Check-list and distribution maps of the molluscs of the Czech and Slovak Republics

Malacologica Bohemoslovaca Web pages of Czech and Slovak malacologists Stránky českých a slovenských malakologů Check-list and distribution maps of the molluscs of the Czech and Slovak Republics MICHAL HORSÁK1, TOMÁŠ ČEJKA2, LUCIE JUŘIČKOVÁ3, LUBOŠ BERAN4, JITKA HORÁČKOVÁ5, LIBOR DVOŘÁK6, RADOVAN COUFAL7, MICHAL MAŇAS8 & VERONIKA HORSÁKOVÁ9 1 Masaryk University, e-mail: [email protected], https://orcid.org/0000-0003-2742-2740 2 Slovak Academy of Sciences, https://orcid.org/0000-0002-6485-5660 3 Charles University, https://orcid.org/0000-0001-5163-1222 4 Nature Conservation Agency of the Czech Republic, https://orcid.org/0000-0002-58516048 5 Czech University of Life Sciences Prague, https://orcid.org/0000-0003-3776-041X 6 https://orcid.org/0000-0002-4712-3679 7 Masaryk University, https://orcid.org/0000-0002-5870-5041 8 https://orcid.org/0000-0003-2697-5140 9 Masaryk University, https://orcid.org/0000-0002-3264-7728 Suggested citation: HORSÁK M., ČEJKA T., JUŘIČKOVÁ L., BERAN L., HORÁČKOVÁ J., DVOŘÁK L., COUFAL R., MAŇAS M. & HORSÁKOVÁ V., 2025: Check-list and distribution maps of the molluscs of the Czech and Slovak Republics. – Online at http://mollusca.sav.sk/malacology/checklist.htm, checklist updated at December 21, 2025, maps updated at December 21, 2025. The current version of the check-list follows HORSÁK et al. (2013) with up-to-date modifications supplemented with a reference. Distribution map for each species was constructed based on published data and our knowledge based on unpublished records. So far 252 species of molluscs, including 223 species of gastropods (52 aquatic and 171 terrestrial) and 29 species of bivalves, have been found outdoors in the Czech Republic. The fauna of Slovakia comprises 261 species, including 231 gastropods (57 aquatic and 174 terrestrial) and 30 bivalves. Abbreviations: To the checklist: B – Bohemia; M – Moravia (incl. Czech Silesia); S – Slovakia; † – an extinct species for the territory; (†) – probably extinct species for the territory; + – a non-native species for the territory; ! – an endemic species of smaller area. ? – occurrence probable, but not confirmed. To the maps: M – past distribution; R – recent distribution; M<R – number of occurrences increased over the last few decades (e.g. for non-native species); M>R – number of occurrences declined over the last few decades (e.g. for seriously threatened species); M=R – no obvious changes in the species distribution. Updates to HORSÁK et al. (2013) are marked with an asterisk * and annotated below the species list. There is also a handy tiptool with comments on the names of the changed species (only available in operating systems with a mouse pointer; not in smartphones). GASTROPODA plži subclass Neritimorpha order Cycloneritida Neritidae zubovcovití Theodoxus Montfort, 1810 T. danubialis (C. Pfeiffer, 1828) – M S map images zubovec dunajský T. fluviatilis (Linnaeus, 1758) B† – +S map images zubovec říční T. transversalis (C. Pfeiffer, 1828) – – S map images zubovec pruhovaný subclass Caenogastropoda order Architaenioglossa Viviparidae bahenkovití Viviparus Montfort, 1810 V. acerosus Bourguignat, 1862 * +B M S map images bahenka uherská V. contectus (Millet, 1813) B M S map images bahenka živorodá V. viviparus (Linnaeus, 1758) B +M – map images bahenka pruhovaná Aciculidae jehlovkovití Acicula Hartmann, 1821 A. parcelineata (Clessin, 1911) – M S map images jehlička malinká Platyla Moquin-Tandon, 1856 P. polita (Hartmann, 1840) B M S images jehlovka hladká unassigned order of Caenogastropoda Melanopsidae piskořkovití Esperiana Bourguignat, 1877 E. daudebartii acicularis (A. Férussac, 1823) – – S map images piskořka ostrá E. esperi (A. Férussac, 1823) – – S map images piskořka skvrnitá Thiaridae Gill, 1871 (1823) věžovkovití Melanoides Olivier, 1804 M. tuberculata (O. F. Müller, 1774) * – +M +S map images věžovka hrbolkatá order Littorinimorpha Bithyniidae bahnivkovití Bithynia Leach, 1818 B. leachii (Sheppard, 1823) – M S map images bahnivka nadmutá B. tentaculata (Linnaeus, 1758) B M S map images bahnivka rmutná B. transsilvanica (Bielz, 1853) +B M S map images bahnivka východní Bythinellidae praménkovití Bythinella Moquin-Tandon, 1856 B. austriaca (von Frauenfeld, 1857) B M S map images praménka rakouská B. pannonica (von Frauenfeld, 1865) – – S! map images praménka široká Hydrobiidae zdrojenkovití Clathrocaspia Lindholm, 1930 C. knipowitschii (Makarov, 1938) * – – +S map images mřížovka kaspická Alzoniella Giusti & Bodon, 1984 A. slovenica (Ložek & Brtek, 1964) – M! S! map images vývěrka slovenská Hauffenia Pollonera, 1889 H. kissdalmae Erőss & Petró, 2008 * – – S! map images krasovka Kissova H. lozekiana Haase, Grego, Eröss, Farkas & Fehér, 2021 * – – S! map images krasovka Ložkova Lithoglyphidae kamolepovití Lithoglyphus Menke, 1830 L. naticoides (C. Pfeiffer, 1828) – M S map images kamolep říční Tateidae písečníkovití Potamopyrgus W. Stimpson, 1865 P. antipodarum (J. E. Gray, 1843) +B +M +S map images písečník novozélandský subclass Heterobranchia infraclass "Lower Heterobranchia" Valvatidae točenkovití Valvata O. F. Müller, 1773 V. cristata O. F. Müller, 1774 B M S map images točenka plochá V. macrostoma Mörch, 1864 B – S map images točenka veleústá V. piscinalis (O. F. Müller, 1774) B M S map images točenka kulovitá Borysthenia Lindholm, 1914 B. naticina (Menke, 1845) – – S map images zákrutka říční superorder Hygrophila Acroloxidae člunicovití Acroloxus Beck, 1838 A. lacustris (Linnaeus, 1758) B M S map images člunice jezerní Lymnaeidae plovatkovití Myxas J. Sowerby, 1822 M. glutinosa (O. F. Müller, 1774) B† – – map images pláštěnka sliznatá Radix Montfort, 1810 R. auricularia (Linnaeus, 1758) B M S map images uchatka nadmutá Ampullaceana Servain, 1882 A. ampla (Hartmann, 1821) * B M S map images baňatka široká A. balthica (Linnaeus, 1758) * B M S map images baňatka vejčitá A. lagotis (Schrank, 1803) * B M S map images baňatka zaostřená Peregriana Servain, 1882 P. peregra (O. F. Müller, 1774) * B M S map images potočnatka toulavá Galba Schrank, 1803 G. truncatula (O. F. Müller, 1774) B M S map images bahnatka malá Pseudosuccinea F. C. Baker, 1908 * P. columella (Say, 1817) * +B – – map images blátivka americká Ladislavella Dybowski, 1913 * L. occulta (Jackiewicz, 1959) *B M S map images blatnatka severní Stagnicola Jeffreys, 1830 S. corvus (Gmelin, 1791) B M S map images blatenka tmavá S. fuscus (C. Pfeiffer, 1821) B – – map images blatenka rybničná S. palustris (O. F. Müller, 1774) * B M S map images blatenka bažinná Lymnaea Lamarck, 1799 L. stagnalis (Linnaeus, 1758) B M S map images plovatka bahenní Physidae levatkovití Aplexa Fleming, 1820 A. hypnorum (Linnaeus, 1758) B M S map images levotočka bažinná Physa Draparnaud, 1801 P. acuta Draparnaud, 1805 * +B +M +S map images levatka ostrá P. fontinalis (Linnaeus, 1758) B M S map images levatka říční Planorbidae okružákovití Planorbella Haldeman, 1843 P. duryi (Wetherby, 1879) * – – +S map images okružík floridský Planorbis O. F. Müller, 1773 P. carinatus O. F. Müller, 1774 B M S map images terčovník kýlnatý P. planorbis (Linnaeus, 1758) B M S map images terčovník vroubený Anisus Studer, 1820 A. leucostoma (Millet, 1813) B M S map images svinutec běloústý A. septemgyratus (Rossmässler, 1835) – M S map images svinutec sedmitočný A. spirorbis (Linnaeus, 1758) B M S map images svinutec kruhovitý A. vortex (Linnaeus, 1758) B M S map images svinutec zploštělý A. vorticulus (Troschel, 1834) B M S map images svinutec tenký Bathyomphalus Charpentier, 1837 B. contortus (Linnaeus, 1758) B M S map images řemeník svinutý Gyraulus Charpentier, 1837 G. acronicus (A. Férussac, 1807) B M S map images kružník severní G. albus (O. F. Müller, 1774) B M S map images kružník bělavý G. crista (Linnaeus, 1758) B M S map images kružník žebrovaný G. parvus (Say, 1817) * B M S map images kružník malý G. riparius (Westerlund, 1865) – – S map images kružník drobný G. rossmaessleri (Auerswald, 1852) * B M S map images kružník Rossmaesslerův Hippeutis Charpentier, 1837 H. complanatus (Linnaeus, 1758) B M S map images kýlnatec čočkovitý Segmentina Fleming, 1818 S. nitida (O. F. Müller, 1774) B M S map images lištovka lesklá Ancylus O. F. Müller, 1773 A. fluviatilis O. F. Müller, 1774 B M S map images kamomil říční Planorbarius Duméril, 1806 P. corneus (Linnaeus, 1758) B M S map images okružák ploský Menetus H. & A. Adams, 1855 M. dilatatus (Gould, 1841) +B – – map images menetovník rozšířený Ferrissia Walker, 1903 F. californica (Rowell, 1863) * +B +M +S map images člunka pravohrotá superorder Eupulmonata order Ellobiida Ellobiidae elobiovití Carychium O. F. Müller, 1773 C. minimum O. F. Müller, 1774 B M S images síměnka nejmenší C. tridentatum (Risso, 1826) B M S images síměnka trojzubá order Stylommatophora Succineidae jantarkovití Succinea Draparnaud, 1801 S. putris (Linnaeus, 1758) B M S images jantarka obecná Oxyloma Westerlund, 1885 O. elegans (Risso, 1826) B M S images jantarovka úhledná Succinella Mabille, 1871 S. oblonga (Draparnaud, 1801) B M S images jantařička podlouhlá Quickella C. Boettger, 1939 Q. arenaria (Potiez & Michaud, 1838) – – S map images jantarenka písečná Chondrinidae ovsenkovití Abida Turton, 1831 A. secale (Draparnaud, 1801) – – S map images žitenka režná Granaria Held, 1838 G. frumentum (Draparnaud, 1801) B M S images žitovka obilná Chondrina Reichenbach, 1828 C. avenacea (Bruguière, 1792) B – – images ovsenka skalní C. arcadica clienta (Westerlund, 1883) B M S map images ovsenka žebernatá C. tatrica Ložek, 1948 – – S! map images ovsenka karpatská Truncatellinidae drobničkovití Columella Westerlund, 1878 C. aspera Waldén, 1966 B M S map images ostroústka drsná C. columella (G. von Martens, 1830) – – S map images ostroústka válcovitá C. edentula (Draparnaud, 1805) B M S images ostroústka bezzubá Truncatellina Lowe, 1852 T. claustralis (Gredler, 1856) B M S map images drobnička jižní T. costulata (Nilsson, 1823) B M S map images drobnička žebernatá T. cylindrica (A. Férussac, 1807) B M S images drobnička válcovitá Argnidae válcovkovití Argna Cossmann, 1889 A. bielzi (Rossmässler, 1859) – – S map images válcovka karpatská Cochlicopidae oblovkovití Cochlicopa A. Férussac, 1821 C. lubrica (O. F. Müller, 1774) B M S images oblovka lesklá C. lubricella (Porro, 1838) B M S images oblovka drobná C. nitens (M. von Gallenstein, 1848) B M S map images oblovka slatinná Enidae hladovkovití Chondrula Beck, 1837 C. tridens (O. F. Müller, 1774) B M S images trojzubka stepní Ena Turton, 1831 E. montana (Draparnaud, 1801) B M S images hladovka horská Merdigera Held, 1838 M. obscura (O. F. Müller, 1774) B M S images kalonoska chlumní Zebrina Held, 1838 Z. detrita (O. F. Müller, 1774) B M S map images lačník stepní Orculidae sudovkovití Orcula Held, 1838 O. dolium (Draparnaud, 1801) – M S map images sudovka skalní Sphyradium Charpentier, 1837 S. doliolum (Bruguière, 1792) B M S images soudkovka žebernatá Pagodulinidae včelínkovití Pagodulina Clessin, 1876 P. pagodula (Des Moulins, 1830) – M S map images včelínka ozdobná Pupillidae zrnovkovití Pupilla Fleming, 1828 P. alpicola (Charpentier, 1837) * B M S map images zrnovka alpská P. muscorum (Linnaeus, 1758) B M S images zrnovka mechová P. sterrii (von Voith, 1840) * B M S images zrnovka žebernatá P. triplicata (Studer, 1820) B M S images zrnovka třízubá Pyramidulidae kuželovkovití Pyramidula Fitzinger, 1833 P. pusilla (Vallot, 1801) * B M S map images kuželovka skalní P. saxatilis (Hartmann, 1842) *– – S map images kuželovka horská Spelaeodiscidae trojníčkovití Spelaeodiscus Brusina, 1886 S. triarius tatricus (Hazay, 1883) – – S! map images trojníček tatranský Valloniidae údolníčkovití Vallonia Risso, 1826 V. costata (O. F. Müller, 1774) B M S images údolníček žebernatý V. pulchella (O. F. Müller, 1774) * B M S images údolníček drobný Acanthinula Beck, 1847 A. aculeata (O. F. Müller, 1774) B M S images ostnatka trnitá Vertiginidae vrkočovití Vertigo O. F. Müller, 1773 V. alpestris Alder, 1838 B M S images vrkoč horský V. angustior Jeffreys, 1830 B M S map images vrkoč útlý V. antivertigo (Draparnaud, 1801) B M S images vrkoč mnohozubý V. geyeri Lindholm, 1925 B M S map images vrkoč Geyerův V. hoppii (Møller, 1842) * – – S map images vrkoč severní V. lilljeborgi (Westerlund, 1871) B M – map images vrkoč rašelinný V. moulinsiana (Dupuy, 1849) B M S map images vrkoč bažinný V. pusilla O. F. Müller, 1774 B M S images vrkoč lesní V. pygmaea (Draparnaud, 1801) B M S images vrkoč malinký V. ronnebyensis (Westerlund, 1871) B – – map images vrkoč nordický V. substriata (Jeffreys, 1833) B M S images vrkoč rýhovaný Clausiliidae závornatkovití Alopia H. & A. Adams, 1855 A. bielzi clathrata (E. A. Bielz, 1856) – – S! map images sivěnka ozdobná Cochlodina A. Férussac, 1821 C. cerata (Rossmässler, 1836) – M! S map images vřetenovka vosková C. costata (C. Pfeiffer, 1828) B M – images vřetenovka zaměněná C. dubiosa corcontica Brabenec, 1967 B! – – images vřetenovka krkonošská C. fimbriata (Rossmässler, 1835) – – S map images vřetenovka skrytá C. laminata (Montagu, 1803) B M S images vřetenovka hladká C. orthostoma (Menke, 1828) B M S images vřetenovka rovnoústá Charpentieria Stabile, 1864 T. hispidus (Linnaeus, 1758) * B M S images srstnatka chlupatá T. striolatus danubialis (Clessin, 1874) – – S map images srstnatka rýhovaná T. villosulus (Rossmässler, 1838) – M S images srstnatka huňatá Petasina Beck, 1847 P. bakowskii (Poliński, 1924) – – S map images chlupatka horská P. bielzi (E. A. Bielz, 1860) – – S map images chlupatka východní P. edentula (Draparnaud, 1805) B – – map images chlupatka bezzubá P. filicina (L. Pfeiffer, 1841) – – S map chlupatka alpská P. unidentata (Draparnaud, 1805) B M S images chlupatka jednozubá Plicuteria Schileyko, 1978 P. lubomirski (Ślósarski, 1881) B M S images nábělka karpatská Perforatella Schlüter, 1838 P. bidentata (Gmelin, 1791) B M S images vlahovka lužní P. dibothrion (E. A. Bielz, 1860) * – – S map images vlahovka východní P. incarnata (O. F. Müller, 1774) * B M S images vlahovka narudlá P. vicina (Rossmässler, 1842) *B M S images vlahovka karpatská Pseudotrichia Schileyko, 1970 P. rubiginosa (Rossmässler, 1838) B M S images ochlupka rezavá Urticicola Lindholm, 1927 U. umbrosus (C. Pfeiffer, 1828) B M S images žihlobytka stinná Lozekia Hudec, 1970 L. transsilvanica (Westerlund, 1876) – – S map images vojenka sedmihradská Hygromia Risso, 1826 H. cinctella (Draparnaud, 1801) * +B – +S map images tenkostěnka kýlnatá Geomitridae suchomilkovití Helicopsis Fitzinger, 1833 H. striata (O. F. Müller, 1774) *B M† S map images suchorypka rýhovaná Candidula Kobelt, 1871 C. unifasciata (Poiret, 1801) B(†) M S images suchobělka bělavá Helicella A. Férussac, 1821 H. itala (Linnaeus, 1758) B M – map images sucholibka ladní Xerolenta Monterosato, 1892 X. obvia (Menke, 1828) B M S images suchomilka obecná Cernuella Schlüter, 1838 C. neglecta (Draparnaud, 1805) +B – – images suchobytka přehlížená Helicidae hlemýžďovití Arianta Turton, 1831 