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Manemergus anguirostris

Reptilia - Sauropterygia - Polycotylidae

Taxonomy
Manemergus anguirostris was named by Buchy et al. (2005). Its type specimen is SMNK-PAL 3861, a partial skeleton (skeleton lacking both forelimbs, both hindlimbs except for the left femur and some phalanges, parts of both girdles, and the terminal caudal vertebrae (includes), and it is a 3D body fossil. Its type locality is North of Goulmima (Unit 4), which is in a Turonian open shallow subtidal limestone in the Akrabou Formation of Morocco. It is the type species of Manemergus.

Synonymy list
YearName and author
2005Manemergus anguirostris Buchy et al. pp. 101-111 figs. 1-3, 5-9

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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()
orderSauropterygia
Pistosauria(Baur 1890)
Plesiosauria(de Blainville 1835)
superfamilyPlesiosauroideaWelles 1943
Cryptoclidia
Xenopsaria
Leptocleidia
familyPolycotylidaeWilliston 1908
genusManemergus
speciesanguirostris

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
M. -C. Buchy et al. 2005A polycotylid plesiosaurs differing from all other polycotylid taxa in the following combination of features: the rostrum represents about 55% of skull length. The rostrum is hemicylindrical over its rostral half. The postorbital segment is subrectangular in dorsal view. The temporal bar is as high as the orbit. The suspensorium is vertical. The squamosal forms a dorsal shelf overhanging the atlas and axis. A paired frontal foramen is present and lies level with the rostral margin of the orbits. It is bordered laterally by the prefrontal. The facial process of the premaxilla regularly tapers caudally, contacting the parietal level with the caudal margin of the external naris. The teeth are unifrom in size and slender (the estimated ratio of the crown to its basal diameter is 5), smooth except for a possible faint rostral carina (the tooth shape may be a juvenile feature). The tooth formula is: 5 premaxillary, 10 maxillary, 15 dentary teeth inclding 9 symphysial teeth. There are 25 cervical, 3 pectoral, and about 1 dorsal vertebrae. In its cranial portion, the interclavicle is expanded laterally, possessing wings that contact the clavicle. The interclavicle is restricted caudally to a rod-like median process.