Neoreomys Ameghino 1887
Authors/Creators
- 1. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Museo Paleontológico Egidio Feruglio, Av. Fontana 140, U 9100 GYO Trelew, Chubut (Argentina)
- 2. Departamento de Ciencias Biológicas, Universidad de los Andes, 111711 Bogotá DC (Colombia)
- 3. Department of Biology, University of Fribourg, and Swiss Institute of Bioinformatics, Chemin du Musée 10, Fribourg (Switzerland) and Smithsonian Tropical Research Institute, 0843 - 03092, Balboa (Panama)
- 4. Museo de Historia Natural de La Tatacoa, 411028, La Victoria, Huila (Colombia)
- 5. Museo de Historia Natural La Tormenta, Vereda El Líbano, La Victoria, Huila (Colombia)
- 6. Center for Functional Anatomy and Evolution, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205 (United States)
- 7. Department of Biomedical Sciences, Grand Valley State University, Allendale, Michigan 49401 (United States)
Description
Genus Neoreomys Ameghino, 1887
TYPE SPECIES. — Neoreomys australis Ameghino, 1887 by original designation.
REFERRED SPECIES. — Neoreomys australis (type species), Neoreomys huilensi s Fields, 1957, and Neoreomys pinturensis Kramarz, 2006.
GEOGRAPHIC AND STRATIGRAPHIC DISTRIBUTION. — Pinturas and Santa Cruz formations (Early-Middle Miocene) in Chubut and Santa Cruz provinces (Bordas 1939; Kramarz 2006a; Kramarz et al. 2010; Arnal et al. 2019; Montalvo et al. 2019); Chinches Formation (late Early Miocene) in San Juan Province (López et al. 2011); Collón Curá Formation (Middle Miocene) in Chubut, Río Negro and Neuquén provinces (Bondesio et al. 1980; Vucetich et al. 1993); Río Frías Formation (Vucetich 1984), and Río Zeballos Formation (Pérez & Gonzáles Ruiz 2022) Chubut province; La Tiza Formation (Early Miocene), Neuquén Province, Argentina (Garrido et al. 2012). Cura-Mallín Formation (late Early-Middle Miocene) in Biobío Region, Pampa Castillo and Galera formations in Chile (Flynn et al. 2008; Solórzano et al. 2020; McGrath et al. 2022). La Victoria and Villavieja formations (Middle Miocene), in Huila Department, Colombia (Fields 1957; Walton 1997).
REMARKS
Neoreomys differs from Dasyprocta, Myoprocta, and Cuniculus in several characters of the skull and mandible (e.g., development and configuration of the masseteric crest, horizontal crest, notch for the insertion of the tendon of the masseter medialis pars infraorbitalis muscle; development of the bones that conform the zygomatic arch; convergence of the molar series; development of the maxillary and palatine bones in the palate). The crown of the cheek teeth of Dasyprocta and Myoprocta are much lower, and the occlusal surface is more complex than in Neoreomys (e.g., presence and development of lophs/ids; retention of fossettes/ids). Concerning Cuniculus and Capromys, the morphology of the occlusal surface differs from Neoreomys in terms of the depth of the flexi/flexids and the extension of the lophs/ids. The differences between Alloiomys and Neoreomys are detailed inVucetich (1977). Still, they can be highlighted: cheek teeth higher than in Neoreomys, a solid tendency to lamination, abundant cement, and dental series more convergent than in Neoreomys. The cheek teeth in Mesoprocta (Croft et al. 2011a) are higher than in Neoreomys and do not form roots. The flexus/ids and fossetes/ids disappear more quickly with wear and present a significant quantity of cement. Chubutomys and Phanomys differ from Neoreomys in the higher degree of hypsodonty, more ephimerous flexus/ids and fossetes/ids, and less thick enamel layer (see Pérez & Vucetich 2012; Pérez et al. 2012).
On the other hand, Eocardia, Schistomys and Matiamys presents euhypsodonts cheek teeth (continuous growth without root formation) (see Pérez 2010).
