A new species of predaceous mite, Cheletomimus (Hemicheyletia) crinitus sp. nov. (Acariformes: Cheyletidae), is described from Eocene Baltic amber based on a fossil female. Among species of the genus, it belongs to the C. (H.) wellsi species group (16 extant species) and differs from the closely morphologically related species, C. greenwoodi by the following features. In C. crinitus sp. nov., setae d2 are situated on the hysteronotal shield (vs. off this shield in C. greenwoodi), the propodonotal and hysteronotal shields each bear five pairs of median setae (vs. 3 and 1 pairs of median setae, respectively), setae h1 and h2 are subequal in width to other lateral hysteronotal setae (vs. half the width of other hysteronotal setae).

Andre V. Bochkov [andrevbochkov@gmail.com], Zoological Institute of the Russian Academy of Sciences, Universitetskaya Embankment 1, 199034 Saint Petersburg, Russia; Tyumen State University, 10 Semakova Str., 625003 Tyumen, Russia. Ekaterina A. Sidorchuk [e.a.sidorchuk@gmail.com], Borissiak Paleontological Institute of the Russian Academy of Sciences, Profsoyuznaya 123, 117997 Moscow, Russia.