Pseudotritia ardua, Willmann, 1920

van der Hammen, L., 1959, Berlese's Primitive Oribatid Mites, Zoologische Verhandelingen 40, pp. 1-93 : 36-37

Pseudotritia ardua (C. L. Koch, 1841)

Hoplophora ardua C. L. Koch , 1841, fasc. 32 (15).

Tritia lentula , Berlese, 1887a, fasc. 36 (3); 1896b, p. 20.

Phthiracarus canestrinii Michael , 1898, p. 81.

Phtiracarus canestrinii , Berlese, 1913a, p. 55.

Tritia ardua , Sellnick, 1923, p. 12, figs. 1, 12, 23, 24.

Oribotritia ardua , Sellnick, 1928, p. 39.

Pseudotritia ardua , Jacot, 1930, p. 243, pl. 38 figs. 44-51; Märkel, 1958, p. 486, fig. 5.

Oribotritia loricata , Willmann, 1931, p. 194, fig. 358.

Berlese's figure of Tritia lentula (non lentula C. L. Koch ) demonstrates that the species has one lateral ridge on the aspis, and a slightly thickened sensillus; it is therefore identical with Pseudotritia ardua (C. L. Koch) , and different from the related species P. duplicata Grandjean (cf. Märkel, 1958).

In the Berlese Collection I studied two slides (nos. 215/41, 42) with speciniens from Torino that are ardua indeed.

I remark that Michael's arduus is duplicata , whilst he gave the name canestrinii to our ardua . Berlese (1913a) apparently accepted this opinion, for at that time he mentioned arduus as well as canestrinii . Probably both species are present in the Collection, because Lombardini (1936, p. 50) mentioned both Tritia ardua and Tritia lentula (Michael's canestrinii ) in his Catalogue.