Eopachyrucos is an extinct genus of interatheriid notoungulates that lived from the Middle Eocene to the Late Oligocene of Argentina and Uruguay.[1] Fossils of this genus have been found in the Sarmiento Formation of Argentina and the Fray Bentos Formation of Uruguay.[2][3]
| Eopachyrucos | |
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| Mandible of Eopachyrucos pliciformis | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | †Notoungulata |
| Family: | †Interatheriidae |
| Subfamily: | †Interatheriinae |
| Genus: | †Eopachyrucos Ameghino 1901 |
| Type species | |
| †Eopachyrucos pliciformis Ameghino, 1901
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| Species | |
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| Synonyms | |
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Taxonomy
editEopachyrucos was first named in 1901 by Florentino Ameghino based on fragmentary remains found in the Sarmiento Formation of Argentina.[4] He originally considered it as a member of the family Hegetotheriidae, as an ancestor of Pachyrukhos, as reflected in its name ("dawn Pachyrukhos"), however, recent studies have confirmed it to be a member of the family Interatheriidae, more specifically within the subfamily Interatheriinae.
The following cladogram of the Interatheriinae is based on Vera et al. 2017, showing the position of Eopachyrucos.[5]
| Interatheriinae |
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References
edit- ^ Hitz, Ralph B.; Reguero, Marcelo; Wyss, André R.; Flynn, John J. (2000). "New interatheriines (Interatheriidae, notoungulata) from the Paleogene of central Chile and southern Argentina". Fieldiana. 42: 1–42. doi:10.5962/bhl.title.5169. hdl:11336/111062.
- ^ Dozo, María Teresa; Ciancio, Martín; Bouza, Pablo José; Martínez, Gastón (2014). "New association of Paleogene Mammals in Eastern of Patagonia (Chubut Province, Argentina): biochronological and paleobiogeographical implications". Andean Geology. 41 (1). doi:10.5027/andgeoV41n1-a09. hdl:11336/27088.
- ^ Reguero, Marcelo A.; Ubilla, Martín; Perea, Daniel (2003-06-17). "A new species of Eopachyrucos (Mammalia, Notoungulata, Interatheriidae) from the Late Oligocene of Uruguay". Journal of Vertebrate Paleontology. 23 (2): 445–457. doi:10.1671/0272-4634(2003)023[0445:ANSOEM]2.0.CO;2. ISSN 0272-4634. S2CID 85678430.
- ^ Ameghino, Florentino (1901). Notices préliminaires sur des ongulés nouveaux des terrains crétacés de Patagonie.
- ^ Vera, Bárbara Soledad; Reguero, Marcelo Alfredo; Gonzalez, Laureano Raul (December 2017). "The Interatheriinae notoungulates from the middle Miocene Collón Curá Formation in Argentina". Acta Palaeontologica Polonica. 62. doi:10.4202/app.00373.2017. hdl:11336/56874.