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Birbalomys sondaari

Mammalia - Rodentia - Chapattimyidae

Taxonomy
Saykanomys sondaari was named by Hussain et al. (1978). It is not a trace fossil. Its type locality is H-GSP 144, which is in a Lutetian marine conglomerate in the Kuldana Formation of Pakistan.

It was recombined as Birbalomys sondaari by Hartenberger (1982), Kumar et al. (1997) and Thewissen et al. (2001).

Synonymy list
YearName and author
1978Saykanomys sondaari Hussain et al. p. 86&92 figs. Pl1, figs. 9-13; Pl2, figs, 8-12; Pl5, f
1982Birbalomys sondaari Hartenberger p. 25
1997Birbalomys sondaari Kumar et al.
2001Birbalomys sondaari Thewissen et al. p. 353

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
RankNameAuthor
classMammalia
—Theriamorpha(Rowe 1993)
—Theriiformes()
—Trechnotheria
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—EuarchontogliresMurphy et al. 2001
—GliriformesWyss and Meng 1996
—Glires()
—Simplicidentata()
orderRodentiaBowdich 1821
—CtenohystricaHuchon et al. 2000
superfamilyCtenodactyloidea
familyChapattimyidaeHussain et al. 1978
genusBirbalomys
speciessondaari(Hussain et al. 1978)

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.

†Birbalomys sondaari Hussain et al. 1978
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Diagnosis
ReferenceDiagnosis
J.L. Hartenberger 1982Smaller species than B. woodi; protoconule is less apparent than in B. woodi; mesoconid is included in the ectoloph.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingo
Diet: herbivoreo
Reproduction: viviparoussubc
Created: 2005-08-26 14:04:46
Modified: 2005-08-26 16:04:46
Source: o = order, subc = subclass, c = class, subp = subphylum
References: Lillegraven 1979, Carroll 1988, Ji et al. 2002, Nowak 1999, Hendy et al. 2009

Age range: base of the Early/Lower Eocene to the top of the Lutetian or 55.80000 to 41.30000 Ma

Collections (7 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Eocene55.8 - 48.6India (Himachal Pradesh) Birbalomys sondaari (180522)
Lutetian47.8 - 41.3India (Jammu and Kashmir) Birbalomys sondaari (31299)
Lutetian47.8 - 41.3Pakistan (North-West Frontier) Birbalomys sondaari, Saykanomys sp. (28978)
Lutetian47.8 - 41.3Pakistan (Punjab) Birbalomys sondaari (45586) Saykanomys sondaari (49002 type locality: 49003)
Middle Eocene47.8 - 37.71India (Himachal Pradesh) Birbalomys sondaari (31036)