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Megalonyx jeffersonii (Jefferson's ground sloth)
Taxonomy
Megatherium jeffersonii was named by Desmarest (1822).
It was misspelled as Megalonyx jeffersoni by Leidy (1873) and Olson (1940); it was recombined as Megalonyx jeffersonii by Harlan (1825), Leidy (1855), Hay (1902), Lundelius (1972), Kurten and Anderson (1980), Thurmond and Jones (1981), Forster and Spamer (1986), Pujos et al. (2007) and McDonald and Naples (2007).
It was misspelled as Megalonyx jeffersoni by Leidy (1873) and Olson (1940); it was recombined as Megalonyx jeffersonii by Harlan (1825), Leidy (1855), Hay (1902), Lundelius (1972), Kurten and Anderson (1980), Thurmond and Jones (1981), Forster and Spamer (1986), Pujos et al. (2007) and McDonald and Naples (2007).
Synonyms
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Synonymy list
Year | Name and author |
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1822 | Megatherium jeffersonii Desmarest |
1825 | Megalonyx jeffersonii Harlan |
1831 | Megalonyx laqueatus Harlan |
1853 | Ereptodon priscus Leidy p. 241 |
1855 | Megalonyx dissimilis Leidy |
1855 | Megalonyx jeffersonii Leidy |
1873 | Megalonyx jeffersoni Leidy p. 229 |
1899 | Megalonyx priscus Cope |
1902 | Megalonyx dissimilis Hay p. 577 |
1902 | Megalonyx jeffersonii Hay p. 577 |
1902 | Ereptodon priscus Hay p. 578 |
1905 | Megalonyx sierrensis Sinclair |
1913 | Megalonyx californicus Stock |
1938 | Megalonyx milleri Lyon |
1940 | Megalonyx jeffersoni Olson p. 45 |
1940 | Megalonyx hogani Stovall |
1941 | Megalonyx brachycephalus Sellards p. 71 |
1950 | Megalonyx brachycephalus Stovall and McAnulty |
1966 | Megalonyx brachycephalus Slaughter p. 80 |
1972 | Megalonyx jeffersonii Lundelius, Jr. |
1980 | Megalonyx jeffersonii Kurten and Anderson p. 137 |
1981 | Megalonyx jeffersonii Thurmond and Jones p. 178 |
1986 | Megalonyx jeffersonii Forster and Spamer p. 183 |
2007 | Megalonyx jeffersonii McDonald and Naples p. 154 |
2007 | Megalonyx jeffersonii Pujos et al. |
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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.
†Megalonyx jeffersonii Desmarest 1822 [Jefferson's ground sloth]
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Invalid names: Ereptodon priscus Leidy 1853 [synonym], Megalonyx brachycephalus Sellards 1941 [synonym], Megalonyx californicus Stock 1913 [synonym], Megalonyx dissimilis Leidy 1855 [synonym], Megalonyx hogani Stovall 1940 [synonym], Megalonyx laqueatus Harlan 1831 [synonym], Megalonyx milleri Lyon 1938 [synonym], Megalonyx sierrensis Sinclair 1905 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
References: Hendy et al. 2009, Ji et al. 2002, Nowak 1991, Lillegraven 1979, Carroll 1988 |
Age range: base of the Irvingtonian to the top of the Rancholabrean or 1.80000 to 0.01200 Ma
Collections (43 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Early/Lower Pleistocene | USA (Arizona) | Megalonyx jeffersonii (85145) | |
Pleistocene | USA (Illinois) | Megalonyx jeffersonii (87059) | |
Pleistocene | USA (Mississippi) | Megalonyx jeffersoni (161954) | |
Pleistocene | USA (Texas) | Megalonyx sp. (85140) | |
Pleistocene | USA (Tennessee) | Megalonyx jeffersonii (93373) | |
Pleistocene | USA (West Virginia) | Megalonyx jeffersonii (108095) | |
Pleistocene | USA (South Carolina) | Megalonyx jeffersonii (65405) | |
Pleistocene | USA (Florida) | Megalonyx jeffersoni (227368) | |
Irvingtonian | USA (Oklahoma) | Megalonyx jeffersonii (20382) | |
Irvingtonian | USA (Montana) | Megalonyx jeffersonii (20310) | |
Irvingtonian | USA (Iowa) | Megalonyx jeffersonii (20556) | |
Irvingtonian | USA (Alabama) | Megalonyx jeffersonii (20281) | |
Irvingtonian | USA (South Carolina) | Megalonyx jeffersonii (79919) | |
Middle Pleistocene | USA (South Carolina) | Megalonyx jeffersonii (79767 79768) | |
Middle Pleistocene | USA (Virginia) | Megalonyx jeffersonii (104662) | |
Rancholabrean | USA (Texas) | Megalonyx jeffersonii (225289) | |
Rancholabrean (glacial) | USA (California) | Megalonyx jeffersonii (20624) | |
Rancholabrean | USA (South Carolina) | Megalonyx jeffersonii (79757 79760) | |
Late/Upper Pleistocene (interglacial) | Canada (Northwest Territories) | Megalonyx jeffersonii (20610) | |
Late/Upper Pleistocene (late glacial) | USA (Utah) | Megalonyx jeffersonii (93266) | |
Late/Upper Pleistocene (interglacial) | USA (California) | Megalonyx jeffersonii (20574) | |
Late/Upper Pleistocene (late glacial) | USA (Illinois) | Megalonyx jeffersonii (93209) | |
Late/Upper Pleistocene | USA (Texas) | Megalonyx jeffersonii (230753) | |
Late/Upper Pleistocene (late glacial) | USA (Ohio) | Megalonyx jeffersonii (93208) | |
Late/Upper Pleistocene (late glacial) | USA (Kansas) | Megalonyx jeffersonii (83073) | |
Late/Upper Pleistocene | USA (West Virginia) | Megalonyx jeffersonii (93332) | |
Late/Upper Pleistocene (interglacial) | Canada (Yukon) | Megalonyx jeffersonii (20626) | |
Late/Upper Pleistocene | USA (Florida) | Megalonyx jeffersonii (74292) | |
Late/Upper Pleistocene | USA (Virginia) | Megalonyx jeffersonii (103358 104678) | |
Late/Upper Pleistocene | USA (Illinois) | Megalonyx jeffersonii (93486) | |
Late/Upper Pleistocene | USA (Missouri) | Megalonyx jeffersoni (93379) | |
Late/Upper Pleistocene (high glacial) | USA (Texas) | Megalonyx brachycephalus (93103) | |
Late/Upper Pleistocene (late glacial) | USA (North Dakota) | Megalonyx jeffersonii (93268) | |
Late/Upper Pleistocene (interglacial) | USA (Alabama) | Megalonyx jeffersonii (20584) | |
Late/Upper Pleistocene (glacial) | USA (California) | Megalonyx jeffersonii (155393) | |
Late/Upper Pleistocene (interglacial) | USA (Idaho) | Megalonyx jeffersonii (20569 20612) | |
Late/Upper Pleistocene | USA (Arkansas) | Megalonyx jeffersoni (216259) | |
Late/Upper Pleistocene | USA (South Carolina) | Megalonyx jeffersoni (152904) | |
Late/Upper Pleistocene - Holocene | USA (Missouri) | Megalonyx jeffersonii (63563) |