Abstract
Two new species of the feather mite genus Trouessartia (Astigmata: Trouessartiiidae) are described from passerine hosts from Northern Asia: Trouessartia aureolae sp. n. from the Yellow-breasted Bunting, Emberiza aureola Pallas (Emberizidae) and T. cyanoptilae sp. n. from the Blue-and-white Flycatcher, Cyanoptila cyanomelana (Temminck) (Muscicapidae). Trouessartia aureolae is very close to T. emberizae Mironov, 2021. The new species most clearly differs from T. emberizae in the following features: in males, the membranous apophyses of adanal apodemes are triangular, and the anterior ends of epimerites IVa are roughly rounded; in females, setae h1 extend to the free margin of the interlobar membrane, and the primary spermaduct guide extends to the level of setae h2. Trouessartia cyanoptilae is most similar to T. microfolia Gaud, 1952 and T. saularis Constantinescu, 2018. The new species differs from T. microfolia and T. saularis in the following features: in both sexes, setae d1 are absent; in males, the terminal lamellae are triangular with oblique posterior margin, thus, the whole posterior end of the opisthosoma resembles a fsh tail; in females, the collar of the spermathecal head is short and smooth.
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