Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy External Literature Search Age range and collections

Xenastrapotherium

Mammalia - Astrapotheria - Astrapotheriidae

Synonyms
Synonymy list
YearName and author
1928Xenastrapotherium Kraglievich
1976Synastrapotherium Paula Couto
1988Xenastrapotherium Carroll
1997Xenastrapotherium Johnson and Madden

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Synapsida()
RankNameAuthor
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
Epitheria
UngulataLinnaeus 1766
Meridiungulata
orderAstrapotheria
familyAstrapotheriidaeAmeghino 1887
subfamilyUruguaytheriinae
genusXenastrapotherium

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
S. E. Johnson and R. H. Madden 1997Xenastrapotherium differs from all other known astrapotheres by possessing two lower incisors on each side and an M3 posterolingual cingulum that joins the protoloph with the metaloph and closes the median valley lingually. In addition to these characters, Xenastrapotherium differs from all other known uruguaytheriine astrapotheres in possessing lower canine tusks with pronounced longitudinal curvature and anterorinferior and posteroinferior grooves in cross section; shallow lower molar metaflexids bounded by a variably developed anterolingual cingulum; and mesiodistally narow and rounded metalophids.
Measurements
partNmeanminimummaximummedians.d.
Lower canine diameter634.523.049.036.510.2
Lower m2 height128.0----
Mandible height271.863.681.072.312.3
Upper canine diameter632.623.050.032.09.84
lower m1 height124.0----
lower m3 height127.0----

Composition: phosphaticsubp
Body part: Dentalg
Maximum body mass: 1238.7 kgg
Minimum body mass: 1238.7 kgg
Body mass estimate: 1238.7 kg
Body mass source: publishedg
Environment: terrestrialg
Locomotion: actively mobilec
Life habit: cursorialg
Diet: herbivoreg
Comments: Body mass estimate: 1238.7 +/- 233.3 g
Created: 2013-05-18 03:16:16
Modified: 2013-05-17 12:16:16
Source: g = genus, c = class, subp = subphylum
References: Johnson and Madden 1997, Carroll 1988, Hendy et al. 2009, Ji et al. 2002

Age range: base of the Early/Lower Miocene to the top of the Middle Miocene or 23.03000 to 11.60800 Ma

Collections (20 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Miocene23.03 - 15.97Colombia (Tolima) X. chaparralensis (133440)
Miocene23.03 - 5.333Ecuador (Cañar) X. aequatorialis (144675)
Middle Miocene15.97 - 11.608Peru (Ucayali) X. sp. (144794)
Serravallian13.82 - 11.62Bolivia (Tarija) Astrapotherium indet. (38071)
Laventan13.8 - 11.8Colombia (Tolima) Xenastrapotherium indet. (132559)
Laventan13.8 - 11.8Colombia (Huila) X. kraglievichi (133693 136211 141256 143787 143789 187114 187115 187718 187965 188024 188025 188026 188027)
Laventan13.8 - 11.8Peru (Ucayali) X. sp. (107993)
Tortonian11.62 - 7.246Brazil (Acre) Synastrapotherium sp., X. amazonense (55602)