Ruchin Alexander B. RussiaSaranskJoint Directorate of the Mordovia State Nature Reserve and National Park “Smolny”, 6 Pereulok Dachnyj, Saransk, Republic of Mordovia 430011, Russiasasha_ruchin@rambler.ru Author's articles DISTRIBUTION AND CONTACT ZONE OF TWO FORMS OF THE GREEN TOAD FROM THE BUFOTES VIRIDIS COMPLEX (ANURA, AMPHIBIA), DIFFERING IN GENOME SIZE, IN THE VOLGA REGION