Genus Leptaena Dalman, 1828

Type species: Leptaena rugosa, Dalman, 1828 .

Stratigraphic distribution: Llanvirnian to Pragian,?Emsian (Ordovician to Lower Devonian). Geographic distribution: cosmopolitan.

MIN 0001645.1-2

Leptaena rhomboidalis (Wilkins, 1769)

Locality: Ahler Hütte, Lahntal, Middle Rhine area, Germany Stratigraphy: Upper Emsian, upper Lower Devonian