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4 Acta Geologica Polonica

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Morphology and taxonomy of Late Badenian to Sarmatian Mohrensternia (Gastropoda: Rissooidea) of the Central Paratethys

100%

Anistratenko V.

Acta Geologica Polonica

2005

tom Vol. 55, no. 4

371-392

The protoconch and teleoconch morphology of the Late Badenian and Sarmatian species of the genus Mohrensternia of the Central Paratethys are described and illustrated. Eight species of the genus are considered valid: Mohrensternia inflata (HÖRNES, 1856), M. sarmatica (FRIEDBERG, 1923), M. pseudinflata (HILBER, 1897), M. perinflata (FRIEDBERG, 1923), M. angulata (EICHWALD, 1830), M. pseudangulata (HILBER, 1897), M. banatica (JEKELIUS, 1944), and M. friedbergi sp. nov. A lectotype is designated forRissoa angulata (EICHWALD, 1830), the type species of Mohrensternia (STOLICZKA, 1868). The type material of all species introduced by (W. FRIEDBERG, 1923) is revised and lectotypes are designated for M. sarmatica, M. pseudosarmatica and M. perinflata.

A new rissoid gastropod with lecithotrophic development from the Miocene of Paratethys

100%

Anistratenko V.

Acta Geologica Polonica

2009

tom Vol. 59, no. 2

261-267

The results of detailed morphological studies on Rissoa sobieskii from the Badenian of the eastern Central Paratethys are presented. Its paucispiral protoconch with a bulbous embryonic shell indicates it to have had a lecithotrophic (non-planktotrophic) larval development, apparently lacking even a short free-swimming larval stage. This contrasts with all other known Miocene Rissoa species, which have shell features indicating a planktotrophic larval stage. The peculiarity of R. sobieskii is also supported by its characteristic narrowing of the aperture and almost complete lack of teleoconch sculpture. The time coincidence of the appearance of the non-planktotrophic species with distinct changes in salinity of the badenian basin suggests that the alteration (.switching.) of the type of early ontogeny from planktotrophic to non-planktotrophic development could have been an environmentally induced phenomenon.

Minute patellogastropods (Mollusca, Lottiidae) from the Middle Miocene of Paratethys

63%

Anistratenko O. , Anistratenko V.

Acta Geologica Polonica

2007

tom Vol. 57, no. 3

343-376

The protoconch and teleoconch morphology of lottiid patellogastropods that inhabited the Central and Eastern Paratethys in the Badenian and Sarmatian are described and illustrated. Eleven species belonging to the genera Tectura, Blinia, Flexitectura and Squamitectura are considered as valid: Tectura laevigata (EICHWALD, 1830), T. compressiuscula (EICHWALD, 1830), T. zboroviensis FRIEDBERG, 1928, T. incognita FRIEDBERG, 1928, Blinia angulata (D.ORBIGNY, 1844), B. pseudolaevigata (SINZOV, 1892), B. reussi (SINZOV, 1892), B. sinzovi (KOLESNIKOV, 1935), Flexitectura subcostata (SINZOV, 1892), F. tenuissima (SINZOV, 1892), and Squamitectura squamata (O. ANISTRATENKO, 2001). The type material of species introduced by W. FRIEDBERG (1928) is revised and lectotypes are designated for T. zboroviensis and T. incognita. The taxonomic status and position of this group of species is discussed. Data on palaeogeographic and stratigraphic distribution, variability and the relationships of Middle Miocene Lottiidae Gray, 1840 are presented.

Limpet-shaped gastropods of the genus Diodora (Vetigastropoda: Fissurellidae) from the Middle Miocene of Western Ukraine

51%

Dell'Angelo B. , Sosso M. , Anistratenko O. , Anistratenko V.

Acta Geologica Polonica

2017

tom Vol. 67, no. 2

235--247

The genus Diodora Gray, 1821 is widely represented in the Middle Miocene of the Central Paratethys with specimens usually attributed to D. graeca (Linnaeus, 1758) or D. italic (Defrance, 1820), well-known recent species of the Atlantic / Mediterranean Basin. In samples from the Upper Badenian of Western Ukraine we found two clusters of Diodora specimens, showing a similarity with these species, but a review of shell diagnostic characters using a statistical approach has revealed their clear conchological separateness. The first species from Varovtsi and Horodok is attributed herein to D. nodosa (Eichwald, 1830), whereas the second species from Maksymivka is described as a new species, D. stalennuyi sp. nov. We consider that these molluscs inhabited the Polish-Ukrainian marginal part of the Late Badenian Basin. Detailed descriptions of the protoconch and teleoconch morphology of the taxa involved, including SEM images, are presented.