Hapaloides

Hapaloides; Temporal range: Early Miocene (Colhuehuapian) ; ~21.0–17.5 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Pilosa
Family:	†Megalonychidae
Subfamily:	†Ortotheriinae
Genus:	†Hapaloides; Ameghino, 1902
Type species
	†Hapaloides ignavus; Ameghino, 1902
Other species
	†H. laevisculus Ameghino, 1902; †H. ponderosus Ameghino, 1902;

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

^ ^a ^b R. L. Carroll. (1988). Vertebrate Paleontology and Evolution 1–698
^ ^a ^b ^c 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. Retrieved 11 August 2022.
^ "Proschismotherium". Fossilworks. Retrieved 11 August 2022.
^ McKenna & Bell (1997) Classification of Mammals Above the Species Level