Extinct genus of rodents
Perimys Left m1 and m2 ofPerimys sp. Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Rodentia Family: † Neoepiblemidae Genus: † Perimys Ameghino, 1887 Type species †Perimys erutus Species P. ameghinoi Scott 1905 P. dissimilis Ameghino 1902 P. erutus Ameghino 1887 P. impactus Ameghino 1894 P. incavatus Ameghino 1902 P. incurvus Ameghino 1902 P. intermedius Kramarz 2002 P. oemulus Ameghino 1894 P. onustus Ameghino 1887 P. pacificus Ameghino 1894 P. perpinguis Ameghino 1891 P. planaris Ameghino 1891 P. puellus Ameghino 1891 P. pueraster Ameghino 1891 P. scalabrinianus Ameghino 1889 P. transversus Ameghino 1902 Synonyms Sphodromys Ameghino 1887
Perimys neoepiblemid rodent that lived from the Early to Late Miocene in what is nowSouth America . Fossils have been found in theCerro Bandera ,[ 1] Cerro Boleadoras ,[ 2] Ituzaingó ,Santa Cruz ,[ 3] Sarmiento Formations ofArgentina ,[ 4] Galera ,[ 5] Santa Cruz [ 6] Río Frías Formations ofChile .
Perimys was a medium to large-sized rodent.Perimys can be distinguished from other caviomorphs in having euhypsodont and bilophodont cheek teeth, with the hypoflexus/id being conspicuously broader and filled with morecementum than inProlagostomus Pliolagostomus Perimys have a U-shape occlusal outline.[ 2]
Perimys was first described by Florentino Ameghino in 1887 based on remains found in the Santa Cruz Formation of Argentina, with the proposed type species beingPerimys erutus Eryomyidae ,[ 7] Neoepiblemidae family.[ 8] [ 9]
The following cladogram of theCaviomorpha is based on Buskeret al. 2020, showing the position ofPerimys .[ 8]
^ 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 ^a b Vizcaino, Sergio F.; Bargo, M. Susana; Pérez, M. Encarnación; Aramendía, Inés; Cuitiño, José I.; Monsalvo, Eduardo S.; Vlachos, Evangelos; Noriega, Jorge I.; Kay, Richard F. (2022-09-30)."Fossil vertebrates of the early-middle Miocene Cerro Boleadoras Formation, northwestern Santa Cruz Province, Patagonia, Argentina" .Andean Geology .49 (3):382– 422.Bibcode :2022AndGe..49..382V .doi :10.5027/andgeoV49n3-3425 ISSN 0718-7106 . Creative Commons Attribution 3.0 International License ^ Kramarz, Alejandro (2014-06-08)."Roedores chinchilloideos (Hystricognathi) de la Formación Pinturas, Mioceno temprano-medio de la provincia de Santa Cruz, Argentina" .Revista del Museo Argentino de Ciencias Naturales . Nueva Serie.4 (2):167– 180.ISSN 1853-0400 . ^ 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 ^ McGrath, Andrew J.; Chick, Jennifer; Croft, Darin A.; Dodson, Holly E.; Flynn, John J.; Wyss, André R. (2022-02-08)."Cavioids, Chinchilloids, and Erethizontoids (Hystricognathi, Rodentia, Mammalia) of the Early Miocene Pampa Castillo Fauna, Chile" .American Museum Novitates (3984):1– 46.doi :10.1206/3984.1 ISSN 0003-0082 . ^ Bostelmann, J. Enrique; Roux, Jacobous P. Le; Vásquez, Ana; Gutiérrez, Néstor M.; Oyarzún, José Luis; Carreño, Catalina; Torres, Teresa; Otero, Rodrigo; Llanos, Andrea; Fanning, C. Mark; Hervé, Francisco (2013-07-25)."Burdigalian deposits of the Santa Cruz Formation in the Sierra Baguales, Austral (Magallanes) Basin: Age, depositional environment and vertebrate fossils" .Andean Geology 40 (3):458– 489.doi :10.5027/andgeoV40n3-a04 hdl :10533/138811 ISSN 0718-7106 . ^ Ameghino, Florentino (1891)."Nuevos restos de mamíferos fósiles descubiertos por Carlos Ameghino en el Eoceno inferior de la Patagonia austral. — Especies nuevas, adiciones y correcciones" .Revista argentina de historia natural 1 :289– 328. ^a b 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 . ^ 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.
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