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Megatherioidea

Mammalia

Synonymy list
YearName and author
1821Megatherioidea Gray
1930Megatherioidae Hay p. 403
1956Megatherioidea Paula Couto p. 99
2001Megatherioidea White and MacPhee
2006Megatherioidea Pujos
2007Megatherioidea Pujos et al.
2019Megatherioidea Varela et al.

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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
superfamilyMegatherioideaGray 1821

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.

Superfm. †Megatherioidea Gray 1821
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G. †Hiskatherium Pujos et al. 2011
+
†Hiskatherium saintandrei Pujos et al. 2011
Fm. †Megalonychidae Gervais 1855
+
G. †Amphihapalops Ameghino 1891
+
†Amphihapalops cadens Ameghino 1891
†Amphihapalops congermanus Ameghino 1891
†Amphihapalops gallaicus Ameghino 1891
G. †Amphiocnus Kraglievich 1922
+
†Amphiocnus paranense Kraglievich 1922
G. †Analcimorphus Ameghino 1891
+
†Analcimorphus giganteus Ameghino 1894
†Analcimorphus inversus Ameghino 1891
Subfm. †Choloepodinae MacPhee 2001
+
G. †Acratocnus Anthony 1916
+
†Acratocnus antillensis Matthew 1931
†Acratocnus odontrigonus Anthony 1916
†Acratocnus ye MacPhee et al. 2001
G. Choloepus Illiger 1811
+
Choloepus andinus Allen 1913
Choloepus didactylus Linnaeus 1758 [Linnaeus's two toed sloth]
+
Invalid names: Choloepus braziliensis Fitzinger 1871 [synonym], Choloepus curi Link 1795 [synonym], Choloepus florenciae Allen 1913 [synonym], Choloepus guianensis Fitzinger 1871 [synonym], Choloepus napensis Lönnberg 1922 [synonym], Choloepus unau Link 1795 [synonym]
Choloepus hoffmanni Peters 1858 [Hoffmann's two-toed sloth]
Invalid names: Choloepus didactylus columbianus Gray 1871 [synonym]
G. †Neocnus Arredondo 1961
+
†Neocnus comes Miller 1929
†Neocnus dousman MacPhee et al. 2001
†Neocnus gliriformis Matthew 1931
†Neocnus major Arredondo 1961
†Neocnus toupiti MacPhee et al. 2001
G. †Paulocnus Hooijer 1962
+
†Paulocnus petrifactus Hooijer 1962
Invalid names: Acratocnini Varona 1974 [empty], Choloepodini Gray 1871 [empty], Cubanocnini Varona 1974 [empty]
G. †Deseadognathus Carlini and Scillato-Yané 2004
+
†Deseadognathus riggsi Carlini and Scillato-Yané 2004
G. †Diheterocnus Kraglievich 1928
G. †Eleutherodon Mercerat 1891
+
†Eleutherodon heteroclitus Mercerat 1891
G. †Eucholoeops Amegino 1887
+
†Eucholaeops titan Lydekker 1894
†Eucholoeops fronto Ameghino 1891
+
Invalid names: Eucholoeops latifrons Mercerat 1891 [synonym]
†Eucholoeops ingens Ameghino 1887
+
Invalid names: Eucholoeops curtus Ameghino 1894 [synonym], Eucholoeops externus Ameghino 1891 [synonym], Eucholoeops latirostris Ameghino 1891 [synonym]
†Eucholoeops litoralis Ameghino 1891
†Eucholoeops titans Lyddekker 1894
G. †Eugeronops Ameghino 1891
G. †Geronops Ameghino 1891
+
†Geronops circularis Ameghino 1891
G. †Hapalops Ameghino 1887
+
†Hapalops adteger Amegino 1887
†Hapalops aguirrei Mercerat 1891
†Hapalops angustipalatus Ameghino 1891
†Hapalops antistis Ameghino 1897
†Hapalops atlanticus Ameghino 1891
†Hapalops australis Mercerat 1891
†Hapalops boulei Mercerat 1891
†Hapalops brachycephalus Ameghino 1894
†Hapalops brevipalatus Ameghino 1891
+
Invalid names: Stenocephalus hybridus Mercerat 1891 [synonym]
