Oribatella, Banks, 1895

Bayartogtokh, Badamdorj & Ermilov, Sergey G., 2019, Ontogeny of morphological traits in Oribatella palustris Hammer, 1962, with remarks on juveniles of Oribatellidae (Acari: Oribatida), Zootaxa 4717 (1), pp. 85-103 : 100

Key to known larvae of Oribatella

1 Gastronotum with 12 pairs of setae, h 1 well developed; all or most gastronotic setae thin, setiform..................... 2

- Gastronotum with 11 pairs of setae, h 1 absent; all gastronotic setae very broad, leaf shaped................................................................................................ Oribatella nortoni Behan-Pelletier, 2011

2 All gastronotic setae thin, setiform........................................................................ 3

- Gastronotic setae c 1, da, dm and dp very broad, leaf shaped, other setae setiform............................................................................................. Oribatella yukonensis Behan-Pelletier & Walter, 2012

3 Bothridial seta short, shorter than interlamellar seta, clavate.................................................... 4

- Bothridial seta long, nearly as long as interlamellar seta, mostly fusiform, rarely clavate............................. 6

4 Gastronotic setae very long, extending insertions of next two rows of setae; exobothridial seta very long, longer than interlamellar seta.............................................................................................. 5

- Gastronotic setae medium long, extending only setal insertions of next one row; exobothridial seta very short, about ¼ length of interlamellar seta............................................................ Oribatella arctica Thor, 1930

5 Gastronotic seta h 3 medium long, thick, barbed; interlamellar setae short, not reaching rostrum................................................................................................. Oribatella berlesei ( Michael, 1898)

- Gastronotic seta h 3 short, thin, smooth; interlamellar setae very long, extending beyond rostrum................................................................................................ Oribatella calcarata ( Koch, 1835)

6 Bothridial seta fusiform, pointed distally................................................................... 7

- Bothridial seta clavate, rounded distally................................................................... 9

7 Bothridial seta very long, longer than exobothridial seta....................................................... 8

- Bothridial seta much shorter than exobothridial seta......................... Oribatella quadricornuta (Michael, 1880)

8 Prodorsal and gastronotic setae inserted on large tubercle; distance between pair of setae da -da same as that between c 1 – c 1 ........................................................................ Oribatella metzi Behan-Pelletier, 2011

- Prodorsal and gastronotic setae inserted not on large tubercles, but on dorsal shield; distance between pair of setae da -da greater than that between c 1 – c 1 ..................................................... Oribatella sexdentata Berlese, 1916

9 Gastronotic setae very thick, same thickness throughout its length, strongly barbed.............................................................................................. Oribatella pawnee Behan-Pelletier & Walter, 2012

- Gastronotic setae thin, tapered distally, normally barbed.......................... Oribatella superbula ( Berlese, 1904)