Stenopterygius

Stenopterygius is an extinct genus of thunnosaur ichthyosaur known from Europe (England, France, Germany, Luxembourg and Switzerland).

==History== Stenopterygius was originally named by Quenstedt in 1856 as a species of Ichthyosaurus, I. quadriscissus. Otto Jaekel in 1904 reassigned it to its own genus, Stenopterygius. The type species is therefore Ichthyosaurus quadriscissus but the combinatio nova Stenopterygius quadriscissus. The generic name is derived from stenos, Greek for "narrow", and pteryx (πτερυξ), Greek for "fin" or "wing". The specific name means "split in four" referring to the presumed condition of the first finger.