Notes
Files
Files
(3.5 kB)
| Name | Size | Download all |
|---|---|---|
|
md5:c1d9870220cd66af177f1ef979d1d60c
|
3.5 kB | Download |
System files
(47.7 kB)
| Name | Size | Download all |
|---|---|---|
|
md5:395bc5cbdbd918a8817e77c8517f639b
|
47.7 kB | Download |
Linked records
Additional details
Identifiers
Biodiversity
- Scientific name authorship
- Ameghino
- Kingdom
- Animalia
- Phylum
- Chordata
- Order
- Rodentia
- Family
- Dasyproctidae
- Genus
- Neoreomys
- Taxon rank
- genus
- Taxonomic concept label
- Neoreomys Ameghino, 1887 sec. Urrea-Barreto, Link, Carrillo, Vanegas, Perdomo, Cooke, Tallman & Pérez, 2023
References
- AMEGHINO F. 1887. - Enumeracion sistematica de las especies de mamiferos fosiles coleccionadas por Carlos Ameghino en los terrenos eocenos de la Patagonia austral. Boletin del Museo de La Plata 1: 1 - 26
- FIELDS R. W. 1957. - Hystricomorph rodents from the late Miocene of Colombia, South America. University of California Publications in Geological Sciences 32: 273 - 404
- BORDAS A. F. 1939. - Diagnosis sobre algunos mamiferos de las capas con Colpodon del valle del rio Chubut (Republica Argetina). Physis 14: 413 - 433
- KRAMARZ A. G. 2006 a. - Neoreomys and Scleromys (Rodentia, Hystricognathi) from the Pinturas Formation, late Early Miocene of Patagonia, Argentina. Revista del Museo Argentino de Ciencias Naturales 53 - 62 (1): 10
- KRAMARZ A. G., VUCETICH M. G., CARLINI A. A., CIANCIO M. R., ABELLO M. A., DESCHAMPS C. M. & GELFO J. N. 2010. - A new mammal fauna at the top of the Gran Barranca sequence and its biochronological significance, in MADDEN R. H., CARLINI A. A., VUCETICH M. G. & KAY R. F. (eds), The Paleontology of Gran Barranca. Evolution and Environmental Change through the Middle Cenozoic of Patagonia. Cambridge University Press, Cambridge: 264 - 277.
- ARNAL M., PEREZ M. & DESCHAMPS C. 2019. - Revision of the Caviomorph rodents from the Rio Santa Cruz (argentinian Patagonia). Publicacion Electronica de la Asociacion Paleontologica Argentina. https: // doi. org / 10.5710 / PEAPA. 25.09.2019.299
- MONTALVO C. I., RAIGEMBORN M. S., TOMASSINI R. L., ZAPATA L., BARGO M. S., UNCAL M. C. M. & VIZCAINO S. F. 2019. - Floodplain taphonomic mode of Early Miocene vertebrates of southern Patagonia, Argentina. Palaios 34 (2): 105 - 120. https: // doi. org / 10.2110 / palo. 2018.087
- LOPEZ G., VUCETICH M. G., CARLINI A., BOND M., PEREZ M. E., CIANCIO M., PEREZ D. J., ARNAL M. & OLIVARES A. 2011. - New Miocene mammal assemblages from Neogene Manantiales basin, Cordillera Frontal, San Juan, Argentina, in SALFITY J. A. & MARQUILLAS R. A. (eds), Cenozoic Geology of the Central Andes of Argentina. SCS Publisher, Salta: 211 - 226.
- BONDESIO P., LAZA J. H., SCILLATO-YANE G., TONNI E. & VUCETICH M. G. 1980. - Estado actual del conocimiento de los vertebrados de la Formacion Arroyo Chasico (Plioceno temprano) de la provincia de Buenos Aires. Actas 3: 101 - 127
- VUCETICH M. G., MAZZONI M. M. & PARDINAS U. F. J. 1993. - Los Roedores de la Formacion Collon Cura (Mioceno: Mmedio), y la Iignimbrita Pilcaniyeu. Canadon del Tordillo, Neuquen. Ameghiniana 30 (4): 361 - 381.
