Key to the world species of Ernogamasus Athias-Henriot, 1971 (Parasitiformes: Parasitidae).

A key to all globally known 33 species of Ernogamasus is presented.

Trachygamasus karuni sp. nov., a new mite species from Iran (Parasitiformes: Parasitidae).

A new mite species, Trachygamasus karuni sp. nov. is described from buffalo, sheep and horse manure at several locations north of Ahvaz city, Khuzestan, Iran.

A new species of mite in the genus Ernogamasus Athias-Henriot, 1971 (Parasitiformes: Parasitidae).

A new mite species Ernogamasus papilio sp. nov., originating from south-eastern Poland and north-eastern Slovakia, is described, as well as a supplementary description for E.

Five new species of mites in the genus Leptogamasus Trägårdh, 1936, and a new subgenus Medioperigamasus (Parasitiformes: Parasitidae).

Five new species of mites belonging to the genus Leptogamasus are described, in a new subgenus Leptogamasus (Medioperigamasus)-L. (M.) lamelligynus sp.

Key to the world species of Holoparasitus Oudemans, 1936 (Acari: Parasitiformes: Parasitidae).

Keys to the world species of the mite genus Holoparasitus (Parasitidae family) are provided separately for males and females. The genus includes 55 species, 42 of which are allocated to eight species groups. The Holoparasitus inornatus species group is newly defined.