PBDB Taxon

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

Megatherium celendinense

Mammalia - Megatheriidae

Taxonomy

Megatherium celendinense was named by Pujos (2006). It is considered to be a form taxon. Its type specimen is MUSM 157, a partial skeleton (Incomplete skeleton), and it is a 3D body fossil.

Sister species lacking formal opinion data

M. tarijensis, M. uquiensis

Synonymy list

Year	Name and author
2006	Megatherium celendinense Pujos

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
subclass	Synapsida
—	Therapsida	()
infraorder	Cynodontia	()

Rank	Name	Author
—	Mammaliamorpha
—	Mammaliaformes
class	Mammalia
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
—	Placentalia
—	Americatheria
—	Xenarthra	()
infraorder	Pilosa	Flower 1883
—	Folivora
class	Eufolivora	Delsuc et al. 2001
superfamily	Megatherioidea	Gray 1821
—	Megatheria
family	Megatheriidae	()
subfamily	Megatheriinae	Gill 1872
genus	Megatherium	Cuvier 1796
species	celendinense

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.

†Megatherium celendinense Pujos 2006

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Diagnosis

Reference	Diagnosis
F. Pujos 2006	Large Pleistocene Megatheriinae (equivalent to M. americanum, E. laurillardi and E. eomigrans); Y-shaped premaxilla, short, massive (shorter and more massive than M. americanum, not X-shaped as in M. tarijense) and unfused to maxilla (fused in M. americanum and M. alti- planicum); occiput dorsoventrally compressed and per- pendicular to dorsal plane of the cranial roof; occipital condyles transversely expanded and project posteriorly beyond plane of occiput (similar to M. sundti); humerus short, bulky; humeral deltopectoral crest extremely reduced and musculospiral groove poorly marked; anter- ior margin of distal tibial epiphysis rectilinear (generally convex in other Megatheriinae); in anterior view lateral margin of fibula concave (in the proximal quarter) then convex (in the distal three-quarters); discoid and ectal astragalar facets clearly separated in dorsolateral view (contrary to other Megatherium species) and do not join posteriorly (as in Pyramiodontherium, Megathericulus and Eremotherium); short, massive calcaneum (proportionately more elongated in other Megatherium species); ectocunei- form bears a pedestaled articular facet for the MEC (facet present in M. urbinai and M. tarijense but extremely reduced and not pedestaled).