The Chasicoan (Spanish : Chasiquense or Spanish : Chasicoense ) age is a period of geologic time from 10–9 Ma within the Late Miocene epoch of the Neogene , used more specifically within the SALMA classification in South America. It follows the Mayoan and precedes the Huayquerian age.[ 1]
Etymology
The Chasicoan is named after the Arroyo Chasicó Formation of the Colorado Basin in northeastern Argentina.
Locations of Chasicoan formations
Fossil content
Group
Fossils
Formation
Notes
Mammals
Cardiatherium chasicoense Cardiomys leufuensis Chasicobradys intermedius Chasicostylus castroi Chasicotatus ameghinoi Epipeltephilus kanti Lagostomus telenkechanum Lycopsis viverensis Paedotherium minor Pisanodon nazari Protomegalonyx chasicoensis Pseudolycopsis cabrerai Vetelia perforata Kraglievichia sp. Orthomyctera sp. ?Parodimys sp. Proeuphractus sp. ?Tetrastylus sp. Typotheriopsis sp. Hegetotheriinae indet. , Hoplophorini indet. , Palaehoplophorini indet. , Plohophorini indet. , Proterotheriinae indet. Arroyo
Chasichimys bonaerense Chasicotatus ameghinoi Macrochorobates scalabrinii Cerro
Cardiatherium chasicoense Contrerascynus borhyaenoides Loma de
Notiomastodon sp. Madre de
Bolivartherium urumaquensis Bounodus enigmaticus Ischyrorhynchus cf. vanbenedeni Pseudoprepotherium urumaquensis Urumaquia robusta Gyrinodon sp. Neoepiblema sp. Potamarchus sp. Ribodon sp. Saurocetes sp. Urumaco
Birds
Psilopterus colzecus Arroyo
Leptoptilos patagonicus Puerto Madryn
Reptiles &
Carlesia cf. pendolai Anura indet. , Testudines indet. Arroyo
Bairdemys venezuelensis Caiman brevirostris C. wannlangstoni Charactosuchus mendesi Globidentosuchus brachyrostris Gryposuchus croizati G. jessei G. cf. pachakamue Hesperogavialis cruxenti Ikanogavialis gameroi Melanosuchus fisheri Mourasuchus arendsi Purussaurus mirandai Boinae indet. Urumaco
Fishes
Megalodon , Hemipristis serra Carcharhinus sp. Galeocerdo sp. Rhinoptera sp. Sphyrna sp. Caujarao
Ariidae indet. , Carcharhinidae indet. , Dasyatidae indet. , Hemigaleidae indet. , Heterodontidae indet. , Lamnidae indet. , Myliobatidae indet. , Odontaspididae indet. , Otodontidae indet. , Physeteroidea indet. , Rajidae indet. , Sciaenidae indet. , Sparidae indet. , Sphyrnidae indet. , Squatinidae indet. Paraná
Megalodon , Arius couma A. dowii A. herzbergii A. kessleri A. quadriscutis A. rugispinis Bagre marinus Carcharhinus caquetius Epinephelus itajara Galeocerdo cuvier Hemipristis serra Larimus henrii L. steurbautti Micropogonias coatesi Phractocephalus nassi Pristis pectinata Carcharhinus sp. Cynoscion sp. Dasyatis sp. Equetus sp. Haemulon sp. Nebris sp. Rhinoptera sp. Sphyrna sp. Urumaco
References
^ Chasicoan at Fossilworks .org^ a b Pérez, 2012, p.11
^ Le Roux et al., 2006, p.46
^ Quijano Ballesteros, 2005, p.19
^ Goin et al., 2000, p.101
^ Verzi et al., 2008, p.146
^ Le Roux et al., 2006, p.49
^ Deschamps et al., 2009, p.296
^ Romero et al., 1998, p.60
^ Marshall & Sempere, 1991, p.636
^ Finger et al., 2007, p.13
^ Noriega & Cladera, 2008, p.594
^ Martín Pérez, 2013, p.51
^ Antoine et al., 2016, p.56
^ Wesselingh et al., 2006, p.304
^ Brand et al., 2011
^ Linares, 2004, p.16
^ Pérez et al., 2018
^ Rasia & Candela, 2016
^ González Ruiz et al., 2012
^ Ribera del Arroyo Chasicó at Fossilworks .org^ Barrancas del Arroyo Chasicó at Fossilworks .org^ Las Barrancas at Fossilworks .org^ a b c Arroyo Chasicó at Fossilworks .org^ Cerro La Bota at Fossilworks .org^ Mones, 2014
