Arcozetes bicuspidatus HAMMER, 1958

Mahunka, S., 2006, Oribatid Mites (Acari: Oribatida) From Venezuela, Ii. New Or Rare Species From Montane Forests, Acta Zoologica Academiae Scientiarum Hungaricae 52 (3), pp. 271-286 : 278-279

Arcozetes bicuspidatus HAMMER, 1958

( Figs 19–21 )

The genus, along with its type species, was described by HAMMER (1958) from Argentina (the environs of Salta). Both the description and the drawing are on the whole correct, however, having studied the holotype, some minor additions are needed .

4 I am not sure whether the genus Synoppia (BALOGH et MAHUNKA, 1969) is fully synonymous with the genus Sternoppia . Further investigation is necessary.

Lamellae are broad, almost touching, as far as I can see there is no translamella between them. The inner apex is long, the outer one is dentiform. The lamellar setae estends from a hollow near the outer apex, the insertion point being on the ventral side. The outer margin of tutorium is dentate ( Fig. 20 ). The distal end of sensillus is strongly narrowed, almost setiform ( Fig. 19 ). This feature is not clearly observable on the drawing, although it is one of the most significant features of both A. bicuspidatus and the species described below.

Figures

Figs 15–22. Distinguishing characters of Acrozetes species. 15–18 = Arcozetes rotundatus sp. n.: 15 = body in dorsal view, 16 = rostral part of the podosoma in lateral view, 17 = prodorsum in dorsal view, 18 = sensillus. 19–21 = Arcozetes bicuspidatus HAMMER, 1958: 19 = sensillus, 20 = prodorsum in