent, epimeral seta 3c is inserted on small blade lateral to ventrosejugal furrow. 7 pairs of genital setae. Adanal setae ad2 not significantly shifted posteriad, distances ad1–ad2 and ad2–ad3 subequal. Only seta ad1 often modified and positioned postanally, ad2 positioned laterally to anal opening and developed similarly to ad3. Lyrifisssures iad usually in adanal position, close to anal opening and aligned with its lateral margins; in rare cases distant from anal opening, oblique and converging posteriad (inverse apoanal).