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Megalonyx leptostomus âśť

Description

Megalonyx (Greek, "large claw") is an extinct genus of ground sloths of the family Megalonychidae, which was endemic to North America from the Hemphillian of the Late Miocene through to the Rancholabrean of the Pleistocene, living from ~10.3 Mya—11,000 years ago, existing for approximately 10.289 million years. The type species, M. jeffersonii, measured about 3 meters (9.8 ft) and weighed up to 1,000 kilograms (2,200 lb).


Source Data
SourceIDLink
Global Biodiversity Information Facility ID (GBIF)5931803https://www.gbif.org/species/5931803
PaleoBioDB ID (PBDB)48026https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=48026
Rankspecies
Taxonomy (GBIF)Life : Animalia : Chordata : Mammalia : Pilosa : Megalonychidae : Megalonyx : Megalonyx leptostomus
Taxonomy (PBDB)Life : Animalia : Chordata : Mammalia : Xenarthra : Megalonychidae : Megalonyx : Megalonyx leptostomus
Taxonomic Status (GBIF)accepted
Classification
(PBDB,GBIF)
RankNameAuthor
-Eukaryota
-OpisthokontaCavalier-Smith 1987
kingdomAnimalia
-TriploblasticaLankester 1877
-NephrozoaJondelius et al. 2002
-DeuterostomiaGrobben 1908
phylumChordataHaeckel 1847
subphylumVertebrataLamarck 1801
superclassGnathostomataGegenbauer 1874
-Osteichthyes
-SarcopterygiiRomer 1955
subclassDipnotetrapodomorpha
subclassTetrapodomorpha
-Tetrapoda
-ReptiliomorphaSäve-Söderbergh 1934
-AnthracosauriaSäve-Söderbergh 1934
-Batrachosauria
-Cotylosauria
-AmniotaHaeckel 1866
-SynapsidaOsborn 1903
-Therapsida
infraorderCynodontia
-EpicynodontiaHopson and Kitching 2001
infraorderEucynodontiaKemp 1982
-ProbainognathiaHopson 1990
-MammaliamorphaRowe 1988
-MammaliaformesRowe 1988
classMammaliaLinnaeus 1758
subclassTribosphenida
infraclassEutheria
-PlacentaliaOwen 1837
-AmericatheriaShockey 2017
-Xenarthra
infraorderPilosaFlower 1883
familyMegalonychidaeGervais 1855
genusMegalonyxHarlan 1825
speciesMegalonyx leptostomusCope 1893
Generic NameMegalonyx
Scientific NameMegalonyx leptostomus Cope, 1893
Opinions (PBDB)
NameRankOpinionEvidenceAuthor
Megalonyx leptostomusspeciesbelongs to Megalonyxstated without evidenceCioe, 1893
Status (PBDB)extinct
Taxon Size (PBDB)1
First Recorded Appearance4.90 - 1.80 Ma
Cenozoic
Last Recorded Appearance1.80 - 0.30 Ma
Pleistocene
Environmentterrestrial (based on Eutheria)
Motilityactively mobile (based on Osteichthyes)
Dietfolivore (based on Megalonychidae)
Taphonomyphosphatic (based on Vertebrata)
Primary Reference (PBDB)J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals.
Wikipediahttps://en.wikipedia.org/wiki/Megalonyx_leptostomus

Fossil Distribution

Obsolete Names

NameSourceTaxon RankTaxonomy
Morotherium leptonyx (Marsh, 1874)GBIFspeciesAnimalia : Chordata : Mammalia : Pilosa : Megalonychidae : Megalonyx : Morotherium leptonyx
Megalonyx rohrmanni Gustafson, 1978GBIFspeciesAnimalia : Chordata : Mammalia : Pilosa : Megalonychidae : Megalonyx : Megalonyx rohrmanni
Megalonyx leptonyx (Marsh, 1874)GBIFspeciesAnimalia : Chordata : Mammalia : Pilosa : Megalonychidae : Megalonyx : Megalonyx leptonyx

Synonymy List

YearName and Author
1874Morotherium leptonyx Marsh p. 532
1893Megalonyx leptostomus Cioe
1893Megalonyx leptostomus Cope
1902Megalonyx leptostomus Hay p. 578
1902Morotherium leptonyx Hay p. 580
1935Megalonyx leptonyx Gazin
1978Megalonyx rohrmanni Gustafson
1980Megalonyx leptostomus Kurten and Anderson p. 136
2007Megalonyx leptostomus McDonald and Naples p. 154
2019Megalonyx leptostomus Albright et al. p. 153

References

Alroy J. (2002) Synonymies and reidentifications of North American fossil mammals
Marsh O. C. Notice of new Tertiary mammals. III, American Journal of Science 7 41, 531-534 doi:10.2475/ajs.s3-7.41.531
Hay O. P. (1902) , Bibliography and Catalogue of the Fossil Vertebrata of North America. Bulletin of the United States Geological Survey 179, 1-868
Gazin C. L. (1935) Gravigrade Sloth Remains from the Late Pliocene and Pleistocene of Idaho, Journal of Mammalogy 16 1
Gustafson E. P. (1978) The Vertebrate Faunas of the Pliocene Ringold Formation, South-Central Washington, Bulletin of the Museum of Natural History, University of Oregon 23, 1-62
Kurten B., Anderson E. (1980) , Pleistocene mammals of North America, 1-442
McDonald H. G., Naples V. L. (2007) Xenarthra, Evolution of Tertiary Mammals of North America 2, 147-160
Albright L. B., Sanders A. E., et al (2019) Cenozoic vertebrate biostratigraphy of South Carolina, U.S.A. and additions to the fauna, Bulletin of the Florida Museum of Natural History 57 2, 77-236
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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