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Granastrapotherium snorki

Mammalia - Astrapotheria - Astrapotheriidae

Taxonomy
Granastrapotherium snorki was named by Johnson and Madden (1997) [Holotype: UCMP 40358, a partial skull including the palate and basicranium preserving the complete upper dentition, including right and left canine, P4, and M1-3. Preserved also are the internal nares, inferior margin of the right orbit and an incomplete occipital condyle. The top of the face, neurocranium, and occipital region are missing]. Its type specimen is UCMP 40358, a partial skull (Partial skull including the palate and basicranium preserving the complete upper dentition), and it is a 3D body fossil. It is the type species of Granastrapotherium.

Synonymy list
YearName and author
1997Granastrapotherium snorki Johnson and Madden

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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
Synapsida()
RankNameAuthor
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
Epitheria
UngulataLinnaeus 1766
Meridiungulata
orderAstrapotheria
familyAstrapotheriidaeAmeghino 1887
genusGranastrapotherium
speciessnorki

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 1997As for type genus: Granastrapotherium may be distinguished from all other astrapotheres by lacking lower incisors, by possesing large, ever-growing, sexually dimorphic, horizontally implanted lower canine tusks that are round to oval in cross section; by having proportionally longer lower m2 and m3 crowns compared with m1; in lacking upper P3; and by having an upper P4 without parastyle. Granastrapotherium may be further distinguish from Uruguaytherium by possesing traces of the hypoflexid groove on the buccal aspect of the lower molars and by having a more distally oriented and bassally rounded lower molar metalophid. Granastraphotherium differs from Xenastrapotherium in having only very weakly developed upper molar lingual cingula and in lacking any connection between the protoloph and the ectoloph in the upper M3
Measurements
partNmeanminimummaximummedians.d.
Humerus diameter2144.7135.0155.0145.014.1
Lower canine diameter435.826.546.537.510.7
Mandible height3111.397.0119.6119.012.9
Upper canine diameter445.737.556.046.210.0
posterior part of the ectoloph of an M3 height173.0----

Composition: phosphaticsubp
Body part: Dental, Cranial, Mandibles
Maximum body mass: 1374.7 kgs
Minimum body mass: 1374.7 kgs
Body mass estimate: 1374.7 kg
Body mass source: publisheds
Environment: terrestrials
Locomotion: actively mobilec
Life habit: cursorials
Diet: herbivores
Comments: Body mass estimate: 1374.7 +/-243.0s
Created: 2013-05-18 03:12:57
Modified: 2013-05-17 12:14:22
Source: s = species, c = class, subp = subphylum
References: Johnson and Madden 1997, Carroll 1988, Hendy et al. 2009

Age range: base of the Friasian to the top of the Laventan or 16.30000 to 11.80000 Ma

Collections (26 total)


Time interval Ma Country or state Original ID and collection number
Friasian16.3 - 15.5Colombia Granastrapotherium snorki (13757)
Laventan13.8 - 11.8Colombia (Tolima) Granastrapotherium snorki (143779 143781 143782 143783)
Laventan13.8 - 11.8Peru (Ucayali) Granastrapotherium snorki (144792 144793)
Laventan13.8 - 11.8Colombia (Huila) Granastrapotherium snorki (133692 134806 135348 140051 143785 143795 145175 145617 186607 187114 187115 187718 187719 187720 187721 187888 187970 188025 188028)