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Brachychirotherium circaparvum

Reptilia - Chirotheriidae

Taxonomy
Brachychirotherium circaparvum was named by Demathieu (1971). It is considered to be a form taxon. Its type specimen is 21.1 BK2, a footprint, and it is a trace fossil. Its type locality is Chasselay tracksite, level C (BQ), which is in an Anisian/Ladinian terrestrial horizon in the Grès Inférieurs du Lyonnais Formation of France.

Synonymy list
YearName and author
1971Brachychirotherium circaparvum Demathieu p. 813
1971Brachychirotherium circaparvum Haubold p. 56
1972Brachychirotherium circaparvum Demathieu and Haubold p. 805
1974Brachychirotherium circaparvum Haubold p. 117
1975Brachychirotherium circaparvum Gand p. 8
1976Brachychirotherium circaparvum Courel and Demathieu p. 206
1978Brachychirotherium circaparvum Gand p. 16
1985Brachychirotherium circaparvum Demathieu p. 59
1995Brachychirotherium circaparvum Courel and Demathieu p. 87
2004Brachychirotherium circaparvum Demathieu and Demathieu p. 83
2007Brachychirotherium circaparvum Gand et al. p. 12
2012Brachychirotherium circaparvum Gand et al. p. 68

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Eugnathostomata
—Teleostomi(Bonaparte 1836)
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
RankNameAuthor
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
—Pseudosuchia(Zittel 1890)
familyChirotheriidaeAbel 1935
genusBrachychirotherium
speciescircaparvum

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.

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Diagnosis
ReferenceDiagnosis
G. Demathieu 1971Diagnose. — Empreintepentadactyle (84 x 153 mm). La masse des quatre pre- miers orteils, sub-pafallèles sauf le 4e, donne un ensemble compact s'inscrivant à peu près dans un carré. Les griffes des 1er et 2e orteils sont déjetées vers l'intérieur. Celle du 4e paraît absente. Le 5e orteil n'est pas présent. Le coussinet digito-méta-
tarsien V est bien visible et fait avec le 1er rayon un angle de 50° ; sa forme paraît varier en fonction de la taille: allongée sur les grosses empreintes, plus courte relativement et plus épaisse sur les petites. La main est relativement grande par rapport au pied : 1/3,5 pour le type ; le 2e doigt y est le plus long.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilep
Diet: carnivoresubo
Created: 2009-01-03 20:38:45
Modified: 2009-01-03 22:38:45
Source: subo = suborder, subc = subclass, subp = subphylum, p = phylum
References: Kiessling 2004, Benton 1983, Carroll 1988

Age range: Anisian or 246.70000 to 241.46400 Ma

Collections (6 total)


Time interval Ma Country or state Original ID and collection number
Anisian246.7 - 241.464France (Languedoc-Rousillon) Brachychirotherium circaparvum (199936)
Anisian - Ladinian246.7 - 237.0France (Bourgogne-Franche-Comté) Brachychirotherium circaparvum (28462 62182 62183)
Anisian - Ladinian246.7 - 237.0France (Auvergne-Rhône-Alpes) Brachychirotherium circaparvum (type locality: 31310 192151)