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Dromomeron romeri

Reptilia - Lagerpetonidae

Taxonomy
Dromomeron romeri was named by Irmis et al. (2007). Its type specimen is GR 218, a set of limb elements, and it is not a trace fossil. Its type locality is Hayden Quarry, Ghost Ranch (site 3), which is in a Norian coarse channel fill conglomerate/siltstone in the Chinle Formation of New Mexico.

Synonymy list
YearName and author
2007Dromomeron romeri Irmis et al. p. 359 figs. 2A-D
2009Dromomeron romeri Martínez and Alcober p. 1
2009Dromomeron romeri Nesbitt et al. p. 499
2010Dromomeron romeri Langer et al. p. 58
2011Dromomeron romeri Nesbitt p. 45
2016Dromomeron romeri Griffin and Nesbitt p. 10

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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
RankNameAuthor
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
familyLagerpetonidae
genusDromomeron
speciesromeri

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
S. J. Nesbitt et al. 2009Differs from Dromomeron gregorii (see below) and all other basal dinosauromorphs in possessing the following autapomorphies: 1) absence of a distinct ridge for the attachment of the M. caudifemoralis longus (=4th trochanter); 2) presence of a sharp ridge on the anteromedial edge of the distal end of the femur; 3) presence of a lateral tuberosity on the anterolateral edge of the distal end of the femur; and 4) a large crest on the anteromedial edge of the astragalus and associated anteromedial concavity on the distal tibia.