The European species of the genus Lebertia Neuman, 1880 are revised based on a study of available types and additional material from museum collections and recent field work, mostly done in the southern part of the continent. The taxonomic significance of all morphological character states considered as diagnostic by former authors is reevaluated in light of a detailed analysis of the variability of these characters in L. fimbriata. The subgenus Mixolebertia is redefined, the subgenus Pseudolebertia is synonymized with Lebertia sensu strictu. The synonymy of Hexalebertia with Mixolebertia, proposed by previous authors but not generally accepted is confirmed. Eolebertia nov. subgen. is proposed in order to accommodate L. elsteri and a species new to science. Descriptions and diagnoses are provided for all recognized species. Neotypes are designated for two species (L. fimbriata and L. brevipora) and lectotypes for 16 species (L. apposita, L. bracteata, L. bisbisetosa, L. crenophila, L. dalmatica, L. hispanica, L. holsatica, L. jadrensis, L. longipalpis, L maculosa, L. purpurea, L. rivulorum, L. schechteli, L. semireticulata, L. silesiaca and L. subtilis). Four subspecies are elevated to species rank (with their former stem species in parentheses): L. reticulata Koenike, 1912 (rufipes); L. rubella K. Viets, 1926 (tuberosa); L. excellens Lundblad, 1956a (tenuicollis); L. nitida Motaş & Tanasachi, 1963 (holsatica). Due to insufficient documentation, 21 taxa are considered as species incertae: L. tauinsignita (Lebert, 1879); L. longipes Monti, 1904; L. walteri Thor, 1906; L. costata Koenike, 1908; L. sigthori Maglio, 1908; L. duricoria Koenike, 1911; L. saxonica Thor, 1911; L. inflexa Thor, 1913; L. gladiator Thor, 1913; L. multicincta Thor, 1914; L. komareki Thor, 1914; L. schechteli globifera Thor, 1914; L. lacustris Koenike, 1914; L. aspera Walter, 1922; L. incognita K. Viets, 1922; L. pulchella K. Viets, 1925; L. monardi Migot, 1926; L. pyrenaica Migot, 1926; L. dresdensis K. Viets, 1928; L. elliptica Husiatinschi, 1937and L. cylindrata Bader, 1955. The following synonymies proposed by former authors are rejected: L. aberrata K. Viets, 1922 = L. cuneifera Walter, 1922: Schwoerbel 1955a (separate species) L. algeriensis Lundblad, 1942 = L. inaequalis: Besseling 1956 (separate species) L. contracta Thor, 1900 = L. densa (?): K. Viets & K. O. Viets 1960 (separate species) L. cylindrata Bader, 1955 = L. semireticulata K. Viets, 1925: Lundblad 1956a (species incerta) L. giardinai Maglio, 1908 = L. robusta Walter, 1922: Bader 1975 (priority; L. robusta = L. fontana) L. maculosa Koenike, 1902 = L. zschokkei Koenike, 1902: Lundblad 1962 (priority; vice versa) L. pallida Láska, 1954 = L. sparsicapillata Thor, 1905: Láska 1963 (= L. pusilla) L. stigmatifera separata Lundblad, 1930 = L. stigmatifera: Lundblad 1962 (separate species) L. zachariasi Koenike, 1912 = L. rufipes Koenike, 1902: Bader 1975 (= L. reticulata). The following 42 new synonyms are proposed: L. acuta minor Láska, 1954 = L. maglioi Thor, 1907 L. affinis Sokolow, 1927 = L. fimbriata Thor, 1899 L. apposita Láska, 1954 = L. maglioi Thor, 1907 L. arndti K. Viets, 1926 = L. maculosa Koenike, 1902 L. balcarica Sokolow, 1940a (err.: balcaria K. O. Viets 1987) = L. maglioi Thor, 1907 L. barsica Szalay, 1937 = L. haliki K. Viets, 1928 L. berlesei Thor, 1926 = L. oudemansi Koenike, 1898 L. caucasica cubanica Sokolow, 1940a = L. porosa Thor, 1900 L. corsica E. Angelier, 1954 = L. sparsicapillata Thor, 1905 L. rufipes cylindrica Láska, 1952 = L. sparsicapillata Thor, 1905 L. densa Koenike, 1902 = L. dubia Thor, 1899 L. dubiaeformis Sokolow, 1930 = L. helvetica Thor, 1906 L. extendens Walter, 1922 = L. fontana Walter, 1912 L. gracilipes Walter, 1922 = L. giardinai Maglio, 1908 L. husmanni K. Viets, 1955 = L. maglioi Thor, 1907 L. inversa Koenike, 1919 = L. cognata Koenike, 1902 L. longiepimerata Láska, 1953 = L. sparsicapillata Thor, 1905 L. multipilosa Thor, 1926 = L. natans K. Viets, 1926 L. neocomensis Bader, 1955 = L. longiseta Bader, 1955 L. obesa K. Viets, 1925 = L. cognata Koenike, 1902 L. olonensis Sokolow, 1930 = L. pusilla Koenike, 1911 L. pallida Láska, 1954 = L. pusilla Koenike, 1911 L. pseudotuberosa Bader, 1975 = L. maculosa Koenike, 1902 L. quadripora Koenike, 1903 = L. inaequalis Koch, 1837 L. robusta Walter, 1922 = L. fontana Walter, 1912 L. rufipes cylindrica Láska, 1952 = L. sparsicapillata Thor, 1905 L. schischkoffi K. Viets, 1926 = L. maculosa Koenike, 1902 L. schmidtii Thor, 1911 = L. halberti Koenike, 1902 L. scutellata K. O. Viets, 1955 = L. maglioi Thor, 1907 L. sefveoides Schwoerbel, 1962 = L. giardinai Maglio, 1908 L. shadini Sokolow, 1940 ( L. subtilis var. Sokolow, 1925) = L. oblonga Koenike, 1911 L. silesiaca Láska, 1955 = L. pusilla Koenike, 1911 L. slovenica Láska, 1954 = L. rufipes Koenike, 1902 L. stackelbergi saxicola Sokolow, 1936 = L. porosa Thor, 1900 L. sublitoralis Walter, 1922 = L. oblonga Koenike, 1911 L. tenuistriata K. Viets, 1936 = L. fimbriata Thor, 1899 L. tuberosa Thor, 1914 = L. schechteli Thor, 1913 L. wackeri Bader, 1955 = L. inaequalis Koch, 1837 L. westfalica Koenike, 1919 = L. sparsicapillata Thor, 1905 L. zachariasi Koenike, 1912 = L. reticulata Koenike, 1919 L. zermattensis Walter, 1922 = L. maculosa Koenike, 1902 L. zschokkei Koenike, 1902 = L. maculosa Koenike, 1902 For seven species previously known only from specimens of one sex, the corresponding male or female is described for the first time: L. bulgariensis (♀), L. excellens (♀), L. halberti (♀), L. macilenta (♂), L. natans (♂), L. oblonga (♀), L. semireticulata (♂). Nine species are described as new to science: Lebertia (s. str.) aroania from a spring in the Peloponnese; L. (s. str.) variolata from streams in Sicily and Cyprus; L. (s. str.) intronata from springs in the Central-Western Mediterranean area; L. (s. str.) vegacabrerae from a stream on Tenerife, L. (Mixolebertia) helocrenica from springs in the Italian Alps and Bavarian prealps; L. (Mixolebertia) oxa from springs and interstitial habitats in Sicily; L. (Mixolebertia) mediterranea from springs in the Mediterranean area; L. (Brentalebertia) hupalupu from a spring stream on Gomera, and L. (Eolebertia) danielei from lowland springs in N Italy. A dichotomous key is provided for all recognized European species.weiterlesen