^ Quebrada Ullum at Fossilworks .org^ Loma de Las Tapias Localidad Nº 4 at Fossilworks .org^ Aurinsa at Fossilworks .org^ a b c Urumaco Formation at Fossilworks .org^ Urumaco, Biozona 2 Loc 01-FU at Fossilworks .org^ Urumaco at Fossilworks .org^ Urumaco, Biozona 2 Loc 46-FU at Fossilworks .org^ Tío Gregorio - brown shales at Fossilworks .org^ a b Tío Gregorio at Fossilworks .org^ a b Northwest of San Rafael at Fossilworks .org^ Punta Buenos Aires at Fossilworks .org^ El Hatillo at Fossilworks .org^ Corralito Locality at Fossilworks .org^ Domo de Agua Blanca at Fossilworks .org^ Cerro Jose la Paz site, El Picache at Fossilworks .org^ Caujarao at Fossilworks .org^ Cantera del Puerto Viejo at Fossilworks .org^ Carrillo Briceño et al., 2015
Bibliography
Arroyo Chasicó Formation González Ruiz, Laureano R.; Scillato Yané, Gustavo J.; Krmpotic, Cecilia M.; Carlini, Alfredo A. (2012), "A new species of Peltephilidae (Mammalia: Xenarthra: Cingulata) from the late Miocene (Chasicoan SALMA) of Argentina" (PDF) , Zootaxa 3359 : 55– 64, retrieved 2019-02-15 Pérez, María Encarnación; Deschamps, Cecilia M.; Vucetich, María Guiomar (2018), "Diversity, phylogeny and biogeography of the South American 'cardiomyine' rodents (Hystricognathi, Cavioidea) with a description of two new species" , Papers in Palaeontology 4 (1): 1– 19, Bibcode :2018PPal....4....1P , doi :10.1002/spp2.1095 , hdl :11336/42361 , retrieved 2019-02-12 Rasia, Luciano L.; Candela, Adriana M. (2016), "Lagostomus telenkechanum , sp. nov., a new lagostomine rodent (Caviomorpha, Chinchillidae) from the Arroyo Chasicó Formation (late Miocene; Buenos Aires Province, Argentina)" , Journal of Vertebrate Paleontology 37 (1): e1239205, doi :10.1080/02724634.2017.1239205 , hdl :11336/72389 , retrieved 2019-02-12 Bahía Inglesa Formation Achurra, L.E.; Lacassie, J.P.; Le Roux, J.P.; Marquadt, C.; Belmar, M.; Ruiz Del Solar, J.; Ishman, S.E. (2009), "Manganese nodules in the Miocene Bahía Inglesa Formation, north-central Chile: Petrography, geochemistry, genesis and palaeoceanographic significance" (PDF) , Sedimentary Geology 217 (1– 4): 128– 139, Bibcode :2009SedG..217..128A , doi :10.1016/j.sedgeo.2009.03.016 , retrieved 2017-08-15 Achurra, L.; Marquadt, C.; Lacassie, J.P.; Le Roux, J.P. (2003), Nódulos de Mn de la Formación Bahía Inglesa: geoquímica, génesis e implicancias paleoambientales (PDF) , X Congreso Geológico Chileno, pp. 1– 10, archived from the original (PDF) on 2017-10-26, retrieved 2017-08-15 Acosta Hospitaleche, Carolina; Canto, Jhoann (2005), "Primer registro de cráneos asignados a Palaeospheniscus (Aves, Spheniscidae) procedentes de la Formación Bahía Inglesa (Mioceno Medio-Tardío), Chile" (PDF) , Revista Chilena de Historia Natural 78 : 489– 495, retrieved 2017-08-15 Benson, Richard D (2015), "A new species of penguin from the late Miocene of Chile, with comments on the stratigraphic range of Palaeospheniscus " (PDF) , Scientific Publications of the Science Museum of Minnesota 8 (4): 5– 22, retrieved 2019-02-13 Archived 2021-06-24 at the Wayback Machine Chávez Hoffmeister, Martín Felipe (2008), La ornitofauna de la Formación Bahía Inglesa, Caldera, Chile (MSc. thesis) (PDF) , Universidad Austral de Chile , pp. 1– 165, retrieved 2017-08-15 Chávez, Martín F (2007), "Sobre la presencia de Paraptenodytes y Palaeospheniscus (Aves: Sphenisciformes) en la Formación Bahía Inglesa, Chile" (PDF) , Revista Chilena de Historia Natural 80 (2): 255– 259, doi :10.4067/S0716-078X2007000200010 , retrieved 2017-08-15 Chávez, Martín (2007), "Spheniscus megaramphus Stucchi et al. 2003 (Aves: Sphenisciformes) en la Formación Bahía Inglesa, Chile" , Boletín de la Sociedad Geológica del Perú 102 : 101– 107, retrieved 2017-08-15 Le Roux, Jacobus P.; Achurra, Luciano; Henríquez, Álvaro; Carreño, Catalina; Rivera, Huber; Suárez, Mario E.; Ishman, Scott E.; Pyenson, Nicholas D. ; Gutstein, Carolina S. (2016), "Oroclinal bending of the Juan Fernández Ridge suggested by geohistory analysis of the Bahía Inglesa Formation, north-central Chile" (PDF) , Sedimentary Geology 333 : 32– 49, Bibcode :2016SedG..333...32L , doi :10.1016/j.sedgeo.2015.12.003 , retrieved 2017-08-15 Le Roux, Jacobus P.; Achurra, Luciano; Henríquez, Álvaro; Carreño, Catalina; Rivera, Huber (2015), Lithostratigraphy, depositional environments and tectonic setting of the Bahía Inglesa Formation west of Copiapó, north-central Chile (PDF) , XIV Congreso Geológico Chileno, pp. 821– 824, archived from the original (PDF) on 2017-10-26, retrieved 2017-08-15 Oyanadel Urbina, Pablo; Carrillo Briceño, Jorge; Villafaña, Jaime; Castelleto, Victor; Varas, Cristian; Alballay, Alex; Rivadeneira, Marcelo (2015), Nuevo registro de familias de peces óseos en Formación Bahía Inglesa (PDF) , XIV Congreso Geológico Chileno, pp. 1– 4, archived from the original (PDF) on 2017-10-26, retrieved 2017-08-15 Staig, Felipe; Hernández, Sebastián; López, Patricio; Villafaña, Jaime A.; Varas, Cristian; Soto, Luis Patricio; Carrillo Briceño, Jorge D. (2015), "Late Neogene Elasmobranch fauna from the Coquimbo Formation, Chile" , Revista Brasileira de Paleontologia 18 (2): 261– 272, doi :10.4072/rbp.2015.2.07 , retrieved 2017-08-15 Suárez, Mario E (2011), Línea de base paleontológica proyecto Puerto Santa Fe (PDF) , Comuna de Caldera Región de Atacama, pp. 1– 29, retrieved 2017-08-15 Valenzuela Toro, Ana; Gutstein, Carolina S., "Mamíferos marinos fósiles (excepto Cetacea) de Formación Bahía Inglesa: Registro, implicancias paleoambientales y perspectivas de estudio" (PDF) , . : 770– 772, archived from the original (PDF) on 2017-10-26, retrieved 2017-08-15 Caujarao Formation Cerro Azul Formation Goin, F.J.; Montalvo, C.; Visconti, G. (2000), "Los marsupiales (Mammalia) del Mioceno superior de la Formación Cerro Azul (Provincia de La Pampa, Argentina)" , Estudios Geológicos 56 (1– 2): 101– 126, doi :10.3989/egeol.00561-2158 , hdl :11336/108700 , retrieved 2017-08-15 Madozzo Jaén, M. Carolina; Pérez, M. Encarnación; Montalvo, Claudia I.; Tomassini, Rodrigo L. (2018), "Systematic review of Neocavia from the Neogene of Argentina: Phylogenetic and evolutionary implications" (PDF) , Acta Palaeontologica Polonica 63 (2): 241– 260, retrieved 2019-02-11 Sostillo, Renata; Montalvo, Claudia I.; Verzi, Diego H. (2014), "A new species of Reigechimys (Rodentia, Echimyidae) from the Late Miocene of central Argentina and the evolutionary pattern of the lineage" , Ameghiniana 51 (4): 284– 294, doi :10.5710/AMGH.24.04.2014.2741 , retrieved 2019-02-12 Coquimbo Formation Le Roux, J.P.; Olivares, Danisa M.; Nielsen, Sven N.; Smith, Norman D.; Middleton, Heather; Fenner, Juliane; Ishman, Scott E. (2006), "Bay sedimentation as controlled by regional crustal behaviour, local tectonics and eustatic sea-level changes: Coquimbo Formation (Miocene–Pliocene), Bay of Tongoy, central Chile" (PDF) , Sedimentary Geology 184 (1– 2): 133– 