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Stenomylus tubutamensis

Mammalia - Artiodactyla - Camelidae

Taxonomy
Stenomylus tubutamensis was named by Ferrusquia-Villafranca (1990). Its type specimen is IGM 4002, a mandible (right mandibular fragment with the posterior part of m1 and m2-3), and it is a 3D body fossil. Its type locality is Tubutama, which is in a Miocene terrestrial horizon in Mexico.

It was recombined as Stenomylus (Stenomylus) tubutamensis by Cassiliano (2008).

Synonymy list
YearName and author
1990Stenomylus tubutamensis Ferrusquia-Villafranca p. 33
1998Stenomylus tubutamensis Honey et al. p. 444
2008Stenomylus (Stenomylus) tubutamensis Cassiliano p. 144
2010Stenomylus tubutamensis Cassiliano p. 56

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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
Synapsida()
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
orderArtiodactyla()
suborderTylopoda()
superfamilyCameloidea
familyCamelidae
subfamilyStenomylinae
tribeStenomylini
genusStenomylus
speciestubutamensis

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
I. Ferrusquia-Villafranca 1990
It differs from the other Stenomylus species, by being the smallest one, having the upper and lower first premolars isolated from the canines by a short diastema and from the second premolar by a much longer one; upper fourth premolar and first molar with almost not dis- cernible, slit-like fossettes and very faint styles; imbricated lower incisors and canine; the lo- wer molars have strong parastylids, and the entostylids projected posteriorly on the anterior border of the contiguous molar; the third lower molar has a very short (if any) accessory lobe; the ventral border of the horizontal rami is straight, with no trace of the prominence located close to the mental foramen seen in most of the other species.
M. Cassiliano 2010Compared to the other species of Stenomylus, Stenomylus tubutamensis is diagnosed by the follow- ing characters: smallest upper canine, smallest P1, shortest average C–P1 diastema, shortest average p1– p2 diastema, shortest average p2–p3 diastema, and narrow, slit-like lower molar fossettids.