Biology:Eopachyrucos

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Short description: Extinct genus of notoungulates

Eopachyrucos
Temporal range: Middle Eocene-Late Oligocene (Mustersan-Deseadan)
~48–23.0 Ma
Eopachyrucos mandible.png
Mandible of Eopachyrucos pliciformis
Scientific classification e
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Notoungulata
Family: Interatheriidae
Subfamily: Interatheriinae
Genus: Eopachyrucos
Ameghino 1901
Type species
Eopachyrucos pliciformis
Ameghino, 1901
Species
  • E. pliciferus Ameghino 1901
  • E. pliciformis Ameghino 1894
  • E. ranchoverdensis Reguero et al. 2003
Synonyms
  • Eupachyrucos Ameghino 1906

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]

Taxonomy

Eopachyrucos 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

Eopachyrucos pliciferus

Santiagorothia chiliensis

Federicoanaya sallaensis

Brucemacfaddenia boliviensis

Archaeophylus patrius

Progaleopithecus tournoueri

Argyrohyrax proavus

Interatherium robustum

Cochilius volvens

Protypotherium australe

Protypotherium endiadys

Protypotherium distinctum

Protypotherium sinclairi

Miocochilius federicoi

Miocochilius anamopodus

Protypotherium minutum

Protypotherium colloncurensis

References

  1. 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. https://www.biodiversitylibrary.org/bibliography/5169. 
  2. 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. http://www.andeangeology.cl/index.php/revista1/article/view/V41n1-a09/html. 
  3. Reguero, Marcelo A.; Ubilla, Martín; Perea, Daniel (2003-06-17). [0445:ANSOEM2.0.CO;2 "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:ANSOEM2.0.CO;2]. ISSN 0272-4634. https://doi.org/10.1671/0272-4634(2003)023[0445:ANSOEM]2.0.CO;2. 
  4. Ameghino, Florentino (1901). Notices préliminaires sur des ongulés nouveaux des terrains crétacés de Patagonie. 
  5. 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. 

Wikidata ☰ Q113638577 entry