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Megalancosaurus

Reptilia - Drepanosauridae

Synonymy list
YearName and author
1981Megalancosaurus Calzavara et al.
1988Megalancosaurus Carroll
1994Megalancosaurus Renesto
2000Megalancosaurus Renesto
2004Megalancosaurus Senter p. 260
2005Megalancosaurus Renesto and Dalla Vecchia
2006Megalancosaurus Dalla Vecchia
2010Megalancosaurus Renesto et al. p. 59

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
RankNameAuthor
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
Drepanosauromorpha
familyDrepanosauridae
Megalancosaurinae
genusMegalancosaurus

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. Calzavara et al. 1981Reptile of small size, with triangular diapsid skull and a large semielliptical naris; premaxilla with a "beak-like" tip of the snout; trapezoidal preorbital opening; large subcircular orbital; small upper and probably large lower temporal opening; jugal triradiate; about 30 teeth in each part of the upper and 25 teeth in the lower jaw; dentition thecodont or prothecodont; teeth small, sharp pointed and isodont; fore-limbs of remarkable size, lower arm elongated; hand with 3 or ?4 carpalia and 5 digits with the phalanx formula 2-2-3-3-3; claws hooked, large and sharp pointed; first 3 digits probably opponible to the other 2; 6 cervical vertebrae, 4 of them elongated; pubis rod-like, elongated and approached to the ischium.