The state of the art of biospeleology in Russia and other countries of the former Soviet Union: a review of the cave (endogean) invertebrate fauna. 1. Introduction—crustacea
Journal: Entomological Review
Year: 2016

At least 308 species or subspecies of stygo- or troglobionts and at least 735 species or subspecies of mostly presumed stygo- or troglophiles representing 17 phyla, 38 classes, 90 orders, and 278 families of invertebrates are currently known to populate the caves and subterranean waters of Russia and other countries of the former Soviet Union. The main evolutionary burst in the endogean habitats including the MSS (milieu souterrain superficiel, or mesovoid shallow stratum) is observed in arthrop