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Zacatzontli

Mammalia - Megalonychidae

Synonymy list
YearName and author
2017Zacatzontli McDonald and Carranza-Castañeda

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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()
RankNameAuthor
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Theriamorpha(Rowe 1993)
—Theriiformes()
—Trechnotheria
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Americatheria
—Xenarthra()
infraorderPilosaFlower 1883
—Folivora
classEufolivoraDelsuc et al. 2001
superfamilyMegatherioideaGray 1821
familyMegalonychidaeGervais 1855
genusZacatzontli

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.

G. †Zacatzontli McDonald and Carranza-Castañeda 2017
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†Zacatzontli cotobrusensis Valerio et al. 2022
†Zacatzontli tecolotlanensis McDonald and Carranza-Castañeda 2017
Diagnosis
ReferenceDiagnosis
H. G. McDonald and O. Carranza-Castañeda 2017Small ground sloth similar in size to the smaller Late Pleistocene megalonychids Acratocnus and Neocnus, from the Caribbean and Eucholoeops and Proschismotherium from the late Miocene of Argentina; lower caniniform triangular in cross section with prominent carina on distal margin of the tooth; predental spout triangular in dorsal view quickly narrowing anteriorly; keel on mandibular symphysis restricted to dorsal half, with small fossa between keel and caniniform in which is located the mental foramen; horizontal ramus below molariforms uniform in anterodorsal width and lacks prominently convex ventral margin; prominent lateral bulge of horizontal ramus opposite first and second molariforms, prominent groove at base of condylar process and anterodorsal margin of angular process.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: herbivoref
Reproduction: viviparoussubc
Created: 2005-06-08 10:11:09
Modified: 2005-08-22 18:30:05
Source: f = family, subc = subclass, c = class, subp = subphylum
References: Nowak 1991, Hendy et al. 2009, Ji et al. 2002, Lillegraven 1979, Carroll 1988

Age range: Hemphillian or 10.30000 to 4.90000 Ma

Collections (3 total)


Time interval Ma Country or state Original ID and collection number
Hemphillian10.3 - 4.9Mexico (Jalisco) Z. tecolotlanensis (189788 189790)
Hemphillian10.3 - 4.9Costa Rica (Puntarenas) Z. cotobrusensis (144596)