†Hapalops cilindricus Ameghino 1891
†Hapalops cognathus Mercerat 1891
†Hapalops congermanus Ameghino 1891
†Hapalops crassidens Ameghino 1891
†Hapalops crassignathus Ameghino 1891
†Hapalops crassissimus Ameghino 1894
†Hapalops crassissimus Ameghino 1894
†Hapalops curvus Ameghino 1899
†Hapalops depressipalatus Ameghino 1891
†Hapalops diverssidens Ameghino 1891
†Hapalops elongatus Ameghino 1891
†Hapalops forticulus Ameghino 1891
†Hapalops gracilidens Ameghino 1891
†Hapalops grandaevus Moreno and Mercerat 1891
†Hapalops grandis Ameghino 1894
†Hapalops hyperleptus Ameghino 1891
†Hapalops indifferens Ameghino 1887
+
Invalid names: Stenocephalus australis Mercerat 1891 [synonym]
†Hapalops infernalis Ameghino 1887
†Hapalops latus Ameghino 1894
†Hapalops longiceps Scott 1903
†Hapalops longipalatus Ameghino 1891
†Hapalops minutus Ameghino 1891
†Hapalops platycephalus Scott 1903
†Hapalops ponderosus Scott 1903
†Hapalops primus Ameghino 1894
†Hapalops rectagulidens Ameghino 1891
†Hapalops robustus Ameghino 1891
†Hapalops rostratus Ameghino 1887
+
Invalid names: Xyophorus simus Ameghino 1887 [synonym]
†Hapalops rutimeyeri Ameghino 1891
†Hapalops sectus Ameghino 1891
†Hapalops subcuadratus Ameghino 1891
†Hapalops testudinatus Ameghino 1891
†Hapalops vulpiceps Scott 1903
Invalid names: Stenocephalus Mercerat 1891 [synonym]
G. †Holomegalonyx Scillato-Yané 1979
G. †Hyperleptus Ameghino 1891
+
†Hyperleptus garzonianus Ameghino 1891
†Hyperleptus schissognathus Ameghino 1891
†Hyperleptus sectus Ameghino 1891
+
Invalid names: Tapinotherium aguirrei Mercerat 1891 [synonym]
Invalid names: Tapinotherium Mercerat 1891 [synonym]
G. †Mecorhinus Ameghino 1894
+
†Mecorhinus primus Ameghino 1894
Subfm. †Megalocninae
+
G. †Imagocnus MacPhee and Iturralde-Vinent 1994
+
†Imagocnus zazae MacPhee and Iturralde-Vincent 1994
G. †Megalocnus Leidy 1868
+
†Megalocnus rodens Matthew and Paula Couto 1959
†Megalocnus zile MacPhee et al. 2000
G. †Parocnus Miller 1929
+
†Parocnus browni Matthew 1931
†Parocnus serus Miller 1929
Invalid names: Megalocnini Kraglievich 1923 [empty], Mesocnini Varona 1974 [empty]
Subfm. †Megalonychinae Trouessart 1904
+
G. †Ahytherium Cartelle et al. 2008
+
†Ahytherium aureum Cartelle et al. 2008
Invalid names: Iporangabradyx Dos Santos 1991 [nomen nudum], Iporangabradyx collecti Dos Santos 1991 [nomen nudum]
G. †Australonyx De Iuliis et al. 2009
+
†Australonyx aquae De Iuliis et al. 2009
G. †Ereptodon Leidy 1853
+
†Ereptodon priscus Leidy 1853
G. †Megalonyx Harlan 1825
+
†Megalonyx curvidens Matthew 1924
†Megalonyx cuvieri Lund 1839
†Megalonyx dissimilis Leidy 1855
†Megalonyx gigas Marsh 1874
†Megalonyx jeffersonii Desmarest 1822 [Jefferson's ground sloth]
+
Invalid names: Megalonyx brachycephalus Sellards 1941 [synonym], Megalonyx californicus Stock 1913 [synonym], Megalonyx hogani Stovall 1940 [synonym], Megalonyx laqueatus Harlan 1831 [synonym], Megalonyx milleri Lyon 1938 [synonym]
†Megalonyx leidyi Lindahl 1892
†Megalonyx leptostomus Cope 1893
+
Invalid names: Megalonyx rohrmani Gustafson 1978 [synonym]
†Megalonyx loxodon Cope 1871
†Megalonyx mathisi Hirschfeld and Webb 1968
†Megalonyx obtusidens Webb and Perrigo 1985
†Megalonyx scalper Cope 1899
†Megalonyx sierrensis Sinclair 1905 [sloth]
†Megalonyx tortulus Cope 1871
†Megalonyx validus Leidy 1868