A. arbustorum (Linnaeus, 1758) B M S images plamatka lesní Helicigona A. Férussac, 1821 H. lapicida (Linnaeus, 1758) B M – images skalnice kýlnatá Faustina Kobelt, 1904 F. cingulella (Rossmässler, 1837) – – S map images skalnatka horská F. faustina (Rossmässler, 1835) B M S images skalnatka lepá F. rossmaessleri (L. Pfeiffer, 1848) – – S map images skalnatka malá Isognomostoma Fitzinger, 1833 I. isognomostomos (Schröter, 1784) B M S images zuboústka trojzubá Causa Schileyko, 1971 C. holosericea (Studer, 1820) B M S images aksamítka sametová Cepaea Held, 1838 C. hortensis (O. F. Müller, 1774) B M S images páskovka keřová C. nemoralis (Linnaeus, 1758) * +B +M +S map images páskovka hajní Caucasotachea Boettger, 1909 C. vindobonensis (C. Pfeiffer, 1828) * B M S map images papáskovka žíhaná Cornu Born, 1778 C. aspersum (O. F. Müller, 1774) * +B +M +S map images hlemýždík kropenatý Helix Linnaeus, 1758 H. lucorum Linnaeus, 1758 +B – +S map images hlemýžď balkánský H. lutescens Rossmässler, 1837 – – S map images hlemýžď žlutavý H. pomatia Linnaeus, 1758 B M S images hlemýžď zahradní H. thessalica Boettger, 1886 * – M S map images hlemýžď pruhovaný BIVALVIA mlži Heteroconchia Palaeoheterodonta Unionoida Margaritiferidae perlorodkovití Margaritifera Schumacher, 1815 M. margaritifera (Linnaeus, 1758) B M† – map images perlorodka říční Unionidae velevrubovití Unio Philipsson, 1788 U. crassus Philipsson, 1788 B M S map images velevrub tupý U. nanus Lamarck, 1819 * B M? S velevrub malý U. pictorum (Linnaeus, 1758) B M S map images velevrub malířský U. tumidus Philipsson, 1788 B M S map images velevrub nadmutý Anodonta Lamarck, 1799 A. anatina (Linnaeus, 1758) B M S map images škeble říční A. cygnea (Linnaeus, 1758) B M S map images škeble rybničná Pseudanodonta Bourguignat, 1877 P. complanata (Rossmässler, 1835) B M S map images škeblička plochá Sinanodonta Modell, 1945 S. woodiana (Lea, 1834) +B +M +S map images škeblice asijská Heterodonta Veneroida Corbiculidae korbikulovití Corbicula Megerle von Mühlfeld, 1811 C. fluminea (O. F. Müller, 1774) * +B +M +S map images korbikula asijská Sphaeriidae okružankovití Sphaerium Scopoli, 1777 S. corneum (Linnaeus, 1758) B M S images okružanka rohovitá S. lacustre (O. F. Müller, 1774) * B M S images okružanka rybničná S. nucleus (Studer, 1820) B M S images okružanka mokřadní S. rivicola (Lamarck, 1818) B M S images okružanka říční S. solidum (Normand, 1844) – – +S map images okružanka žebernatá Pisidium C. Pfeiffer, 1821 P. amnicum (O. F. Müller, 1774) B M S images hrachovka říční Euglesa Jenyns, 1832 E. casertana (Poli, 1791) * B M S images hráškovka obecná E. globularis (Clessin, 1873) * B M S images hráškovka kulovitá E. henslowana (Sheppard, 1825) * B M S images hráškovka hrbolatá E. hibernica (Westerlund, 1894) * B M S images hráškovka severní E. milium (Held, 1836) * B M S images hráškovka prosná E. nitida (Jenyns, 1832) * B M S images hráškovka lesklá E. obtusalis (Lamarck, 1818) *B M S images hráškovka tupá E. personata (Malm, 1855) * B M S images hráškovka malinká E. pseudosphaerium (J. Favre, 1927) * B M S images hráškovka okružankovitá E. subtruncata (Malm, 1855) *B M S images hráškovka otupená E. supina (A. Schmidt, 1851) *B M S images hráškovka obrácená Odhneripisidium Kuiper, 1962 O. moitessierianum (Paladilhe, 1866) * B M S images hrachovečka nepatrná O. tenuilineatum (Stelfox, 1918) * B M S images hrachovečka čárkovaná Dreissenidae slávičkovití Dreissena Van Beneden, 1835 D. polymorpha (Pallas, 1771) +B +M +S images slávička mnohotvárná D. rostriformis (Deshayes, 1838) * – – +S map images slávička kvaga Comment to Bythinella species Bythinella austriaca (von Frauenfeld, 1857) – There are three more species, by their shell morphology similar to B. austriaca, reported