Incamys

Incamys is an extinct genus of chinchillid rodent that lived during the Late Oligocene (Deseadan) in what is now South America. Fossils of this genus have been found in the Salla Formation of Bolivia and the Agua de la Piedra[1] and Sarmiento Formations of Argentina.[2]

Incamys
Temporal range: Late Oligocene (Deseadan)
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Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Chinchillidae
Genus: Incamys
Hoffstetter and Lavocat 1970
Type species
Incamys bolivianus
Species
Synonyms
  • I. pretiosus Lavocat 1976

Taxonomy

Incamys was first described by Hoffstetter and Lavocat, based on remains found in the Salla Formation of Bolivia, with the proposed type species being Incamys bolivianus, referring to the country it was found in. Later, in 1976, a new species was named, I. pretiosus,[3] which was subsequently found to be a junior synonym of the type species. In 2015, Vucetich and colleagues described a new species of Incamys, I. menniorum, from the Sarmiento Formation of Chubut Province, Argentina.[4]

The following cladogram of the Caviomorpha is based on Busker et al. 2020, showing the position of Incamys.[5]

Baluchimyinae

Bugtimys zafarullahi

"Phiomorpha"

Phiomys andrewsi

Metaphiomys schaubi

Octodontoidea

Prospaniomys priscus

Myocastor coypus

Echimyidae

Proechimys polioplus

Eumysops laeviplicatus

Kannabaetomys amblyonyx

Echimys chrysurus

Ctenomyidae

Ctenomys australis

Plataeomys brevis

Pithanotomys columnaris

Octomys mimax

Octodontomys gliroides

Chasichimys bonaerense

Chasicomys octodontiforme

Acarechimys leucotheae

Acarechimys minutus

Acaremyidae

Acaremys murinus

Galileomys antelucanus

Galileomys baios

Erethizontoidea

Steiromys detentus

Eosteiromys homogenidens

Dasyproctidae

Dasyprocta azarae

Node A

Eoviscaccia frassinettii

Eoviscaccia boliviana

Garridomys curunuquem

Incamys bolivianus

Asteromys bolivianus

Asteromys punctus

Cephalomyidae

Cephalomys ceciae

Cephalomyopsis hypselodontus

Litodontomys chubutensis

Cephalomys arcidens

Scotamys antiquus

Neoepiblemidae

Perimys intermedius

Chinchillidae

Lagostomus maximus

Lagidium viscacia

Chinchilla chinchilla

Node B

Banderomys leanzai

Soriamys ganganensis

Soriamys gaimanensis

Luantus propheticus

Guiomys unica

Microcavia australis

Cavia aperea

Galea musteloides

Dolichotis patagonum

References

  1. Candela, Adriana M.; Pérez, M. Encarnación; Rasia, Luciano L.; Cerdeño, Esperanza (2021-03-04). "New late Oligocene caviomorph rodents from Mendoza Province, central-western Argentina". Journal of Vertebrate Paleontology. 41 (2): e1929264. doi:10.1080/02724634.2021.1929264. ISSN 0272-4634.
  2. Patterson, B.; Wood, Albert Elmer (1982). "Rodents from the Deseadan Oligocene of Bolivia and the relationships of the caviomorpha". Bulletin of the Museum of Comparative Zoology. 149: 371–543. ISSN 0027-4100.
  3. Lavocat, René (1976). "Rongeurs Caviomorphes de l'Oligocène de Bolivie. 2 Rongeurs du Bassin Deseadien de Salla-Luribat". Palaeovertebrata. 7: 15–90.
  4. Vucetich, M.G.; Dozo, M.T.; Arnal, M.; Pérez, M.E. (2015-02-17). "New rodents (Mammalia) from the late Oligocene of Cabeza Blanca (Chubut) and the first rodent radiation in Patagonia". Historical Biology. 27 (2): 236–257. doi:10.1080/08912963.2014.883506. ISSN 0891-2963.
  5. Busker, Felipe; Dozo, María Teresa; Soto, Ignacio María (2020-10-01). "New remains of Cephalomys arcidens (Rodentia, Caviomorpha) and a redefinition of the enigmatic Cephalomyidae". Journal of Systematic Palaeontology. 18 (19): 1589–1629. doi:10.1080/14772019.2020.1796833. ISSN 1477-2019.
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