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

Megalonychidae

Mammalia - Megalonychidae

Synonyms
Synonymy list
YearName and author
1821Bradypidae Gray p. 304
1825Bradypidae Gray p. 343
1850Bradypodidae Bonaparte p. 1
1855Megalonychidae Gervais
1883Bradypodidae Flower p. 184
1889Bradypodidae Cope p. 658
1891Megalonychidae Ameghino p. 32
1891Bradypodidae Flower and Lydekker p. 89
1894Megalonychidae Ameghino p. 147
1897Megalonychidae Ameghino p. 505
1898Bradypodidae Gadow p. 41
1911Bradypodidae Jaekel p. 225
1980Megalonychidae Kurten and Anderson p. 135
1981Megalonychidae Thurmond and Jones p. 177
1988Megalonychidae Carroll
1991Bradypodidae Nowak
1991Megalonychidae Nowak
1995Megalonychidae Gaudin
1995Megalonychidae Muizon and McDonald p. 224
2002Megalonychidae McDonald and Muizon p. 350
2007Megalonychidae McDonald and Naples p. 154
2013Megalonychidae McDonald et al. p. 1228
2017Megalonychidae McDonald and Carranza-Castañeda

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
RankNameAuthor
Synapsida()
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
Americatheria
Xenarthra()
infraorderPilosaFlower 1883
familyMegalonychidaeGervais 1855
familyMegalonychidaeGervais 1855

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
No diagnoses are available
Measurements
partNmeanmedian
DIstal Fibula height128.5-
Humerus height280.080.0
Humerus diameter2170.0170.0

Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: herbivoref
Comments: life habit and diet based on Nowak 1999f
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, Carroll 1988, Hendy et al. 2009, Ji et al. 2002

Age range

Maximum range based only on fossils: base of the Bartonian to the top of the Holocene or 41.30000 to 0.00000 Ma
Minimum age of oldest fossil (stem group age): 38.0 Ma

Collections (258 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Bartonian41.3 - 38.0Antarctica Megalonychidae indet. (31173)
Deseadan29.0 - 21.0Bolivia (La Paz) Megalonychidae indet. (133611)
Deseadan29.0 - 21.0Bolivia Megalonychidae indet. (95688)
Deseadan29.0 - 21.0Argentina (Mendoza) Megalonychidae indet. (176466)
Early/Lower Miocene23.03 - 15.97Argentina (Santa Cruz) Hyperleptus sp. (142533)
Early/Lower Miocene23.03 - 15.97Cuba (Sancti Spiritus) Imagocnus zazae (31183)
Miocene23.03 - 5.333USA (California) Megalonychidae indet. (19376)
Colhuehuapian21.0 - 17.5Argentina (Chubut) Megalonychidae indet. (141368)
Burdigalian20.44 - 15.97Chile (Magallanes) Megalonychidae indet. (204203)
Burdigalian - Langhian20.44 - 13.82Colombia (Guajira) Hyperleptus sp. (145271)
Santacrucian17.5 - 16.3Argentina (Santa Cruz) Hyperleptus sp. (176602 176636) Megalonychidae indet. (87314 176590) Megalonychotherium atavus (206237)
Friasian16.3 - 15.5Colombia Megalonychidae indet. (13650)
Laventan13.8 - 11.8Colombia (Tolima) Megalonychidae indet. (132559 132580 140179 140183)
Laventan13.8 - 11.8Peru (Ucayali) Megalonychidae indet. (144793)
Laventan13.8 - 11.8Colombia (Huila) Megalonychidae indet. (133441 186607 186621 186630 186683 186860 187945 187967 187972) Megalonychinae indet. (133689 187078 187721 187739)
Clarendonian13.6 - 10.3USA (Nebraska) Megalonychidae indet. (18299)
Clarendonian - Hemphillian13.6 - 4.9USA (Nebraska) Megalonychidae indet. (18305)
Tortonian11.62 - 7.246Brazil (Acre) Megalonychidae indet., Pliomorphus sp., Protomegalonyx sp. (55602)
Late/Upper Miocene11.608 - 5.333Venezuela (Falcon) Urumacocnus urbanii (198252)
Late/Upper Miocene11.608 - 5.333Venezuela (Falcón) Pattersonocnus diazgameroi (198253)