Mollusc species from the Pontocaspian region - an expert opinion list Author Wesselingh, Frank Naturalis Biodiversity Center, Leiden, Netherlands Author Poorten, Jan Johan ter Field Museum of Natural History, Chicago, United States of America Author Kijashko, Pavel Moscow State University, Moscow, Russia Author Albrecht, Christian Justus Liebig University, Giessen, Germany Author Anistratenko, Olga Yu Schmalhausen Instite of Zoology, National Academy of Sciences of Ukraine, Kiev, Ukraine & Institute of Geological Sciences, National Academy of Sciences of Ukraine, KievUkraine Author Frolov, Pavel Saint-Petersburg State University, Saint Petersburg, Russia Author Gándara, Alberto Martinez Grigore Artipa National Museum of Natural History, Bucharest, Romania Author Gittenberger, Arjan Gittenberger Marine Research, Inventory & Strategy, Leiden, Netherlands Author Gogaladze, Aleksandre Naturalis Biodiversity Center, Leiden, Netherlands Author Mikhail Karpinsky Russian Federal Research Institute of Fisheries and Oceanography, Moscow, Russia Author Popa, Luis Grigore Antirpa National Museum of Natural History, Bucharest, Romania Author Sands, Arthur F Justus Liebig University, Giessen, Germany Author Vandendorpe, Justine Justus Liebig University, Giessen, Germany Author Wilke, Thomas Justus Liebig University Giessen Germany text ZooKeys 2019 827 31 124 http://dx.doi.org/10.3897/zookeys.827.31365 journal article http://dx.doi.org/10.3897/zookeys.827.31365 1313-2970-827-31 10B663895E424E5287D8F49E2405D651 10B663895E424E5287D8F49E2405D651 Clathrocaspia logvinenkoi (Golikov & Starobogatov, 1966) *1966 P. [yrgula] (Caspia) logvinenkoi Golikov & Starobogatov: 354, fig. 1(7). 2006 Caspia logvinenkoi (Golikov & Starobogatov, 1966). - Kantor and Sysoev: 88, pl. 41, fig. I. 2007a Caspia (Clathrocaspia) logvinenkoi (Golikov & Starobogatov, 1966). - Anistratenko: 25-26, fig. 2. 2016 Caspia logvinenkoi (Golikov & Starobogatov, 1966). - Vinarski and Kantor: 224-225. Status. Accepted Pontocaspian species. Type locality. Don Delta, Russia. Distribution. Known only from the type locality. Taxonomic notes. The species has distinctive shell characters: broad conical shape with a weak subsutural bulge and apically thickened peristome. Remarks. The type material was collected by Mordukhay-Boltovskoy in 1937 and comprises two specimens, the holotype and the paratype. Three additional specimens were collected from the same region in 2006 ( Anistratenko 2007a ). The salinity at the type locality fluctuates between freshwater and ca. 1‰. Conservation status. Not assessed. In the fifty years since the description of this species five specimens have been collected; this is likely evidence of its rarity. Known only from two close localities, C. logvinenkoi appears to have an extremely narrow distributional range in the Azov-Black Sea Basin, being endemic to the Taganrog province (e.g., Anistratenko 2007a ).