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The striped nerite, scientific name ''Theodoxus transversalis'', is a species of small freshwater snail with an operculum, an aquatic gastropod mollusk in the family Neritidae, the nerites. == Distribution == The distribution of this species is Danubian.〔(in Slovak) Lisický M. J. (1991). (''Mollusca Slovenska'' ) (Slovak molluscs ). VEDA vydavateľstvo Slovenskej akadémie vied, Bratislava, 344 pp.〕 Fehér et al. (2012)〔Fehér Z., Albrecht C., Major Á., Sereda S. & Kríszik V. (2012). "Extremely low genetic diversity in the endangered striped nerite, ''Theodoxus transversalis'' (Mollusca, Gastropoda, Neritidae) – a result of ancestral or recent effects?". ''North-Western Journal of Zoology'' 8(2): 300-307. (PDF ).〕 revealed in their conservation genetics study, that intraspecific variability of two researched DNA markers (cytochrome c oxidase subunit I and ATP synthase subunit α) is very low.〔 They hypothetized, that bottlenecked population colonized the whole range of ''Theodoxus transversalis'' in Holocene.〔 Fehér et al. (2012) also hypothetized, that such low genetic diversity caused the high sensitivity of ''Theodoxus transversalis'' to water quality.〔 ''Theodoxus transversalis'' was widespread in Danubian drainage,〔 but population of this species declined because of water pollution and this species is considered as endangered.〔 It is also listed in the Annexes II and IV of the Habitats Directive.〔 It occurs in: * Austria * Bulgaria * Croatia * Germany - in Bavaria only and it is critically endangered (''vom Aussterben bedroht'') * Slovakia〔 Horsák M., Juřičková L., Beran L., Čejka T. & Dvořák L. (2010). "Komentovaný seznam měkkýšů zjištěných ve volné přírodě České a Slovenské republiky. (list of mollusc species recorded outdoors in the Czech and Slovak Republics )". ''Malacologica Bohemoslovaca'', Suppl. 1: 1-37. (PDF ).〕 * Hungary * Moldova * Romania * Serbia and Montenegro * Ukraine 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Striped nerite」の詳細全文を読む スポンサード リンク
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