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

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

Acta Geologica Polonica

2017

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.

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

Anistratenko O., Anistratenko V.

Acta Geologica Polonica

2007

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.