Roman snail Helix pomatia L. - new alien species in Mordovia

Fauna studying is to an actual scientific problem on set of the causes. This sort of researches all-important for regions where economic development is bound to agrarian sector and augmentation of an ecological load at medium. One of problems of studying of fauna now is studying invasive and non-native species. The invazivnye species also named alien, non-native and immigrants often become the cause of ecological and economic problems in different regions of world. In Mordovia for the first time has been found a non-native species - Roman snail Helix pomatia. This species is invasian now. It may have anthropogenic character. In work the fact of a find and the primary data about the found population is described. To indirect signs it is possible to draw a conclusion on existence of small population. The review of a fortune and invasive behaviour of it in other regions of a geographic range of habitation is made. The analysis of the literature allows to draw a conclusion on an ambiguous state of populations in separate regions. Also the data about geographic range limens, especially its eastern frontier is ambiguous. The assumption about invasive or antropochoric character of the population is come out. Necessity of studying of the population for the causes of ecological character is proved. Settling and reproduction of a molluscum in the conditions of region allows to draw a conclusion on a potentiality of use of a Roman snail as object of growing in the combined culture approved in other regions of a geographic range of habitation of this species.