title: Evidence of the repeated penetration of Cryptomphalus aspersa (Gastropoda, Pulmonata, Helicidae) into the territory of Eastern Europe
abstract: The literature sources and collection materials providing evidence of the repeated penetration of the land mollusk Cryptomphalus aspersa into the territory of Eastern Europe are analyzed. In the second half of the 19th century and the beginning of the 20th century, mollusks of this species were found in the Crimea (Feodosia), Northern Black Sea coastal region (Odessa, Kherson), and even in the forest-steppe zone of Ukraine (in the vicinity of Vinnitsa). The latter finding is verified by a shell 
journal: Russian Journal of Biological Invasions