†Megalonyx wheatleyi Cope 1871
+
Invalid names: Megalonyx sphenodon Cope 1871 [synonym]
Invalid names: Megalonyx gracilis Lund 1893 [nomen nudum]
G. †Megistonyx McDonald et al. 2013
+
†Megistonyx oreobios McDonald et al. 2013
G. †Pliometanastes Hirschfeld and Webb 1968
+
†Pliometanastes protistus Hirschfeld and Webb 1968
+
Invalid names: Pliometanastes galushai Hirschfeld and Webb 1968 [synonym]
G. †Sinclairia Ameghino 1912
+
†Sinclairia oregoniana Ameghino 1912
G. †Megalonychops Kraglievich 1927
+
†Megalonychops primigenius Kraglievich 1926
G. †Megalonychotherium Scott 1904
+
G. †Meizonyx Webb and Perrigo 1985
+
†Meizonyx salvadorensis Webb and Perrigo 1985
G. †Mesocnus Matthew 1931
+
†Mesocnus torrei Matthew 1931
G. †Mesopotamocnus Brandoni 2014
+
Subfm. †Metopotherinae Ameghino 1902
+
G. †Hapaloides Ameghino 1902
+
†Hapaloides ignavus Ameghino 1902
†Hapaloides laeviusculus Ameghino 1902
†Hapaloides ponderosus Ameghino 1902
G. †Proschismotherium Ameghino 1902
+
†Proschismotherium oppositum Ameghino 1902
Subfm. †Metopotherini Ameghino 1894
+
G. †Adiastemus Ameghino 1894
+
†Adiastemus compressidens Ameghino 1894
G. †Metopotherium Ameghino 1891
+
†Metopotherium splendens Ameghino 1891
G. †Uranokyrtus Ameghino 1894
+
†Uranokyrtus bombifrons Ameghino 1894
G. †Microcnus Matthew 1931
G. †Miocnus Matthew 1931
G. †Nohochichak McDonald et al. 2017
+
†Nohochichak xibalbahkah McDonald et al. 2017
G. †Nothropus Burmeister 1882
+
†Nothropus carcaranensis Bordas 1942
†Nothropus nordenskioldi Pujos et al. 2007
†Nothropus priscus Burmeister 1882
Subfm. †Ocnopodinae Hoffstetter 1954
+
G. †Ocnopus Reinhardt 1875
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†Ocnopus gracilis Lund 1840
Subfm. †Ortotheriinae Ameghino 1889
+
G. †Menilaus Ameghino 1891
G. †Ortotherium Ameghino 1885
+
†Ortotherium berroi Kraglievich 1932
†Ortotherium laticurvatum Ameghino 1885
+
Invalid names: Amphiocnus seneum Ameghino 1891 [synonym], Amphiocnus seneus Ameghino 1891 [synonym], Menilaus affinis Ameghino 1891 [synonym], Ortotherium schlosseri Ameghino 1891 [synonym], Ortotherium scrofum Bordas 1941 [synonym]
†Ortotherium robustum Ameghino 1881
G. †Paranabradys Scillato-Yané 1980
+
†Paranabradys vucetichae Scillato-Yané 1980
G. †Paraplanops Ameghino 1891
+
†Paraplanops oblongus Ameghino 1891
G. †Pattersonocnus Rincón et al. 2019
+
†Pattersonocnus diazgameroi Rincón et al. 2019
G. †Pliomorphus Ameghino 1885
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†Pliomorphus mutilatus Ameghino 1885
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Invalid names: Pliomorphus ameghinoi Kraglievich 1923 [synonym], Pliomorphus brevis Kraglievich 1923 [synonym]
†Pliomorphus robustus Ameghino 1885
G. †Protomegalonyx Kraglievich 1925
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†Protomegalonyx chasicoensis Scillato-Yané 1977
†Protomegalonyx doellojuradoi Kraglievich 1925
†Protomegalonyx praecursor Kraglievich 1925
G. †Pseudhapalops Ameghino 1891
+
†Pseudhapalops altiramis Ameghino 1894
†Pseudhapalops forticulus Ameghino 1891
†Pseudhapalops grandis Ameghino 1894
†Pseudhapalops infernalis Ameghino 1887
†Pseudhapalops observationis Ameghino 1891
G. †Pseudortotherium Scillato-Yane 1981
G. †Torcellia Kraglievich 1923
+
†Torcellia paranense Kraglievich 1923
