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Chirotherium rex

Reptilia - Chirotheriidae

Taxonomy
Chirotherium rex was named by Peabody (1948). It is considered to be a form taxon. Its type specimen is UCMP 37782, a footprint, and it is a trace fossil. Its type locality is UCMP V3856, Cameron, which is in an Aegean/Bithynian terrestrial mudstone in the Moenkopi Formation of Arizona.

Synonyms
Synonymy list
YearName and author
1948Chirotherium moquiensis Peabody pp. 374-375 figs. 26; Pl. 42D
1948Chirotherium rex Peabody p. 380 figs. Pl. 43
1952Chirotherium rex Bock p. 411
1958Chirotherium moquiensis Kuhn p. 21
1958Chirotherium rex Kuhn p. 21
1969Chirotherium moquinense Haubold p. 93 fig. 3
1969Chirotherium rex Haubold p. 93 fig. 3
1972Chirotherium moquinense Demathieu and Haubold p. 805
1972Chirotherium rex Demathieu and Haubold p. 805
1987Chirotherium moguinensis Conrad et al. p. 131
1987Chirotherium rex Conrad et al. p. 131
2010Chirotherium rex Klein and Lucas pp. 37, 46

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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
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
Pseudosuchia(Zittel 1890)
familyChirotheriidaeAbel 1935
genusChirotheriumKaup 1835
speciesrex

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
F. E. Peabody 1948Footprints of a giant chirotheriid somewhat larger than C. moquiensis; pes length over 33 cm., but otherwise similar to C. moquiensis, except for claw impressions on pes digits I-IV whieh are rounded or spatulate-like instead of triangular; manus is hooflike with wide, stubby digits and with a strong claw on digit V.
F. E. Peabody 1948 (Chirotherium moquiensis)The footprints represent a giant chirotheriid of bulky foot structure; pes length 30 cm.; digits heavily padded, digits II-IV showing proximal and distal pads; pes digit V massive, with massive, elongate, metatarsal pad and strongly developed phalan­geal portion, pes digit IV shorter than III and subequal to II, and with weakly impressed base; manus relatively large and wide, with digit V often weakly impressed; claws trian­gular in outline.