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Megalonyx jeffersonii (Jefferson's ground sloth)
Taxonomy
Megatherium jeffersonii was named by Desmarest (1822). It is the type species of Megalonyx.
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), Hay (1930), 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), Hay (1930), 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 |
1855 | Megalonyx jeffersonii Leidy |
1873 | Megalonyx jeffersoni Leidy p. 229 |
1902 | Megalonyx jeffersonii Hay p. 577 |
1913 | Megalonyx californicus Stock |
1930 | Megalonyx jeffersonii Hay p. 408 |
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: 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]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
References: Ji et al. 2002, Carroll 1988, Hendy et al. 2009, Nowak 1991, Lillegraven 1979 |
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 (South Carolina) | Megalonyx jeffersonii (65405) | |
Pleistocene | USA (Tennessee) | Megalonyx jeffersonii (93373) | |
Pleistocene | USA (Texas) | Megalonyx sp. (85140) | |
Pleistocene | USA (Florida) | Megalonyx jeffersoni (227368) | |
Pleistocene | USA (West Virginia) | Megalonyx jeffersonii (108095) | |
Pleistocene | USA (Mississippi) | Megalonyx jeffersoni (161954) | |
Irvingtonian | USA (South Carolina) | Megalonyx jeffersonii (79919) | |
Irvingtonian | USA (Alabama) | Megalonyx jeffersonii (20281) | |
Irvingtonian | USA (Montana) | Megalonyx jeffersonii (20310) | |
Irvingtonian | USA (Oklahoma) | Megalonyx jeffersonii (20382) | |
Irvingtonian | USA (Iowa) | Megalonyx jeffersonii (20556) | |
Middle Pleistocene | USA (Virginia) | Megalonyx jeffersonii (104662) | |
Middle Pleistocene | USA (South Carolina) | Megalonyx jeffersonii (79767 79768) | |
Rancholabrean | USA (South Carolina) | Megalonyx jeffersonii (79757 79760) | |
Rancholabrean | USA (Texas) | Megalonyx jeffersonii (225289) | |
Rancholabrean (glacial) | USA (California) | Megalonyx jeffersonii (20624) | |
Late/Upper Pleistocene (interglacial) | Canada (Yukon) | Megalonyx jeffersonii (20626) | |
Late/Upper Pleistocene (interglacial) | USA (Idaho) | Megalonyx jeffersonii (20569 20612) | |
Late/Upper Pleistocene (late glacial) | USA (Ohio) | Megalonyx jeffersonii (93208) | |
Late/Upper Pleistocene | USA (Illinois) | Megalonyx jeffersonii (93486) | |
Late/Upper Pleistocene (interglacial) | Canada (Northwest Territories) | Megalonyx jeffersonii (20610) | |
Late/Upper Pleistocene | USA (West Virginia) | Megalonyx jeffersonii (93332) | |
Late/Upper Pleistocene (glacial) | USA (California) | Megalonyx jeffersonii (155393) | |
Late/Upper Pleistocene | USA (South Carolina) | Megalonyx jeffersoni (152904) | |
Late/Upper Pleistocene (interglacial) | USA (California) | Megalonyx jeffersonii (20574) | |
Late/Upper Pleistocene | USA (Florida) | Megalonyx jeffersonii (74292) | |
Late/Upper Pleistocene (late glacial) | USA (Kansas) | Megalonyx jeffersonii (83073) | |
Late/Upper Pleistocene | USA (Virginia) | Megalonyx jeffersonii (103358 104678) | |
Late/Upper Pleistocene (high glacial) | USA (Texas) | Megalonyx brachycephalus (93103) | |
Late/Upper Pleistocene | USA (Texas) | Megalonyx jeffersonii (230753) | |
Late/Upper Pleistocene | USA (Missouri) | Megalonyx jeffersoni (93379) | |
Late/Upper Pleistocene (late glacial) | USA (Utah) | Megalonyx jeffersonii (93266) | |
Late/Upper Pleistocene (late glacial) | USA (Illinois) | Megalonyx jeffersonii (93209) | |
Late/Upper Pleistocene (interglacial) | USA (Alabama) | Megalonyx jeffersonii (20584) | |
Late/Upper Pleistocene | USA (Arkansas) | Megalonyx jeffersoni (216259) | |
Late/Upper Pleistocene (late glacial) | USA (North Dakota) | Megalonyx jeffersonii (93268) | |
Late/Upper Pleistocene - Holocene | USA (Missouri) | Megalonyx jeffersonii (63563) |