Eustigmaeus ottavii, (Berlese, 1910)

Khaustov, Alexander A., 2019, Contribution to systematics of the genus Eustigmaeus (Acari: Stigmaeidae) of Russia, Acarologia 59 (1), pp. 152-173 : 170

ottavii ( Berlese, 1910)

Eustigmaeus gratus ( Kuznetsov, 1978) comb. nov. is characterized by the unique shape and location of callosities (see Fig. 7A in Khaustov 2014), baculiform and sparsely barbed dorsal idiosomal setae, presence of 3 pairs of aggenital setae and almost smooth dorsal idiosomal shields. Such combination (especially shape and location of callosities) of characters is known only in Eustigmaeus ottavii ( Berlese, 1910) redescribed by Stathakis et al. (2016) and in E. isfahanensis Khanjani et al., 2014 . Comparison of specimens of E. gratus from Russia

with description of E. ottavii from Greece do not revealed any sufficient differences between these species. Therefore, I consider Eustigmaeus gratus ( Kuznetsov, 1978) comb. nov. as a junior synonym of E. ottavii ( Berlese, 1910) . Potentially E. isfahanensis also could be a junior synonym of E. ottavii , but examination of the type material of this species is necessary.

Figures

Figure 7 Eustigmaeus bochkovin. sp., male: A – left leg I in dorsal view, B – left leg II in dorsal view, C – left leg III in dorsal view, D – left leg IV in dorsal view.