“…The finding of L. terebra reported in this paper has some zoogeographic implication. Makhrov et al [2022] included the discussed species into a list of freshwater molluscs having a peculiar pattern of distribution, namely they occur throughout the entire Siberia, but in Europe are found only in its northeastern part. This is interpreted as a sign of relatively late dispersal to Europe from Siberia, where these species evolved.…”
Section: Resultsmentioning
confidence: 99%
“…This is interpreted as a sign of relatively late dispersal to Europe from Siberia, where these species evolved. According to Makhrov et al [2022], L. terebra might have migrated to Europe before the Pleistocene glaciations, i.e., in the Pliocene. Our data, which confirm the presence of a closely related and, probably, derived species of Ladislavella, in the middle Volga basin, give some support to this assumption.…”
The article reports the finding of a population of freshwater snails morphologically and genetically identified as Ladislavella cf. terebra (Westerlund, 1885), in a reservoir situated in Penza City. This is the first reliable record of representatives of the genus Ladislavella on the territory of European Russia, at a considerable distance from the previously known boundaries of its range. Molecular data suggest that the examined population belongs to the previously unknown species of Ladislavella. The morphoanatomic and ecological characteristics of the studied population and some information about parasites and commensals of mollusсs are given.
“…The finding of L. terebra reported in this paper has some zoogeographic implication. Makhrov et al [2022] included the discussed species into a list of freshwater molluscs having a peculiar pattern of distribution, namely they occur throughout the entire Siberia, but in Europe are found only in its northeastern part. This is interpreted as a sign of relatively late dispersal to Europe from Siberia, where these species evolved.…”
Section: Resultsmentioning
confidence: 99%
“…This is interpreted as a sign of relatively late dispersal to Europe from Siberia, where these species evolved. According to Makhrov et al [2022], L. terebra might have migrated to Europe before the Pleistocene glaciations, i.e., in the Pliocene. Our data, which confirm the presence of a closely related and, probably, derived species of Ladislavella, in the middle Volga basin, give some support to this assumption.…”
The article reports the finding of a population of freshwater snails morphologically and genetically identified as Ladislavella cf. terebra (Westerlund, 1885), in a reservoir situated in Penza City. This is the first reliable record of representatives of the genus Ladislavella on the territory of European Russia, at a considerable distance from the previously known boundaries of its range. Molecular data suggest that the examined population belongs to the previously unknown species of Ladislavella. The morphoanatomic and ecological characteristics of the studied population and some information about parasites and commensals of mollusсs are given.
“…During the Tertiary and Quaternary periods, the territory of Siberia was an arena for large-scale migrations of various species of freshwater animals and even entire faunal complexes. Many groups of mollusks were actively involved in these migrations and faunogenetic processes [58,[61][62][63][64]. The recent malacofauna of freshwaters of Siberia was formed as a result of climatic perturbations of the Quaternary period.…”
Section: An Analysis Of Neobiotic Malacofauna Of Siberiamentioning
(1) This article reviews all available information on the species composition, current distribution, and origins of the neobiotic (non-indigenous and restoring the lost range) freshwater mollusks in Siberia. (2) An extensive literary search has been carried out, and virtually all existing publications of recent decades on the findings of freshwater mollusk species new to Siberia were taken into account. We examined extensive malacological collections of some of Russia’s and Kazakhstan’s scientific organizations. The core of the examined material is our own observations and collections made in various parts of Siberia and adjacent areas. (3) An annotated checklist of neobiotic species of mollusks reliably recorded in Siberia is presented, and probable mechanisms and “corridors” of infiltration of these species into the region are discussed. Most of the discovered snail species belong to a group popular among aquarists, and their source of introduction is obvious. Another large portion of species infiltrate into the region with the development of fish farming. A classification of species of neobiotic freshwater mollusks of Siberia was proposed and a forecast was made for changes in the Siberian freshwater malacofauna for the coming decades. (4) In our opinion, at present it is possible to accept the newest stage in the genesis of the freshwater malacofauna of Siberia, occurring in conditions specific to the Anthropocene.
The growth and production of glacial relic amphipods Monoporeia affinis (Lindström, 1855) in a small subarctic lake were studied based on detailed seasonal observations in 2019–2021. Growth and production were closely related to trophic conditions (chlorophyll a concentration). The maximum values were observed at low water temperatures (~5°C) in early summer, coinciding with the spring maximum of chlorophyll. The summer warming of bottom waters was accompanied by a decrease in the growth rate of amphipods, which is apparently associated with the consumption of most of the primary production in the pelagic zone. It is concluded that current climatic conditions can adversely affect glacial relicts even in cold-water lakes of the subarctic zone.
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