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Polyglyphanodontidae

Reptilia - Squamata - Polyglyphanodontidae

Synonyms
Synonymy list
YearName and author
1942Polyglyphanodontidae Gilmore p. 230
1972Adamisauridae Sulimski
1975Polyglyphanodontidae Sulimski p. 77
1983Polyglyphanodontinae Estes
1998Polyglyphanodontinae McCord p. 285
1999Polyglyphanodontinae Nydam p. 307
2000Adamisauridae Alifanov p. 376
2000Polyglyphanodontinae Gao and Norell p. 52
2007Polyglyphanodontinae Nydam et al. p. 540
2014Polyglyphanodontidae Xu et al.
2015Polyglyphanodontidae Reeder 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
familyPolyglyphanodontidaeGilmore 1942

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 1975Dental formula pm2-3+m18/d18-19. Skull triangular in outline, deep,
anteroposteriorly elongated with slightly tapering snout. Cheek teeth morphology variable – crowns transversely expanded, diagonally arranged to the longitudinal jaw axis or normally situated with latero-medial flattening. Cutting edges transverse, harp or with 5-6 or more, low, bluntly pointed cusps. Tooth replacement of agamid or iguanid type. Subacrodont, subpleurodont to pleurodont implantation. Resorption pits at tooth bases poorly or well developed. Anterior teeth small, conical with round shafts, unicuspid and bluntly pointed. Canine-like teeth in maxilla absent. Posterior cheek teeth reduced in size. Premaxilla and parietal, and sometimes frontals, fused. Nasals anteroposteriorly elongated, nearly rectangular or triangular in shape. Frontals strap shaped of almost equal width for their whole length, relatively short or widened posteriorly and narrowed anteriorly, sculptured. Lateral descending ridges of frontals low. Parietal very short, wide, transversely constricted or long, widened anteriorly. Parietal foramen in fronto-parietal suture or in parietal bone. Naso-prefrontal region not expanded. Prefrontal and postfrontal not in contact above the orbit. Lacrimal small with one foramen. Maxilla deep, triangular in shape, slightly sloping dorsally toward the midline. Contact between maxilla and frontal absent. Jugal with long, sharply pointed postero-ventral spur or with short, bluntly ended tuber. Postfrontal trapezoidal in shape or with proximally and distally forked processes. Postorbital arch composed by postfrontal and antero-dorsal part of postorbital or by post-frontal only. Postorbital with short, wide posterior process not-extending to posterior end of supratemporal fossa. Squamosal long, dorsoventrally deep and with squarely truncate posterior end or wide, short and triangular in shape. Supratemporal bone small, squamous, or completely reduced. Supratemporal fossa relatively large and roughly triangular. Vomeronasal organ separated. Vomers, palatines and pterygoids toothless. Suborbital fenestra reduced in size, small and anteroposteriorly elongated. Lower jaw strong, slender, not high in angular region. Surangular short and deep. Diagonal external ridge on surangular present. Splenial large, almost completely covers the Meckelian groove. Coronoid process high with the top decidedly or slightly backwards bending. Retroarticular process wide and massive. Vertebrae procoelous with tapering centra. Zygospheno-zygantral articulation present. 8 cervicals and 21 presacrals. Autotomy septa present. Clavicles not expanded, perforated. Interclavicle cruciform .with bifurcated anterior process. Ilium with rectangular upper extremity. Ischium and pubis iguanid-Iike in structure. Limbs moderately long. Osteodermal structures not present.