G. †Trematherium Ameghino 1887
+
†Trematherium nanum Ameghino 1891
G. †Urumacocnus Rincón et al. 2019
+
†Urumacocnus urbanii Rincón et al. 2019
G. †Xibalbaonyx Stinnesbeck et al. 2017
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†Xibalbaonyx exinferis Stinnesbeck et al. 2020
†Xibalbaonyx microcaninus Stinnesbeck et al. 2018
†Xibalbaonyx oviceps Stinnesbeck et al. 2017
G. †Zacatzontli McDonald and Carranza-Castañeda 2017
+
†Zacatzontli cotobrusensis Valerio et al. 2022
†Zacatzontli tecolotlanensis McDonald and Carranza-Castañeda 2017
Invalid names: Choloepidae Gray 1871 [synonym]
Unr. †Megatheria
+
Fm. †Megatheriidae Gray 1821
+
G. †Diellipsodon Berg 1899
G. †Eomegatherium Kraglievich 1926
+
†Eomegatherium andinum Kraglievich 1930
†Eomegatherium cabrerai Kraglievich 1930
†Eomegatherium nanum Burmeister 1891
Subfm. †Megatheriinae Gill 1872
+
G. †Anisodontherium Brandoni and De Iuliis 2007
+
G. †Diabolotherium Pujos et al. 2007
+
†Diabolotherium nordenskioldi Pujos et al. 2007
G. †Eremotherium Spillmann 1948
+
†Eremotherium eomigrans De Iuliis and Cartelle 1999
+
Invalid names: Chelonia couperi Harlan 1842 [synonym], Eremotherium carolinense Spillmann 1948 [synonym], Eremotherium juanajuatense Duges 1882 [synonym], Megatherium hudsoni White 1941 [synonym], Xenocnus cearensis Paula Couto 1980 [synonym]
†Eremotherium rusconii Schaub 1935
†Eremotherium sefvei De Iuliis and Saint-Andre 1997
Invalid names: Schaubia Hoffstetter 1949 [synonym], Schaubitherium Hoffstetter 1950 [synonym], Xenocnus Paula Couto 1980 [synonym]
G. †Megathericulus Ameghino 1904
+
†Megathericulus patagonicus Ameghino 1904
+
Invalid names: Megathericulus primaevus Cabrera 1939 [synonym]
G. †Megatheridium Cabrera 1928
+
†Megatheridium annectens Cabrera 1928
G. †Megatheriops Ameghino and Kraglievich 1921
+
†Megatheriops rectidens Rovereto 1914
G. †Megatherium Cuvier 1796
+
†Megatherium altiplanicum Saint-Andre and De Iuliis 2001
†Megatherium americanum Cuvier 1796
+
Invalid names: Essonodontherium gervaisi Gervais and Ameghino 1880 [synonym]
†Megatherium bergi Moreno and Mercerat 1891
†Megatherium elenense Hoffstetter 1949
†Megatherium gallardoi Ameghino and Kraglievich 1921
†Megatherium gaudryi Moreno 1888
†Megatherium istilarti Kraglievich 1925
†Megatherium lundi Gervais and Ameghino 1880
†Megatherium medinae Philippi 1893
†Megatherium mirabile Leidy 1855
†Megatherium rectidens Rovereto 1914
†Megatherium sundti Philippi 1893
†Megatherium tarijense Gervais and Ameghino 1880
+
Invalid names: Megatherium filholi Moreno 1888 [synonym]
†Megatherium uquiense Kraglievich 1930
†Megatherium urbinai Pujos and Salas 2004
Invalid names: Essonodontherium Ameghino 1884 [synonym], Megatherium antiquum Ameghino 1885 [nomen dubium], Neoracanthus Ameghino 1889 [synonym], Oracanthus Ameghino 1885 [synonym]
G. †Plesiomegatherium Roth 1911
+
Invalid names: Plesiomegatherium triangulatum Rusconi 1944 [nomen vanum]
G. †Pliomegatherium Kraglievich 1930
+
†Pliomegatherium lelongi Kraglievich 1930
+
Invalid names: Pliomegatherium paranensis Kraglievich 1930 [synonym]
G. †Proeremotherium Carlini et al. 2006
+
†Proeremotherium eljebe Carlini et al. 2006
G. †Pyramiodontherium Rovereto 1914
+
†Pyramiodontherium bergi Moreno and Mercerat 1891
+
