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Barracudasaurus maotaiensis

Reptilia - Mixosauridae

Taxonomy
Mixosaurus maotaiensis was named by Young (1965). Its type specimen is IVPP V.2468, a partial skeleton, and it is not a trace fossil. Its type locality is Jenhui, which is in a Triassic marine limestone in China.

It was considered a nomen dubium by Motani (1999) and McGowan and Motani (2003); it was recombined as Barracudasaurus maotaiensis by Jiang et al. (2005).

Synonymy list
YearName and author
1965Mixosaurus maotaiensis Young p. 368 figs. 1-2
2005Barracudasaurus maotaiensis Jiang et al. pp. 870-878 figs. 2, 4

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
RankNameAuthor
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
Ichthyosauromorpha
Ichthyosauriformes
Ichthyopterygia(Owen 1840)
Eoichthyosauria
Ichthyosauria(de Blainville 1835)
Hueneosauria
familyMixosauridaeBaur 1887
genusBarracudasaurus
speciesmaotaiensis()

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.

Diagnosis
ReferenceDiagnosis
D.-Y. Jiang et al. 2005"Potential autapomorphies of Barracudasaurus include the following. Premaxillary teeth with rounded cross-section, elongate, conical and pointed, very widely spaced and apparently few in number (probably < 15). Maxillary teeth larger than premaxillary teeth. Anterior maxillary teeth robust, conical and bluntly pointed. Posterior maxillary teeth with anteroposteriorly slightly elongated cross-section, very short, robust and blunt. Humerus without postaxial facet, radial facet slopes distinctly anteroproximally. Coracoid with reduced posterior extension. Interclavicle of triangular shape. Clavicle slender, probably without medial thickening. Plesiomorphic features which aid in identification include the following. Small mixosaurid, skull length does not exceed 250 mm. Teeth subthecodontously implanted, roots show labyrinthodont infolding. All teeth show strong distinct apicobasal ridges. Maxilla short anteriorly. Postorbital skull segment long, about one-half the diameter of the orbit. A ventral extension of the postorbital covers the postorbital process of the jugal laterally. A deep postjugal incisure (jugal-quadratojugal notch) is present, bordered dorsally by the quadratojugal, squamosal and postorbital. No external contact between jugal and quadratojugal. Jugal very slender and fragile. Postorbital separates postfrontal and supratemporal. Sagittal crest low but extending anterior to the external naris. No postaxial ossifications of the forefin."