from Slovakia: B. hungarica (Hazay, 1881), B. metarubra (Falniowski, 1987) and B. steffeki Grego & Glöer, 2019. The latter species has been described based on a single population in the Slovenský kras Mts., the area with frequent occurrence of B. austriaca, using only shell and genital morphology. It has been unshakeably proven (e.g. BICHAIN et al. 2007) that classical morphological descriptors may not constitute valid specific criteria within Bythinella. Without an integrative taxonomical study, delimiting these putative species based on both mitochondrial and nuclear gene fragments, and without the association of these species with shell morphology, we cannot accept these names as biologically valid taxa. There is no evidence to support an assumption that these species are not only extremes within (eco-)morphological plasticity of a single species, i.e. B. austriaca. GREGO & GLÖER (2019) stated: “The COI sequence in the GenBank under number MK673142 indicates a close relation of the new species to some of the B. austriaca clades.”, which in other words says that there is no genetic difference (at least based on COI gene) between B. austriaca and B. steffeki. The phylogenetic analysis published by BENKE et al. (2009) clearly showed that B. austriaca and B. metarubra are genetically the same. Comments to species names and new records Viviparus acerosus Bourguignat, 1862 – for the first time recorded in Bohemia in 2015, see BERAN et al. (2019). Melanoides tuberculata (O. F. Müller, 1774) – for the first time recorded outdoors in Slovakia in 2000 (MÁJSKY 2000, LIPTÁK et al. 2018). For the first time recorded in Moravia in 2023, see COUFAL & BERAN (2024). Clathrocaspia knipowitschii (Makarov, 1938) – for the first time recorded in Slovakia in 2019, see SZEKERES et al. (2022). Hauffenia kissdalmae Erőss & Petró, 2008 – see HAASE et al. (2021). Hauffenia lozekiana Haase, Grego, Eröss, Farkas & Fehér, 2021 – see HAASE et al. (2021). Radix lagotis (Schrank, 1803) – for the first records, see ČEJKA et al. (2021). For taxonomy see AKSENOVA et al. (2023). Ampullaceana ampla (Hartmann, 1821) – for taxonomy see AKSENOVA et al. (2023). Ampullaceana balthica (Linnaeus, 1758) – for taxonomy see AKSENOVA et al. (2023). Peregriana peregra (O. F. Müller, 1774) – for taxonomy see AKSENOVA et al. (2023). Pseudosuccinea columella (Say, 1817) – repeated records from the same outdoor sites between 2013-2016 provide the first evidence of wintering populations in Bohemia (BERAN et al. 2023). Ladislavella Dybowski, 1913 – originally as Catascopia Meier-Brook & Bargues, 2002. Nomenclature follows PIEŃKOWSKA et al. (2015a) and PIEŃKOWSKA & LESICKI (2018). Ladislavella occulta (Jackiewicz, 1959) – European populations were for some time reported under the name L. terebra (Westerlund, 1885), see PIEŃKOWSKA & LESICKI (2018). The first record in Slovakia near the village of Senné (ČEJKA et al. 2020). Stagnicola palustris (O. F. Müller, 1774) – The molecular data and results presented by PIEŃKOWSKA et al. (2015a). are insufficiently robust to support the recognition of Stagnicola turricula (Held, 1836) as a species distinct from Stagnicola palustris (O. F. Müller, 1774). Reliable taxonomic conclusions require evidence from multiple independent nuclear loci. The observed genetic differentiation may instead reflect a distinct mitochondrial lineage within a single, more variable species. Physa acuta (Draparnaud, 1805) – see comments in WELTER-SCHULTES (2012), p. 56. Planorbella duryi (Wetherby, 1879) – for the first time recorded in Slovakia in 2023, see ČEJKA et al. (2024). Gyraulus parvus (Say, 1817) – current genetic investigation revealed that G. parvus and G. laevis are in fact part of the same species-level clade, with the former having