Invalid names: Plesiomegatherium burmeisteri Moreno and Mercerat 1891 [synonym], Pyramiodontherium dubium Rovereto 1914 [synonym]
†Pyramiodontherium brevirostrum Carlini et al. 2002
†Pyramiodontherium carlesi Kraglievich 1930
†Pyramiodontherium remulsum Ameghino 1886
†Pyramiodontherium scillatoyanei De Iuliis et al. 2004
G. †Sibotherium Rincón et al. 2020
+
†Sibotherium ka Rincón et al. 2020
G. †Urumaquia Carlini et al. 2006
+
†Urumaquia robusta Carlini et al. 2006
Invalid names: Xenocninae Paula Couto 1980 [synonym]
Unr. †Mylomorpha Ameghino 1885
+
G. †Interodon Ameghino 1885
+
†Interodon crassidens Ameghino 1885
G. †Promegatherium Ameghino 1883
+
†Promegatherium andinum Kraglievich 1930
†Promegatherium cabrerai Kraglievich 1930
†Promegatherium parvulum Ameghino 1891
†Promegatherium smaltatum Ameghino 1883
†Promegatherium smaltatus Ameghino 1883
Subfm. †Planopinae Ameghino 1887
+
G. †Planops Ameghino 1887
+
†Planops grandis Scillato-Yané and Carlini 1998
†Planops longirostratus Ameghino 1887
†Planops magnus Scott 1904
†Planops martini Hoffstetter 1961
†Planops obesus Ameghino 1891
G. †Prepoplanops Carlini et al. 2013
+
†Prepoplanops boleadorensis Carlini et al. 2013
G. †Prepotherium Ameghino 1891
+
†Prepotherium filholi Ameghino 1891
†Prepotherium moyani Ameghino 1894
†Prepotherium potens Ameghino 1891
Subfm. †Prepotherinae Ameghino 1894
+
G. †Prepotheriops Ameghino 1904
+
†Prepotheriops megatheroides Ameghino 1904
G. †Proprepotherium Ameghino 1904
+
†Proprepotherium deseadense Ameghino 1904
Unr. †Rodimorpha Ameghino 1885
+
G. †Diodomus Ameghino 1885
+
†Diodomus copei Ameghino 1885
G. †Zamicrus Ameghino 1889
+
†Zamicrus admirabilis Ameghino 1889
Invalid names: Megatheriina Bonaparte 1850 [empty]
Fm. †Nothrotheriidae Ameghino 1920
+
G. †Mcdonaldocnus Gaudin et al. 2022
+
†Mcdonaldocnus bondesioi Scillato-Yané 1979
†Mcdonaldocnus villarroeli Gaudin et al. 2022
+
Invalid names: Xyophorus villarroeli St-Andre 1996 [objective synonym]
G. †Neohapalops Kraglievich 1923
+
†Neohapalops rothi Kraglievich 1923
Subfm. †Nothrotheriinae Ameghino 1920
+
G. †Amphibradys Scillato-Yané and Carlini 1998
+
†Amphibradys guiomari Scillato-Yané and Carlini 1998
G. †Aymaratherium Pujos et al. 2016
+
†Aymaratherium jeani Pujos et al. 2016
G. †Chasicobradys Scillato-Yané et al. 1987
+
†Chasicobradys intermedius Scillato-Yané et al. 1987
G. †Huilabradys Villarroel 1998
+
†Huilabradys magdaleniensis Villarroel 1998
G. †Lakukullus Pujos et al. 2014
+
†Lakukullus anatisrostratus Pujos et al. 2014
G. †Mionothropus De Iuliis et al. 2011
+
†Mionothropus cartellei De Iuliis et al. 2011
G. †Nothrotheriops Hoffstetter 1954
G. †Nothrotherium Lydekker 1889
+
+
Invalid names: Coelodon escrivanensis Reinhardt 1878 [synonym]
†Nothrotherium mexicanum Freudenberg 1921
†Nothrotherium shastense Sinclair 1905 [Shasta ground sloth]
+
Invalid names: Nothrotherium graciliceps Stock 1913 [synonym]
Invalid names: Coelodon Lund [replaced]
G. †Pronothrotherium Ameghino 1907
+
†Pronothrotherium mirabilis Kraglievich 1925
+
Invalid names: Pronothrotherium figueirasi Perea 1988 [synonym]
†Pronothrotherium subtypicum Rovereto 1914
†Pronothrotherium typicum Ameghino 1907
G. †Xyophorus Ameghino 1887
+
†Xyophorus andinus Ameghino 1891
†Xyophorus atlanticus Ameghino 1891
†Xyophorus crassissimus Ameghino 1894
†Xyophorus rostratus Ameghino 1887
