| 词条 | Borysthenia |
| 释义 |
| fossil_range= {{fossil range|Middle Pleistocene|Recent|at least from Middle Pleistocene[1]-Recent}} | image = Borysthenia naticina shell.jpg | image_caption = Subfossil shells of Borysthenia naticina | regnum = Animalia | phylum = Mollusca | classis = Gastropoda | unranked_superfamilia= clade Heterobranchia informal group Lower Heterobranchia | superfamilia = Valvatoidea | familia = Valvatidae | genus = Borysthenia | genus_authority = Lindholm, 1913[1] }} Borysthenia is a genus of small freshwater snails with an operculum, aquatic gastropod mollusks in the family Valvatidae, the valve snails. The aperture of Borysthenia is not circular.[2] Animals are ovoviviparous.[2] SpeciesThe genus Borysthenia contains the following species:
References1. ^Lindholm W. A. (1913). "Miszellen zur Malakozoologie des Russischen Reiches. I-XIII." Ezhegodnik Zoologicheskago Muzeya Imperatorskoj Akademii Nauk - Annuaire due Musée Zoologique de l'Académie Impériale des Sciences de St.-Pétersbourg 18(1): [https://archive.org/stream/ezhegodnik18zool#page/150/mode/2up 151]-167. [https://archive.org/stream/ezhegodnik18zool#page/166/mode/2up page 167]. {{Taxonbar|from=Q4946885}}2. ^1 2 "Genus summary for Borysthenia". AnimalBase, last modified 28 February 2009, accessed 22 May 2011. 3. ^1 Kondrashov P. E. (2007). "New gastropod species from the Pleistocene of the Upper Don basin". Paleontological Journal 41(5): 513-519. {{doi|10.1134/S0031030107050061}}. 4 : Valvatidae|Taxa named by Wassili Adolfovitch Lindholm|Gastropod genera|Extant Middle Pleistocene first appearances |
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