Three new species of the feather mite genus Trouessartia (Acariformes: Trouessartiidae) from passerines (Passeriformes) in the Asian part of Russia.

Three new species of the feather mite genus Trouessartia are described from passerines from various regions in the Asian part of Russia: Trouessartia locustellae sp. nov. from the Pallass grasshopper warbler Helopsaltes certhiola (Pallas) (type host) and the Middendorffs grasshopper warbler H. ochotensis (Middendorff) (Locustellidae), T. mugimaki sp. nov. from the mugimaki flycatcher Ficedula mugimaki (Temminck) (Muscicapidae), and T. pyrrhulae sp. nov. from the Eurasian bullfinch Pyrrhula pyrrhula Linnaeus (Fringillidae). Descriptions and differential diagnoses are supplemented with sequences of mitochondrial cytochrome c oxidase subunit I (CO1).