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Chisternon undatum

Reptilia - Baenidae

Taxonomy
Baena undata was named by Leidy (1871). Its type specimen is ANSP 10040, a partial shell (plastron lacking the anterior portion of the anterior lobe), and it is a 3D body fossil. Its type locality is A few miles from Fort Bridger, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming. It is the type species of Chisternon.

It was recombined as Chisternon undatum by Leidy (1873), Hay (1908), Gilmore (1915), Hay (1930), Gaffney (1972), Gaffney (1972), Perea et al. (2014) and Joyce and Lyson (2015).

Synonyms
Synonymy list
YearName and author
1871Baena undata Leidy
1872Baena hebraica Cope p. 463
1873Baena hebraica Cope
1873Baena undata Cope
1873Chisternon undatum Leidy p. 169
1878Baena undata Osborn et al.
1882Baena hebraica Cope
1884Baena hebraica Cope
1884Baena undata Cope
1902Baena hebraica Hay p. 438
1902Baena undata Hay p. 438
1908Chisternon undatum Hay p. 85 figs. Plate 22; text-figs. 71-75
1908Chisternon hebraicum Hay p. 87 figs. Plate 21, figs. 3, 4; plate 23, fig. 1; text-figs. 76-87
1915Baena gigantea Gilmore p. 116
1915Chisternon undatum Gilmore p. 116
1930Baena gigantea Hay p. 72
1930Chisternon hebraicum Hay p. 73
1930Chisternon undatum Hay p. 73
1972Chisternon undatum Gaffney pp. 248, 286 figs. 34-36, 55, 56
2014Chisternon undatum Perea et al.
2015Chisternon undatum Joyce and Lyson

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
RankNameAuthor
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
—Testudinata(Oppel 1811)
—Paracryptodira
familyBaenidaeCope 1882
—BaenoddaGaffney and Meylan 1988
—Eubaeninae(Williams 1950)
genusChisternonLeidy 1872
speciesundatum()

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.

†Chisternon undatum Leidy 1871
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Invalid names: Baena gigantea Gilmore 1915 [synonym], Baena hebraica Cope 1872 [synonym]
Diagnosis
ReferenceDiagnosis
E. S. Gaffney 1972{same as for genus Chisternon]
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialuc
Locomotion: actively mobilec
Created: 2017-04-17 15:15:35
Modified: 2017-04-17 15:15:35
Source: c = class, subp = subphylum, uc = unranked clade
References: Hendy et al. 2009, Carroll 1988

Age range: base of the Middle Eocene to the top of the Uintan or 47.80000 to 39.70000 Ma

Collections (13 total)


Time interval Ma Country or state Original ID and collection number
Bridgerian50.3 - 46.2USA (Wyoming) Baena undata (16211 type locality: 128447 131861) Chisternon undatum (16226 106325) Chisternon undatum, Baena hebraica (130809) Chisternon undatum, Chisternon hebraicum (16228)
Middle Eocene47.8 - 37.71USA (Wyoming) Chisternon undatum, Baena undata (81455)
Early/Lower Uintan46.2 - 39.7USA (Utah) Chisternon undatum (186887)
Uintan46.2 - 39.7USA (Utah) Baena gigantea (16646) Chisternon undatum (186890 186894 186896)