- VUCETICH M. G. 1984. - Los Roedores de la Edad Friasense (Mioceno Medio) de Patagonia. pdf. Revista del Museo de la Plata (50): 47 - 126
- PEREZ M. E. & GONZALES RUIZ L. 2022. - Los roedores caviomorfos (Rodentia, Hystricognathi) del Mioceno de la localidad Cerro Zeballos (Formacion Collon Cura, Chubut, Argentina), XXXIV Jornadas Argentinas de Paleontologia de Vertebrados. Publicacion Electronica de la Asociacion Paleontologica Argentina (21): (R 2) R 39 - R 40.
- GARRIDO A., KRAMARZ A., FORASIEPI A. & BOND M. 2012. - Estratigrafia, mamiferos fosiles y edad de las secuencias volcanosedimentarias eoceno-miocenas de la sierra de Huantraico-sierra Negra y cerro Villegas (provincia del Neuquen, Argentina). Andean Geology 39 (3): 482 - 510. https: // doi. org / 10.5027 / andgeoV 39 n 3 - a 07
- FLYNN J. J., CHARRIER R., CROFT D. A., GANS P. B., HERRIOTT T. M., WERTHEIM J. A. & WYSS A. R. 2008. - Chronologic implications of new Miocene mammals from the Cura-Mallin and Trapa Trapa formations, Laguna del Laja area, south central Chile. Journal of South American Earth Sciences 26 (4): 412 - 423. https: // doi. org / 10.1016 / j. jsames. 2008.05.006
- SOLORZANO A., ENCINAS A., KRAMARZ A., CARRASCO G., MONTOYA-SANHUEZA G. & BOBE R. 2020. - Late early Miocene caviomorph rodents from Laguna del Laja (~ 37 ° S), Cura-Mallin Formation, south-central Chile. Journal of South American Earth Sciences 102: 102658. https: // doi. org / 10.1016 / j. jsames. 2020.102658
- MCGRATH A. J., CHICK J., CROFT D. A., DODSON H. E., FLYNN J. J. & WYSS A. R. 2022. - Cavioids, chinchilloids, and erethizontoids (Hystricognathi, Rodentia, Mammalia) of the early Miocene Pampa Castillo fauna, Chile. American Museum of Natural History 3984: 1 - 46. https: // doi. org / 10.1206 / 3984.1
- WALTON A. 1997. - Rodents, in KAY R. F., MADDEN R. H., CIFELLI R. L. & FLYNN J. J. (eds), Vertebrate Paleontology in the Neotropics, the Miocene Fauna of La Venta Colombia. Smithsonian Institution Press, Washington D. C.: 292 - 409.
- CROFT D. A., CHICK J. M. H. & ANAYA F. 2011 a. - New Middle Miocene Caviomorph Rodents from Quebrada Honda, Bolivia. Journal of Mammalian Evolution 18 (4): 245 - 268. https: // doi. org / 10.1007 / s 10914 - 011 - 9164 - z
- PEREZ M. E. & VUCETICH M. G. 2012. - A revision of the fossil genus Phanomys Ameghino, 1887 (Rodentia, Hystricognathi, Cavioidea) from the early Miocene of Patagonia (Argentina) and the acquisition of euhypsodonty in Cavioidea sensu stricto. Palaontologische Zeitschrift 86: 187 - 204. https: // doi. org / 10.1007 / S 12542 - 011 - 0120 - 2
- PEREZ M. E. 2010. - A new rodent (Cavioidea, Hystricognathi) from the middle Miocene of Patagonia, mandibular homologies, and the origin of the crown group Cavioidea sensu stricto. Journal of Vertebrate Paleontology 30 (6): 1848 - 1859. https: // doi. org / 10.1080 / 02724634.2010.522432