НОВІ ДАНІ ЗА ПРІСНОВОДНИМИ МОЛЮСКАМИ СЕКЦІЇ AMPULLACEANA ПІДРОДУ PEREGRIANA (GASTROPODA, PULMONATA, LYMNAEIDAE) НЕОГЕНУ СЕРБІЇ ТА ІНШИХ ТЕРИТОРІЙ

Problem Statement and Purpose. The aim of the work is to analyze the stratigraphic distribution of freshwater mollusks of the Ampullaceana Servain section, 1881 of the subgenus Peregriana Servain, 1881 of the genus Lymnaea Lamarck, 1799 (Gastropoda, Pulmonata, Lymnaeidae) in the Neogene of Serbia and southern Ukraine, as well as to describe a new species – Lymnaea (Peregriana) krstici, sp. nov. from the Pliocene sediments of Eastern Serbia (the mazgos coal gap), which were obtained based on the results of the budget theme “Organic World of the late Precambrian and Phanerozoic of Ukraine: biodiversity, revision of the systematic composition, phylogeny of leading groups of fauna and flora”. Data & Methods. Freshwater mollusks of the Ampullaceana Servain section, 1881 of the subgenus Peregriana Servain, 1881 of the genus Lymnaea Lamarck, 1799 were studied by us from deposits of the late Pliocene of Eastern Serbia (Maz’os coal cut), as well as from Miocene deposits of Ukraine, as well as from materials of joint work with V. A. Prysyazhnyuk during expedition work. When analyzing fossil limneid shells, a comparator method developed by Ya. I. Starobogatov was used, which makes it possible to simultaneously distinguish (and identify differences) for each of the four parameters of Raup D. M., which determine the hereditary law of shell growth. According to Raup D. M., the shell of gastropods of pulmonary mollusks is characterized by four genetically determined parameters: the Shape of the forming curve (cross-section of the shell tube); the rate of growth of the forming curve (with each rotation of the shell); the step of the forming curve from the twisting axis (with each rotation of the shell); the step of the forming curve along the twisting axis (with each rotation of the shell). Thus, according to the shape of the forming curve (the first parameter), the subgenera of limneids are divided into several natural groups, which are assigned the rank of sections. The comparator method for conchological purposes has the following advantages: the contours of the comparator method were tested (Kruglov, Starobogatov, 1983, 1984, 1985, etc.) on a large number of specimens (hundreds and thousands of shells for mass species and dozens for rare ones). This automatically takes into account the entire range of turtle variability, and comparing even single specimens with them means comparing them with a very large series. The method allows you to compare limneid shells regardless of their individual age and compare the upper parts with whole shells, which is very important when working with fossil material, since it is the limneid curl that is better preserved in the fossil state. Results. A new species of freshwater lung mollusks (Gastropoda, Pulmonata, Lymnaeidae) of the genus Lymnaea Lamarck, 1799, subgenus Peregriana Servain, 1881, Ampullaceana Servain, 1881 from the upper Pliocene sediments of the Maz’os Carboniferous (Eastern Serbia) – Lymnaea (Peregriana) krstici Kovalenko, sp. nov. is described. The distribution and association of freshwater lung mollusks (Gastropoda, Pulmonata, Lymnaeidae) of the genus Lymnaea Lamarck, subgenus Peregriana Servain, Section Ampullaceana Servain to certain stratigraphic horizons of the Neogene of southern Ukraine and other territories, namely: Lymnaea (Peregriana) podolica Kovalenko, 1990, L. (P.) pontica Kovalenko, 1990, L. (P.) sublimosa (Sinzow, 1875) – to the Pontic deposits of southern Ukraine, and Lymnaea (Peregriana) krstici Kovalenko, sp. nov. – to the upper Pliocene deposits of the Mazgos Carboniferous in eastern Serbia. The presence of different species of limenae of the subgenus Peregriana of the Ampullaceana section in stratigraphically different layers of the Neogene of Ukraine and Serbia (upper Miocene, Sarmatian regionoyarus (lower Sarmatian regionopid ilyarus) and Pontic regionoyarus of Ukraine and Moldova and upper Pliocene of Serbia) makes this group valuable for stratification of continental deposits and their correlation with marine ones.