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 Subfamily Pyrgulinae Brusina, 1882 Remarks. The genus concepts of Pontocaspian Pyrgulinae follow the revision of Neubauer et al. (2018) . Further change is expected in several of the keeled species here listed under? Turricaspia (? T. aenigma ,? T. basalis ,? T. dimidiata ,? T. pseudobacuana , and? T. pseudodimiata ) that may be grouped in their own genus for which the name Trachycaspia Dybowski & Grochmalicki, 1917 (type species: Rissoa dimidiata Eichwald, 1838) is available. However, such a decision will require further documentation.