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Eocursor parvus

Reptilia - Heterodontosauridae

Taxonomy
Eocursor parvus was named by Butler et al. (2007). Its type specimen is SAM-PK-K8025, a partial skeleton, and it is a 3D body fossil. Its type locality is farm Damplaats (55), Ladybrand, which is in a Hettangian/Sinemurian dry floodplain siltstone/sandstone in the Elliot Formation of South Africa. It is the type species of Eocursor.

Synonymy list
YearName and author
2007Eocursor parvus Butler et al. pp. 2041-2042 figs. 1-2
2009Eocursor parvus Butler and Sullivan p. 22
2010Eocursor parvus Butler
2012Eocursor parvus Han et al. p. 1391 fig. 14
2014Eocursor parvus Delsate and Ezcurra p. 178
2016Eocursor parvus Griffin and Nesbitt p. 6

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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
Sauropsida
classReptilia
subclassEureptilia()
RankNameAuthor
Romeriida
Diapsida()
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
familyHeterodontosauridae
genusEocursor
speciesparvus

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
R. J. Butler et al. 2007A basal ornithischian distinguished by the following autapomorphies: accessory fossa present on lateral surface of basisphenoid, posterior to the canal for the internal carotid artery; maximum transverse expansion of the distal end of the humerus is only 50% of maximum transverse expansion of proximal humerus; and pubic obturator foramen subcircular and enlarged (maximum dorsoventral diameter of foramen is twice the maximum diameter of proximal pubic shaft). Eocursor can additionally be distinguished from all other basal ornithischian taxa by a unique combination of derived and plesiomorphic features.