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Yaguarasaurinae
Taxonomy
Yaguarasaurinae was named by Palci et al. (2013). It was considered monophyletic by Palci et al. (2013).
It was assigned to Mosasauridae by Palci et al. (2013) and Driscoll et al. (2019).
It was assigned to Mosasauridae by Palci et al. (2013) and Driscoll et al. (2019).
Subtaxa
Synonymy list
Year | Name and author |
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2013 | Yaguarasaurinae Palci et al. |
2019 | Yaguarasaurinae Driscoll et al. |
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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.
Subfm. †Yaguarasaurinae Palci et al. 2013
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G. †Romeosaurus Palci et al. 2013
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†Romeosaurus fumanensis Palci et al. 2013
†Romeosaurus sorbinii Palci et al. 2013
Diagnosis
Reference | Diagnosis | |
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A. Palci et al. 2013 | Small- to medium-sized mosasauroid lizards characterized by the following unique combination of anatomical features: frontals not invaded by posterior end of nares (i.e., lack of distinct narial emargination on frontals); jugal rami form a 90° angle and produce a distinct posteroventral process at their junction; quadrate ala forms a shallow concavity; medial parapet of dentary (dentary medial shelf) low, tooth roots largely exposed in medial view; dentary has a projection anterior to the first tooth (reversed in Russellosaurus).
Features that are shared by Romeosaurus and Russellosaururs to the exclusion of Yaguarasaurus include quadrate bone subcircular in lateral view and bearing distinct groove along the dorsal margin of the tympanic ala; distal portion of ectopterygoid process of pterygoid distinctly angled anterolaterally and bearing longitudinal grooves and ridges for articulation with ectopterygoid (this feature cannot be observed in Yaguarasaurus due to poor preservation; however, it may be present in this taxon as well, as suggested by our most parsimonious phylogenetic reconstruction); ‘V’-shaped suture line between surangular and articular; retroarticular process lies in a subvertical plane (i.e., lacks medial inflection); and anteromedial, posteromedial, and posterodorsal processes of coronoid very weakly developed. |