The paper deals with the data on species composition, number and complexes of dominating species of Oribatei from 215 nests of Riparia r. riparia L. The ticks were collected in different seasons of a year.

Rotifers of the Lepadella genus (L. astacicola, L. lata, L. branchicola, L. raja, L. nаnа) and the Dicranophorus genus (D. hauerianus) specific for crawfish are found in the gill cavity of Astacus (Pontastacus) leptodactilus ...

The paper presents illustrated description of two species new for science: Pratilepus kutschurganicus and P. ucrainicus. The former is with an open inner fold on P3 and the latter with the closed inner fold. Both species ...