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.