153, Bibcode :2006SedG..184..133L , doi :10.1016/j.sedgeo.2005.09.023 , retrieved 2018-05-20 Loma de Las Tapias Formation Deschamps, Cecilia M.; Vieytes, Emma C.; Olivares, A. Itatí; Vucetich, María G. (2009), "Primer registro de Cardiatherium chasicoense (Rodentia, Hydrochoeridae) fuera del área pampeana (Argentina) y su valor bioestratigráfico" , Ameghiniana 46 : 295– 305, retrieved 2018-09-10 Mones, Álvaro (2014), "Contrerascynus , new name for Simpsonia Contreras, 1990 (Mammalia, Sparassodonta, Hathlyacynidae), non Rochebrune, 1904 (Bivalvia, Unionidae), non Baker, 1911 (Gastropoda, Lymnaeidae)" (PDF) , Revista Brasileira de Paleontologia 17 (3): 435– 436, doi :10.4072/rbp.2014.3.12 , retrieved 2019-02-12 Olivares, A. Itatí; Verzi, Diego H.; Contreras, Victor H.; Pessôa, Leila (2016), "A new Echimyidae (Rodentia, Hystricomorpha) from the late Miocene of southern South America" , Journal of Vertebrate Paleontology 37 (1): e1239204, doi :10.1080/02724634.2017.1239204 , hdl :11336/56402 , retrieved 2019-02-12 Madre de Dios Formation Frailey, Carl David; Campbell, Kenneth E. Jr. (2012), "Two New Genera of Peccaries (Mammalia, Artiodactyla, Tayassuidae) from Upper Miocene Deposits of the Amazon Basin" , Journal of Paleontology 86 (5): 852– 877, Bibcode :2012JPal...86..852F , doi :10.1666/12-012.1 , retrieved 2019-02-15 Prothero, Donald R. ; Campbell, Kenneth E. Jr.; Beatty, Brian L.; Frailey, Carl D. (2014), "New late Miocene dromomerycine artiodactyl from the Amazon Basin: implications for interchange dynamics" , Journal of Paleontology 88 (3): 434– 443, doi :10.1666/13-022 , retrieved 2019-02-12 Romero P., Lidia; Morales R., María del Carmen; Carpio R, Mario (1998), Geología de los cuadrángulos de Río Acre 22-v, Iñapari 22-x, Qda. Mala 23-v, Iberia 23-x, San Lorenzo 23-y, Puerto Lidia 24-v, Río Manuripe 24-x, Mavila 24-y, Santa María 24-z, Valencia 25-z, Palma Real 26-z y Río Heath 27-z (PDF) , INGEMMET , pp. 1– 201, retrieved 2019-02-12 Mauri Formation Navidad Formation Finger, Kenneth L.; Nielsen, Sven N.; DeVries, Thomas J.; Encinas, Alfonso; Peterson, Dawn E. (2007), "Paleontologic evidence for sedimentary displacement in Neogene forearc basins of central Chile" (PDF) , PALAIOS 22 (1): 3– 16, Bibcode :2007Palai..22....3F , doi :10.2110/palo.2005.p05-081r , retrieved 2017-08-15 Palo Pintado Formation Anzótegui, Luisa M.; Horn, Maricel Yarina (2011), "Megaflora de la Formación Palo Pintado (Mioceno Superior) Salta, Argentina Parte II" (PDF) , Revista Brasileira de Paleontologia 14 (3): 239– 254, doi :10.4072/rbp.2011.3.04 , retrieved 2017-10-22 Galli, Claudia Inés; Anzótegui, Luisa Matilde; Horn, Maricel Yanina; Morton, Lourdes Susana (2011), "Paleoambiente y paleocomunidades de la Formación Palo Pintado (Mioceno-Plioceno), Provincia de Salta, Argentina" (PDF) , Revista Mexicana de Ciencias Geológicas 28 : 161– 174, retrieved 2017-10-22 Reguero, Marcelo A.; Candela, Adriana M.; Galli, Claudia I.; Bonini, Ricardo; Voglino, Damián (2015), "A new Hypsodont Notoungulate (Hegetotheriidae, Pachyrukhinae) from the late Miocene of the Eastern Cordillera, Salta province, Northwest of Argentina" (PDF) , Andean Geology 42 : 56– 70, doi :10.5027/andgeoV42n1-a04 , retrieved 2017-08-15 Paraná Formation Cione, Alberto Luis; Cabrera, Daniel Alfredo; Barla, María Julia (2012), "Oldest record of the Great White Shark (Lamnidae, Carcharodon; Miocene) in the Southern Atlantic" (PDF) , Geobios 45 (2): 167– 172, Bibcode :2012Geobi..45..167C , doi :10.1016/j.geobios.2011.06.002 , hdl :11336/139163 , retrieved 2017-10-22 [permanent dead link ] Martín Pérez, Leandro (2013), Sistemática, tafonomía y paleoecología de los invertebrados de la Formación Paraná (Mioceno), Provincia de Entre Ríos, Argentina (PhD thesis) (PDF) , Universidad Nacional de La Plata , pp. 1– 398, retrieved 2017-08-15 Pebas Formation Antoine, Pierre-Olivier; Abello, M. Alejandra; Adnet, Sylvain; Altamirano Sierra, Ali J.; Baby, Patrice; Billet, Guillaume; Boivin, Myriam; Calderón, Ysabel; Candela, Jules Chabain, Fernando Corfu, Darin A. Croft, Morgan Ganerød, Carlos Jaramillo , Sebastian Klaus, Laurent Marivaux, Rosa E. Navarrete, Maëva J. Orliac, Francisco Parra, María Encarnación Pérez, François Pujos, Jean-Claude Rage, Anthony Ravel, Céline Robinet, Martin Roddaz, Julia Victoria Tejada Lara, Jorge Vélez Juarbe, Frank P. Wesselingh, Rodolfo Salas Gismondi, Adriana (2016), "A 60-million-year Cenozoic history of western Amazonian ecosystems in Contamana, eastern Peru" , Gondwana Research 31 : 30– 59, Bibcode :2016GondR..31...30A , doi :10.1016/j.gr.2015.11.001 , hdl :11336/99030 , retrieved 2017-08-15 {{citation }}: CS1 maint: multiple names: authors list (link )Wesselingh, F.P.; Hoorn, M.C.; Guerrero, J.; Räsänen, M.E.; Romero Pittmann, L.; Salo, J. (2006), "The stratigraphy and regional structure of Miocene deposits in western Amazonia (Peru, Colombia and Brazil), with implications for late Neogene landscape evolution" , Scripta Geologica 133 : 291– 322, retrieved 2017-08-15 Pisco Formation Altamirano Sierra, Alí J (2013), "Primer registro de pelicano (Aves: Pelecanidae) para el Mioceno tardio de la formacion Pisco, Peru" (PDF) , Bulletin de l'Institut français d'études andines , 42 : 1– 12, retrieved 2017-09-04 Báez Gómez, Diego A (2006), "Estudio paleoambiental de la formación Pisco:: Localidad Ocucaje" (PDF) , Revista del Instituto de Investigaciones FIGMMG , 9 : 64– 69, retrieved 2017-09-04 Bianucci, Giovanni; Di Celma, Claudio; Urbina, Mario; Lambert, Olivier (2016), "New beaked whales from the late Miocene of Peru and evidence for convergent evolution in stem and crown Ziphiidae (Cetacea, Odontoceti)" (PDF) , PeerJ 4 : e2479, doi :10.7717/peerj.2479 PMC 5036081 PMID 27688973 , retrieved 2019-02-12 Brand, Leonard; Urbina, Mario; Chadwick, Arthur; DeVries, Thomas J.; Esperante, Raul (2011), "A high resolution stratigraphic framework for the remarkable fossil cetacean assemblage of the Miocene/Pliocene Pisco Formation, Peru", Journal of South American Earth Sciences 31 (4): 414– 425, Bibcode :2011JSAES..31..414B , doi :10.1016/j.jsames.2011.02.015 Collareta, Alberto; Lambert, Olivier; De Muizon, Christian; Urbina, Mario; Bianucci, Giovanni (2017), "Koristocetus pescei gen. et sp. nov., a diminutive sperm whale (Cetacea: Odontoceti: Kogiidae) from the late Miocene of Peru" , Fossil Record 20 (2): 259– 278, Bibcode :2017FossR..20..259C , doi :10.5194/fr-20-259-2017 hdl :11568/891486 , retrieved 2019-02-12 Lambert, Olivier; Bianucci, Giovanni; Urbina, Mario; Geisler, Jonathan H. (2017), "A new inioid (Cetacea, Odontoceti, Delphinida) from the Miocene of Peru and the origin of modern dolphin and porpoise families", Zoological Journal of the Linnean Society 179 (4): 919– 946 Marx, Felix G.; Lambert, Olivier; De Muizon, Christian (2017), "A new Miocene baleen whale from Peru deciphers the dawn of cetotheriids" , