|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Reptilia - Ophthalmosauridae
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|A. J. Robert et al. 2014||A moderately sized ophthalmosaurid (estimated body length of 3-4 meters) possessing the following autapomorphies (marked with *) and unique character combinations: maxilla with extensive lateral exposure (short in Ophthalmosaurus and Aegirosaurus); lacrimal contributes to the posterior margin of the external naris (excluded in Cryopterygius and Athabascasaurus); posterodorsal process of jugal forming half of the posterior margin of the orbit (does not form any of the margin in Cryopterygius); narrow postorbital bar (broad in Cryopterygius, Athabascasaurus and Brachypterygius); absence of a squamosal (present in Athabascasaurus and Aegirosaurus); extremely gracile and constricted stapedial shaft*; reduced ophisthotic facet on the basioccipital (large in Palvennia); presence of an angular-articular contact*; extremely gracile dentition (more robust in Cryopterygius and Brachypterygius); interclavicle with an interclavicular trough and ventral foramen*; proximodistal length of scapula very reduced in comparison to coracoid length*; humerus with three distal facets (two in Nannopterygius and Cryopterygius); ulna is the largest element of zeugopodium (radius is larger in Cryopterygius); anterodorsal process of the ilium*; ischiopubis completely fused and lacking an obturator foramen (unfused distally in Cryopterygius and Undorosaurus and oburator foramen present in Ophthalmosaurus); femur with two distal facets (three in Platypterygius americanus and Platypterygius australis).|