Author Contenent Country Date Period Genus Aardeson NA USA - MN 1901 Silurian Leptaena Alexander NA USA - TN 1993 Devonian Leptaena Alexander NA USA - IN 1992 Ordovician Leptaena Alichova Europe Russia 1969 Ordovician Leptaena Ami NA Canada 1894 Ordovician Leptaena Amsden NA USA - OK 1963 Devonian Leptaena Amsden NA USA - OK 1951 Silurian Leptaena Amsden NA USA - TN 1949 Silurian Leptaena Angelin Europe Sweden 1880 Silurian Leptaena Armstrong NA USA - AZ 1960 Carboniferous Leptaena Asselberghs Europe Belgium 1913 Devonian Leptaena Austin NA USA - OH 1927 Ordovician Leptaena Baarli Europe Norway 1986 Ordovician Leptaena Baarli Europe Norway 1995 Silurian Leptaena Bancroft Europe Wales 1949 Silurian Leptaena Barnes NA USA-TX 1966 Silurian Leptaena Barrande Europe Czech 1847 Silurian Leptaena Barrett NA USA - NJ 1878 Silurian Leptaena Barrois Europe France 1877 Devonian Leptaena Bendarchyk Europe Poland 1868 Ordovician Leptaena Benedetto SA Venezuela 1985 Devonian Leptaena Benedetto SA Argentina 1995 Silurian Leptaena Benson Asia Australia 1913 Carboniferous Leptaena Bevan Europe Wales 1858 Carboniferous Leptaena Biernat Europe Poland 1966 Devonian Leptaena Blodgett NA USA - AK 1988 Silurian Leptaena Borghi Africa Lybia 1939 Devonian Leptaena Boucot NA Canada 1986 Devonian Leptaena Boucot NA USA - NH 1960 Devonian Leptaena Boucot NA USA - NY 1959 Devonian Leptaena Boucot NA Canada 1966 Silurian Leptaena Boucot NA USA - CA 1988 Silurian Leptaena Boucot NA USA - ME 1973 Silurian Leptaena Boucot NA USA - NH 1963 Silurian Leptaena Boucot SA Venezuela 1977 Silurian Leptaena Branson NA USA - MO 1938 Carboniferous Leptaena Bretz NA USA - IL 1939 Silurian Leptaena Breviel Europe Russia 1988 Silurian Leptaena Brice Asia Afganistan 1971 Devonian Leptaena Brousmiche Africa Morocco 1975 Devonian Leptaena Caster SA Colombia 1939 Devonian Leptaena Chi-Thuan Asia Laos 1967 Carboniferous Leptaena Clarke SA Argentina 1912 Devonian Leptaena Cleaves NA USA - PA 1939 Devonian Leptaena Cocks Europe England 1982 Devonian Leptaena Cocks Europe England 1988 Silurian Leptaena Coltreau Africa Algeria 1940 Devonian Leptaena Cook Asia Australia 1990 Devonian Leptaena Cooper NA USA - VA 1946 Devonian Leptaena Croneis NA USA - MO 1931 Devonian Leptaena Dadeev Europe Russia 1960 Carboniferous Leptaena Dahmer Europe Germany 1952 Ordovician Leptaena Demenet Europe Belgium 1934 Carboniferous Leptaena Deslongchamps Europe France 1853 Jurassic Leptaena Dwight NA USA - NY 1879 Ordovician Leptaena Foerste NA USA - MI 1917 Ordovician Leptaena Gabb NA USA - VA 1860 Triassic Leptaena Gaertner Europe Alps 1930 Devonian Leptaena Gemmellaro Europe Italy 1886 Jurassic Leptaena Giebel Europe Germany 1858 Silurian Leptaena Gigout Africa Morocco 1951 Carboniferous Leptaena Girty NA USA - AK 1915 Carboniferous Leptaena Gortani Europe Italy 1907 Devonian Leptaena Gray Europe Scotland 1869 Jurassic Leptaena Harker NA Canada 1953 Carboniferous Leptaena Harper Europe Scotland 1982 Ordovician Leptaena Hou Asia China 1959 Devonian Leptaena Imbrie NA USA - MI 1959 Devonian Leptaena James NA USA - OH 1874 Silurian Leptaena Johnson NA USA - NV 1973 Silurian Leptaena Jongmans Africa Egypt 1955 Carboniferous Leptaena Keyserling Europe Russia 1848 Permian Leptaena Kindle NA USA - CO 1909 Devonian Leptaena Koninck Europe Belgium 1841 Carboniferous Leptaena Kozlowski Europe Poland 1929 Silurian Leptaena Lehmann NA USA - PA 1989 Ordovician Leptaena Loweneck Asia Tien Shan 1832 Permian Leptaena Malaise Europe Belgium 1900 Silurian Leptaena Marr Europe Wales 1885 Cambrian Leptaena Mathieu Europe France 1959 Silurian Leptaena Maynard NA USA - MD 1913 Devonian Leptaena McCoy Europe England 1852 Carboniferous Leptaena Mellado Africa Spanish Sahara 1948 Devonian Leptaena Mendez-Alzola SA Uruguay 1934 Devonian Leptaena Mikulas Europe Czech 1984 Ordovician Leptaena Minato Asia Japan 1952 Carboniferous Leptaena Mueller Europe Spain 1924 Devonian Leptaena Muir-Wood Asia Malasia 1948 Carboniferous Leptaena Murban Europe Austria 1938 Ordovician Leptaena Nalwkin Asia Turkestan 1930 Devonian Leptaena Neuman NA USA - ME 1963 Ordovician Leptaena Ohno Asia Japan 1977 Devonian Leptaena Opik Europe Estonia 1954 Ordovician Leptaena Parkes Europe Ireland 1994 Ordovician Leptaena Plummer NA USA - TX 1950 Carboniferous Leptaena Poulsen NA Greenland 1943 Silurian Leptaena Reed Asia India 1908 Devonian Leptaena Reed Asia India 1912 Silurian Leptaena Reid NA USA - TN 1983 Ordovician Leptaena Rominger NA Canada 1887 Cambrian Leptaena Ross NA USA - NV 1970 Ordovician Leptaena Rozman Asia Mongolia 1977 Ordovician Leptaena Rusconi SA Argentina 1954 Ordovician Leptaena Salter Europe Scotland 1851 Silurian Leptaena Sayar Asia Turkey 1960 Devonian Leptaena Schwarzbach Europe Poland 1949 Carboniferous Leptaena Sheehan NA Mexico 1975 Devonian Leptaena Sheehan Europe Belgium 1975 Ordovician Leptaena Simionescu Europe Romania 1925 Devonian Leptaena Sommer Europe Germany 1909 Carboniferous Leptaena Suneja Asia India 1979 Ordovician Leptaena Tchernysheva Asia Mongolia 1937 Devonian Leptaena Teichert NA Greenland 1936 Ordovician Leptaena Termier Africa Algeria 1950 Ordovician Leptaena Thomas NA USA - AK 1928 Silurian Leptaena Tolmatchoff Arctic 1926 Devonian Leptaena Veselinovic Europe Yugoslavia 1951 Jurassic Leptaena Villas Europe Spain 1985 Ordovician Leptaena Vinassa Europe Italy 1914 Ordovician Leptaena Waagen Asia Pakistan 1884 Permian Leptaena Watkins NA USA - WI 1993 Silurian Leptaena Weller NA USA - IA 1901 Carboniferous Leptaena Whitfield NA USA - VT 1868 Ordovician Leptaena Zhang Asia China 1983 Silurian Leptaena