Arthropterygius

Arthropterygius; Temporal range: Kimmeridgian–？Berriasian; ~
	Cranial elements of A. chrisorum
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	†Ichthyosauria
Family:	†Ophthalmosauridae
Genus:	†Arthropterygius; Maxwell, 2010
Type species
	†Arthropterygius chrisorum; (Russel, 1993 [originally Ophthalmosaurus])
Other species
	†?A. hoybergeti (Druckenmiller et al., 2012); †?A. lundi (Roberts et al., 2014); †A. volgensis (Kasansky, 1903); †A. thalassonotus (Campos et al. 2019);
Synonyms
	?Janusaurus Roberts et al., 2014; ?Keilhauia (Delsett et al., 2017); ?Palvennia Druckenmiller et al., 2012; Ophthalmosaurus chrisorum Russel, 1993; Ichthyosaurus volgensis Kasansky, 1903;

Arthropterygius is a widespread genus of ophthalmosaurid ichthyosaur which existed in Canada, Norway, Russia, and Argentina from the late Jurassic period and possibly to the earliest Cretaceous.

Arthropterygius Temporal range: Kimmeridgian–？Berriasian ~

Cranial elements of A. chrisorum
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	†Ichthyosauria
Family:	†Ophthalmosauridae
Genus:	†Arthropterygius Maxwell, 2010
Type species
†Arthropterygius chrisorum (Russel, 1993 [originally Ophthalmosaurus])
Other species
†?A. hoybergeti (Druckenmiller et al., 2012) †?A. lundi (Roberts et al., 2014) †A. volgensis (Kasansky, 1903) †A. thalassonotus (Campos et al. 2019)
Synonyms
?Janusaurus Roberts et al., 2014 ?Keilhauia (Delsett et al., 2017) ?Palvennia Druckenmiller et al., 2012 Ophthalmosaurus chrisorum Russel, 1993 Ichthyosaurus volgensis Kasansky, 1903