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Chirotherium rex
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
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Synonymy list
Year | Name and author |
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1948 | Chirotherium moquiensis Peabody pp. 374-375 figs. 26; Pl. 42D |
1948 | Chirotherium rex Peabody p. 380 figs. Pl. 43 |
1952 | Chirotherium rex Bock p. 411 |
1958 | Chirotherium moquiensis Kuhn p. 21 |
1958 | Chirotherium rex Kuhn p. 21 |
1969 | Chirotherium moquinense Haubold p. 93 fig. 3 |
1969 | Chirotherium rex Haubold p. 93 fig. 3 |
1970 | Chirotherium rex Demathieu p. 160 |
1971 | Chirotherium moquinense Haubold p. 55 |
1971 | Chirotherium rex Haubold p. 55 |
1972 | Chirotherium moquinense Demathieu and Haubold p. 805 |
1972 | Chirotherium rex Demathieu and Haubold p. 805 |
1974 | Chirotherium moquinense Haubold p. 107 |
1974 | Chirotherium rex Haubold p. 107 |
1987 | Chirotherium moguinensis Conrad et al. p. 131 |
1987 | Chirotherium rex Conrad et al. p. 131 |
2010 | Chirotherium rex Klein and Lucas pp. 37, 46 |
2012 | Chirotherium rex Haderer and Sachs p. 7 |
2021 | Chirotherium rex Klein and Lucas p. 30 |
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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.
†Chirotherium rex Peabody 1948
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Invalid names: Chirotherium moquiensis Peabody 1948 [synonym]
Diagnosis
Reference | Diagnosis | |
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F. E. Peabody 1948 | Footprints 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. | |
H. Klein and S. G. Lucas 2021 | Footprints of large chirotheriids with a pes length of more than 33 cm. Digits I–IV with proportions III > II > IV > I, coalesced along 2/3 of their proximal length, forming a flat sole surface in which phalangeal and metatarsophalangeal pads are indistinct and have a straight posterior margin. Digit V as long as digit III and represented by a massive basal pad that runs into an elongate “heel” and lacks a distinct phalangeal portion. Claw impressions on pes digits I–IV rounded or spatulate-like; manus hooflike with wide and short, stubby digits tapering at their distal ends and indicating the presence of acuminate claws. |