Scelidotheriidae
Encyclopedia
Scelidotheriidae is a family of extinct mammals within the order of Pilosa
Pilosa
The order Pilosa is a group of placental mammals, extant today only in the Americas. It includes the anteaters and sloths, including the recently extinct ground sloths....

 and suborder Folivora. This family of ground sloths is related to the other families of extinct ground sloths, being the Megatheriidae
Megatheriidae
Megatheriidae is a family of extinct ground sloths that lived from approximately 23 mya—11,000 years ago, existing for approximately .Megatheriids appeared later in the Oligocene, some 30 million years ago, also in South America. The group includes the heavily-built Megatherium and Eremotherium...

, the Mylodontidae
Mylodontidae
Mylodontidae is a family of extinct mammals within the order of Pilosa and suborder Folivora living from approximately 23 mya—11,000 years ago, existing for approximately . This family of ground sloths is related to the other families of extinct ground sloths, being the Megatheriidae, the...

, the Nothrotheriidae, and the Orophodontidae
Orophodontidae
Orophodontidae is a family of extinct ground sloths within the order of Pilosa and suborder Folivora. The name is often disused with genus members reassigned....

. The only extant families of the suborder Folivora are the Bradypodidae and the Megalonychidae
Megalonychidae
Megalonychidae is a group of sloths including the extinct Megalonyx and the living two toed sloths. Megalonychids first appeared in the early Oligocene, about 35 million years ago, in southern Argentina , and spread as far as the Antilles by the early Miocene...

.

Together with the Mylodontidae and the engimatic Pseudoprepotherium, the scelidotheriids form the superfamily
Taxonomic rank
In biological classification, rank is the level in a taxonomic hierarchy. Examples of taxonomic ranks are species, genus, family, and class. Each rank subsumes under it a number of less general categories...

 Mylodontoidea. Chubutherium
Chubutherium
Chubutherium ferelloii is an extinct species of ground sloth .This species of ground sloth shared many of the traits with members of the Mylodontidae family. C. ferelloii first appeared in the Oligocene and died out during the Middle Miocene. It is related to the Pleistocene genus, Scelidotherium....

is an ancestral and very plesiomorphic member of this family and does not belong to the main group of closely related genera.

FAMILY †SCELIDOTHERIIDAE Ameghino
Florentino Ameghino
Florentino Ameghino was an Argentine naturalist, paleontologist, anthropologist and zoologist.Born in Luján, son of Italian immigrants, Ameghino was a self-taught naturalist, and focused his study on the lands of the southern Pampas...

, 1889
  • Genus †Chubutherium
    Chubutherium
    Chubutherium ferelloii is an extinct species of ground sloth .This species of ground sloth shared many of the traits with members of the Mylodontidae family. C. ferelloii first appeared in the Oligocene and died out during the Middle Miocene. It is related to the Pleistocene genus, Scelidotherium....

    (basal)
  • Subfamily †Scelidotheriinae
    • Genus †Scelidotheriops
    • Genus †Analcitherium
    • Genus †Nematherium
    • Genus †Neonematherium
    • Genus †Elassotherium
    • Genus †Scelidotherium
      Scelidotherium
      Scelidotherium is an extinct genus of actively mobile ground sloth of the family Mylodontidae, endemic to South America during the middle Pleistocene epoch. It lived from 780,000—11,000 years ago, existing for approximately ....

    • Genus †Catonyx
      Catonyx
      Catonyx is an extinct genus of actively mobile ground sloth of the family Mylodontidae, endemic to South America during the Late Pleistocene epochs. It lived from 126,000—11,000 years ago, existing for approximately ....

    • Genus †Proscelidodon

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