+
Invalid names: Eurysodon nasutus Mercerat 1891 [synonym]
†Xyophorus sulcatus Ameghino 1891
+
Invalid names: Eurysodon boulei Mercerat 1891 [synonym]
Subfm. †Thalassocninae Muizon et al. 2004
+
G. †Thalassocnus Muizon and McDonald 1995
+
†Thalassocnus antiquus Muizon et al. 2003
†Thalassocnus carolomartini McDonald and Muizon 2002
†Thalassocnus littoralis McDonald and Muizon 2002
†Thalassocnus natans Muizon and McDonald 1995
†Thalassocnus yaucensis Muizon et al. 2004
G. †Pelecyodon Ameghino 1891
+
†Pelecyodon arcuatus Ameghino 1891
†Pelecyodon bombifrons Ameghino 1894
†Pelecyodon cristatus Ameghino 1891
†Pelecyodon maximus Ameghino 1891
†Pelecyodon petraeus Ameghino 1891
†Pelecyodon robustus Ameghino 1891
G. †Schismotherium Ameghino 1887
+
†Schismotherium binum Amghino 1887
†Schismotherium fractum Ameghino 1887
+
Invalid names: Hapalops ellipticus Ameghino 1887 [synonym], Stenocephalus cognatus Mercerat 1891 [synonym]
†Schismotherium splendens Ameghino 1887
G. †Similhapalops Pujos et al. 2021
+
†Similhapalops nivis Pujos et al. 2021
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: phosphaticsubp
Maximum body mass: 80 kgg
Minimum body mass: 40 kgg
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingo
Diet: omnivoreo
Reproduction: viviparoussubc
Created: 2005-08-26 13:20:40
Modified: 2005-08-26 15:20:40
Source: g = genus, o = order, subc = subclass, c = class, subp = subphylum
References: Hendy et al. 2009, Nowak 1999, Vizcaíno et al. 2010, Ji et al. 2002, Carroll 1988, Lillegraven 1979

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): 33.9 Ma

Collections (662 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Bartonian - Priabonian41.3 - 33.9Antarctica Megalonychidae indet. (31173)
Deseadan29.0 - 21.0Bolivia Megalonychidae indet. (95688)
Deseadan29.0 - 21.0Bolivia (La Paz) Megalonychidae indet. (133611)
Deseadan29.0 - 21.0Argentina (Santa Cruz) Deseadognathus riggsi (220634)
Deseadan29.0 - 21.0Argentina (Mendoza) Megalonychidae indet. (176466)
Late/Upper Oligocene28.4 - 23.03Argentina (Mendoza) Similhapalops nivis (220946)
Early/Lower Miocene23.03 - 15.97Argentina (Santa Cruz) Prepoplanops boleadorensis (204145)
Early/Lower Miocene23.03 - 15.97Cuba (Sancti Spiritus) Imagocnus zazae (31183)
Miocene23.03 - 5.333USA (California) Megalonychidae indet. (19376)
Miocene - Pleistocene23.03 - 0.0117Argentina (Santa Cruz) Megatherium sp. (54123)
Colhuehuapian21.0 - 17.5Argentina (Chubut) Megalonychidae indet., Hapaloides sp., Proschismotherium sp., Holomegalonyx sp. (141368)
Colhuehuapian21.0 - 17.5Argentina (Mendoza) Planopinae indet. (189519 189521)
Burdigalian20.44 - 15.97Colombia (La Guajira) Megatheriidae sp. (166506)
Burdigalian20.44 - 15.97Argentina (Santa Cruz) Hapalops sp. (59319) Megatherioidea indet. (59133)
Burdigalian20.44 - 15.97Argentina (Chubut) Megatherioidea indet. (176205)
Burdigalian20.44 - 15.97Chile (Magallanes) Megalonychidae indet. (204203)
Burdigalian20.44 - 15.97Chile (Aisén) Hapalops sp. (71843)
Burdigalian - Langhian20.44 - 13.82Bolivia Megatheriinae indet., Xyophorus bondesioi (91435)
Burdigalian - Langhian20.44 - 13.82Colombia (Guajira) Hyperleptus sp. (145271)
Burdigalian - Langhian20.44 - 13.82Argentina (Santa Cruz) Megatherioidea indet., Prepoplanops boleadorensis (197691)