Superregnum: Eukaryota
Cladus: Orthokaryota
Cladus: Neokaryota
Cladus: Scotokaryota
Cladus: Podiata
Cladus: Amorphea
Cladus: Obazoa
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: ParaHoxozoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Olfactores
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Cladus: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Cladus: Synapsida
Cladus: Eupelycosauria
Cladus: Metopophora
Cladus: Haptodontiformes
Cladus: Sphenacomorpha
Cladus: Sphenacodontia
Cladus: Therapsida
Cladus: Theriodontia
Cladus: Eutheriodontia
Cladus: Cynodontia
Cladus: Epicynodontia
Cladus: Eucynodontia
Cladus: Probainognathia
Cladus: Prozostrodontia
Cladus: Mammaliamorpha
Cladus: Mammaliaformes
Classis: Mammalia
Cladus: Theriimorpha
Cladus: Theriiformes
Cladus: Trechnotheria
Cladus: Cladotheria
Cladus: Prototribosphenida
Cladus: Zatheria
Cladus: Tribosphenida
Cladus: Boreosphenida
Subclassis: Theria
Cladus: Eutheria
Infraclassis: Placentalia
Superordo: Xenarthra
Ordo: Pilosa
Subordo: Folivora
Familia: †Megatheriidae
Subfamilia: Schismotheriinae
Genus: Hapaloides
Hapaloides is an extinct genus of ground sloth of the family Megalonychidae, endemic to Argentina during the Early Miocene. It lived from 21.0 mya to 17.5 mya, existing (as a genus) for approximately 3.5 million years.[1]
Found in the Colhuehuapian-aged Colpodon Beds of Argentina, three species are known: H. ignavus (the type species), H. laevisculus and H. ponderosus, all named by Florentino Ameghino in 1902.[2] H. ignavus is known from a partial cranium that is smaller than that of Hapalops rectangularis, which it was compared to.[2]
Ameghino in 1902 placed Hapaloides in the Megatheriidae,[2] alongside Proschismotherium, which was its sister taxon,[3][4] while more recent taxonomic reviews place Hapaloides within Megalonychidae.[1][5]
References
R. L. Carroll. (1988). Vertebrate Paleontology and Evolution 1–698
Ameghino, Florentino (1902). "Première contribution a la connaissance de la faune mammalogique des couches a Colpodon [First contribution to the knowledge of the mammalian fauna of the Colpodon Beds]". Boletin de la Academia Nacional de Ciencias en Córdoba, República Argentina. 17: 71–141 [131–133].
"Hapaloides". Fossilworks. Archived from the original on 17 August 2022. Retrieved 11 August 2022.
"Proschismotherium". Fossilworks. Archived from the original on 26 September 2021. Retrieved 11 August 2022.
McKenna & Bell (1997) Classification of Mammals Above the Species Level
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