Eoviscaccia

Eoviscaccia Temporal range: Early Oligocene-Early Miocene (Tinguirirican-Colhuehuapian) ~33.9–17.5 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Family:	Chinchillidae
Genus:	†Eoviscaccia Vucetich, 1989
Type species
†Eoviscaccia boliviana Vucetich, 1989
Species
E. australis Vucetich, 1989 E. boliviana Vucetich, 1989 E. frassinettii Bertrand et al. 2012

Eoviscaccia is an extinct genus of chinchillid rodent that lived during the Early Oligocene (Tinguirirican) to the Early Miocene (Colhuehuapian) in what is now South America. Fossils of this genus have been found in the Cerro Bandera,[1] Chichinales,[2] Fray Bentos,[3] and Sarmiento Formations[4][5][6] of Argentina, the Salla Formation of Bolivia,[6] and the Abanico Formation of Chile.[7]

Taxonomy

Eoviscaccia was first described by María Guiomar Vucetich in 1989 based on remains found in the Salla Formation of Bolivia and the Sarmiento Formation of Chubut Province, Argentina, with the proposed type species being Eoviscaccia boliviana.[6] Two other species, E. australis and E. frassinettii, were both named in 1989 and 2012 respectively, with E. australis being found in Chubut, Entre Ríos, Neuquén, and Río Negro Provinces of Argentina, while E. frassinettii was found in the Abanico Formation of Chile.[7]

The following cladogram of the Caviomorpha is based on Busker et al. 2020, showing the position of Eoviscaccia.[8]

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. Kramarz, Alejandro; Garrido, Alberto; Forasiepi, Analía; Bond, Mariano; Tambussi, Claudia (2005). "Stratigraphy and vertebrates (Aves and Mammalia) from the Cerro Bandera Formation, Early Miocene of Neuquén Province, Argentina". Revista Geológica de Chile. 32 (2). doi:10.4067/S0716-02082005000200006.
2. Madden, Richard H.; Carlini, Alfredo A.; Vucetich, Maria Guiomar; Kay, Richard F. (2010-06-17). "Colhuehuapian rodents from Gran Barranca and other Patagonian localities: the state of the art.". The Paleontology of Gran Barranca: Evolution and Environmental Change Through the Middle Cenozoic of Patagonia. Cambridge University Press. ISBN 978-0-521-87241-6.
3. Bond, Mariano; López, Guillermo; Reguero, Marcelo A.; Scillato-Yané, Gustavo J.; Vucetich, María G. (1998). "Los mamíferos de la Formación Fray Bentos (Edad Mamífero Deseadense, Oligoceno superior?) de las provincias de Corrientes y Entre Ríos, Argentina". Publicación Electrónica de la Asociación Paleontológica Argentina (in Spanish). 5 (1). ISSN 2469-0228.
4. Kramarz, Alejandro Gustavo (2001). "Registro de Eoviscaccia (Rodentia, Chinchillidae) en estratos colhuehuapenses de Patagonia, Argentina". Ameghiniana (in Spanish). 38 (3): 237–242. ISSN 1851-8044.
5. Arnal, M.; Vucetich, M.G. (2015-01-02). "Revision of the fossil rodent Acaremys Ameghino, 1887 (Hystricognathi, Octodontoidea, Acaremyidae) from the Miocene of Patagonia (Argentina) and the description of a new acaremyid". Historical Biology. 27 (1): 42–59. Bibcode:2015HBio...27...42A. doi:10.1080/08912963.2013.863881. hdl:11336/13646. ISSN 0891-2963.
6. Vucetich, María Guiomar (1989). "Rodents (Mammalia) of the Lacayani fauna revisited (Deseadan, Bolivia). Comparison with new Chinchillidae and Cephalomyidae from Argentina". Bulletin du Muséum national d'histoire naturelle. 11 (4): 233–247.
7. Bertrand, Ornella C.; Flynn, John J.; Croft, Darin A.; Wyss, Andre R. (2012). "Two New Taxa (Caviomorpha, Rodentia) from the Early Oligocene Tinguiririca Fauna (Chile)". American Museum Novitates (3750): 1–36. doi:10.1206/3750.2. ISSN 0003-0082.
8. 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. Bibcode:2020JSPal..18.1589B. doi:10.1080/14772019.2020.1796833. ISSN 1477-2019. S2CID 225308634.