According to Martill & (1991): ‘A number of fish from the Lower Oxford Clay of Christian Malford, Wiltshire, Peterborough, Cambridgeshire, and from the Argile de Dives of Normandy, France, have been referred to Leptolepis. The genus Leptolepis has been extensively reviewed due to the key position attributed to these fishes in early teleost evolution. The Oxford Clay 'Leptolepis' are rarely well enough preserved for detailed relationships to be established. For this reason it is best to refer to Egerton's L. macrophthalmus as 'Leptolepis' macrophthalmus.’