nomenclatural priority (LORENCOVÁ et al. 2021). However, the structure within the mitochondrial tree suggests a North American origin of the invasive populations, earlier reported as G. parvus. It also suggests that although the native race in Europe, i.e. G. laevis, tend to possess some differences in conchology and ecology, the degree of overlap between the races makes it impossible to accurately distinguish between them without the DNA barcode data. Gyraulus rossmaessleri (Auerswald, 1852) – the authorship should be ascribed to Auerswald, see BANK (2011). Ferrissia californica (Rowell, 1863) – originally as F. fragilis (Tryon, 1863), see CHRISTENSEN (2016). Sometimes even a month matters in description of a new species. Pupilla alpicola (Charpentier, 1837) – conspecific with Pupilla pratensis (Clessin, 1871), see NEKOLA et al. (2015). Pupilla sterrii (von Voith, 1840) – the authorship should be ascribed to von Voith, see BANK (2011). Pyramidula pusilla (Vallot, 1801) – the authorship should be ascribed to Vallot, see BANK (2011). Pyramidulla saxatilis (Hartmann, 1842) – species resurrected based on DNA from synonymy with P. rupestris, but it cannot be differentiated by shell morphology from P. pusilla. Only one site has been reported from Veľká Fatra Mts. based on DNA analysis of specimens from that site, see KIRCHNER et al. (2016) and RAZKIN et al. (2016, 2017). Vallonia pulchella (O. F. Müller, 1774) – based on well-supported genetic and conchological evidence, NEKOLA et al. (2025) synonymized V. excentrica, V. enniensis, and V. declivis with V. pulchella. Vertigo hoppii (Møller, 1842) – HORSÁK et al. (2025) documents that it is conspecific with Vertigo arctica (Wallenberg, 1858), which NEKOLA et al. (2018) consider as a separate species, phylogenetically not closely related to V. modesta (Say, 1824). Macrogastra borealis (Boettger, 1878) – Due to some nomenclatorial issues (see http://www.animalbase.uni-goettingen.de/zooweb/servlet/AnimalBase/home/speciestaxon? id=15626) the well-known name Macrogastra latestriata (Schmidt, 1857) had to be substituted by M. borealis (Boettger, 1878). Lucilla scintilla (R. T. Lowe, 1852) – for the first time recorded in Moravia near Mikulčice in 2014, L. Polášek lgt., M. Horsák det. et coll. Gonyodiscus Fitzinger, 1833 – nomenclature follows SALVADOR et al. (2023). Gonyodiscus perspectivus (Megerle von Mühlfeld, 1816) – Discus perspectivus (Megerle von Mühlfeld, 1816) was moved to the genus Gonyodiscus Fitzinger, 1833, see SALVADOR et al. (2023). Gonyodiscus rotundatus (O. F. Müller, 1774) – Discus rotundatus (O. F. Müller, 1774) was moved to the genus Gonyodiscus Fitzinger, 1833, see SALVADOR et al. (2023). Perpolita H. B. Baker, 1928 – taxonomy and nomenclature follows SAITO et al. (2024). Perpolita hammonis (Strøm, 1765) – taxonomy and nomenclature follows SAITO et al. (2024). Perpolita petronella (L. Pfeiffer, 1853) – taxonomy and nomenclature follows SAITO et al. (2024). Perpolita radiatella hesperia Saito & Nekola, 2025 – it was elevated to valid species in 2024 (SAITO et al. 2024). Its presence was comfirmed from Bohemia, Moravia, Slovakia. It was changed to newly described subspecies from P. radiatella (Reinhardt, 1877) to P. radiatella hesperia Saito & Nekola, 2025 (SAITO et al. 2025). Euconulus alderi (J. E. Gray, 1840) [syn. E. praticola (Reinhardt, 1883)] – taxonomy and nomenclature follow HORSÁKOVÁ et al. (2020). Tandonia kusceri (H. Wagner, 1931) and T. rustica (Millet, 1843) – see KORÁBEK et al. (2016a). Deroceras invadens Reise, Hutchinson, Schunack & Schlitt, 2011 – for the first time recorded in Bohemia in 2014, see HUTCHINSON et al. (2014); and in Slovakia in 2017, see ČEJKA (2018). Deroceras juranum Wüthrich, 1993 – see HUTCHINSON & REISE (2009). Krynickillus melanocephalus Kaleniczenko, 1851 – for the first time recorded outdoors in Slovakia in 2020, see ČEJKA et al. (2021). For the first time recorded in Bohemia in 2024, see ČEJKA et al. (2025). Ambigolimax valentianus (Férussac, 1822) – for the first time recorded outdoors in Slovakia in 2020, see ČEJKA et al. (2021). Originally as Lehmannia Heynemann, 1863, for the current genus assignment see NITZ (2013) and ROWSON et al. (2014). Limacus maculatus (Kaleniczenko, 1851) – for the first time recorded in Moravia in 2019, see ČEJKA et al. (2020). Lehmannia carpatica Hutchinson, Reise & Schlitt, 2022 – originally reported as L. nyctelia (Bourguignat, 1861) and later also as Ambigolimax nyctelius (Bourguignat, 1861); see NITZ (2013) and ROWSON et al. (2014) for details. HUTCHINSON et al. (2022) noted that the name L. nyctelia (Bourguignat, 1861) was used for five different species and raised the new name for the Carpathian populations as L. carpatica, since the original name Limax nyctelius, based on the Algerian matrerial, is now to be known as Letourneuxia nyctelia (Bourguignat, 1861). Arion intermedius Normand, 1852 – for the first time recorded outdoors in Slovakia in 2020, see ČEJKA et al. (2021). Monacha claustralis (Rossmässler, 1834) – originally reported as Monacha cantiana (Montagu, 1803) by HLAVÁČ & PELTANOVÁ (2010); for further details see PIEŃKOWSKA et al. (2015b). Trochulus hispidus (Linnaeus, 1758) – T. sericeus (Draparnaud, 1801) was confirmed to be a part of phenotypic and genetic plasticity, now being recognized as a younger synonym of T. hispidus, see PROĆKÓW et al. (2017). Perforatella dibothrion (E. A. Bielz, 1860) – Helix dibothrion E. A. Bielz, 1860 is a conserved name by HAUSDORF (2019). Perforatella incarnata (O. F. Müller, 1774) – Monachoides incarnatus (O. F. Müller, 1774) was moved to the genus Perforatella Schlüter, 1838, see ADAMCOVÁ et al. (2024). Perforatella vicina (Rossmässler, 1842) – Monachoides vicinus (Rossmässler, 1842) was moved to the genus Perforatella Schlüter, 1838, see ADAMCOVÁ et al. (2024). Hygromia cinctella (Draparnaud, 1801) – for the first time recorded in Slovakia in 2015, see ČEJKA (2015a) and KRUMPÁLOVÁ & HOLIENKOVÁ (2018). Helicopsis striata (O. F. Müller, 1774) – a viable population was found in Prague, see PODROUŽKOVÁ et al. (2021). Cepaea nemoralis (Linnaeus, 1758) – for the first time recorded in Slovakia in 2015, see ČEJKA (2015a) and KRUMPÁLOVÁ & HOLIENKOVÁ (2018). Caucasotachea vindobonensis (C. Pfeiffer, 1828) – see NEIBER et al. (2016). Cornu aspersum (O. F. Müller, 1774) – for the first time recorded in Slovakia in 2015, see ČEJKA (2015b). For the first time recorded in Moravia in 2020, see ČEJKA et al. (2021). Helix thessalica Boettger, 1886 – see KORÁBEK et al. (2016b). Unio nanus Lamarck, 1819 – see LOPES-LIMA et al. (2024). Unio nanus was not comfirmed in Moravia yet. Corbicula fluminea (O. F. Müller, 1774) – for the first time recorded in Moravia in 2018, see KOMZÁK et al. (2018). Sphaerium lacustre (O. F. Müller, 1774) – see BESPALAYA et al. (2023). Euglesa casertana (Poli, 1791) – see BESPALAYA et al. (2023). Euglesa globularis (Clessin, 1873) – see BESPALAYA et al. (2023). Euglesa henslowana (Sheppard, 1825) – see BESPALAYA et al. (2023). Euglesa hibernica (Westerlund, 1894) – see BESPALAYA et al. (2023). Euglesa milium (Held, 1836) – see BESPALAYA et al. (2023). Euglesa nitida (Jenyns, 1832) – see BESPALAYA et al. (2023). Euglesa obtusalis (Lamarck, 1818) – see BESPALAYA et al. (2023). Euglesa personata (Malm, 1855) – see BESPALAYA et al. (2023). Euglesa pseudosphaerium (J. Favre, 1927) – the authorship should be ascribed to Favre, see BANK (2011). See BESPALAYA et al. (2023). 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