Nannopterygius

Nannopterygius Temporal range: Middle to Late Jurassic, Callovian–Tithonian PreꞒ Ꞓ O S D C P T J K Pg N
Fossil
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	†Ichthyosauria
Node:	†Ophthalmosauria
Family:	†Ophthalmosauridae
Genus:	†Nannopterygius von Huene, 1922
Species:	† N. enthekiodon
Binomial name
Nannopterygius enthekiodon (Hulke, 1871)

Nannopterygius (meaning ″small wing/flipper″ in Greek) is a genus of ophthalmosaurid ichthyosaur that lived in the Middle to Late Jurassic (Callovian to Tithonian stages).^[1] Fossils have been found in England and Germany.^[2] The first specimen was found in the Kimmeridgian Kimmeridge Clay Formation of Kimmeridge Bay, Dorset, UK and described by Hulke in 1871, who named it Ichthyosaurus enthekiodon.^[3] A year earlier, Hulke had described some remains from the same horizon and locality that he thought were ichthyosaurian, naming them Enthekiodon (no species given).^[4] These are now lost, but Hulke considered them sufficiently similar to demote the name to species level.^[3] In 1922, Huene separated this species into the new genus Nannopterygius, named for the small fore- and hindpaddles.^[5]

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