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Gilmoreteius

Reptilia - Squamata - Polyglyphanodontidae

Synonymy list
YearName and author
1943Macrocephalosaurus Gilmore p. 362 fig. 1–2
1975Macrocephalosaurus Sulimski p. 28
1983Macrocephalosaurus Estes
1988Macrocephalosaurus Carroll
1991Macrocephalosaurus Gao and Fox
1993Macrocephalosaurus Alifanov p. 10
1998Gilmoreteius Langer p. 16
2000Macrocephalosaurus Alifanov p. 373
2000Macrocephalosaurus Gao and Norell p. 70
2011Macrocephalosaurus Benson p. 289 fig. 3
2014Gilmoreteius Xu et al.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
RankNameAuthor
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Lepidosauromorpha(Benton 1983)
superorderLepidosauria()
orderSquamata
Episquamata
ToxicoferaVidal and Hedges 2005
PolyglyphanodontiaAlifanov 2000
familyPolyglyphanodontidaeGilmore 1942
genusGilmoreteius

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
A. Sulimski 1975 (Macrocephalosaurus)Dental formula pm4+m24-25/d26-28. Length of skulls from 70 to 120 mm. Maxillary segment much more prominent than the occipital one. External nares large, obliquely situated. Premaxilla with a long dorsal process. Septomaxilla well developed. Maxilla vertically arranged in relation to the naso-prefrontal and palatal regions. Nasals unfused, nearly equilateral. Frontals unfused, long, with weak orbital excavations. Sculpture of roofing bones weakly developed. Parietal short, but wide, with long posterior processes arranged at an angle of about 60-95°. Descending processes of frontals developed as low oblong borders. Prefrontal large, trapezoidal in outline with considerable lateral crest. Postfrontal short, forked proximally and distally, with a well developed parietal process. Orbits very large, anteroposteriorly distinctly elongated. Jugal with a strong, sharply pointed postero-ventral process. Postorbital anteroposteriorly much elongated, dorsoventrally flattened, reaching the posterior border of the upper temporal fossa. Upper temporal fossa considerably smaller than the orbit, anteroposteriorly elongated, narrowing towards the back. Parietal foramen entirely within parietal or close, or on the fronto-parietal suture. Suborbital fenestrae in the form of small hollows with a perforation or completely overgrown bybone. Coronoid process well developed, small, vertical or directed slightly backwards. Subpleurodont or pleurodont dentition with considerably enlarged canine-like anterior teeth of maxilla. Cheek teeth lateromedially flattened, without distinct denticles or well denticulated on the cutting edges. Metakinetism well marked, mesokinetism much limited.
R. B. J. Benson 2011 (Macrocephalosaurus)Dentition acrodont, heterodont, with much enlarged anterior maxillary teeth, having flattened crowns; postfrontal absent, pineal foramen entirely within the parietal; jugal with a strong posteriorly directed process. Orbits large, ovate.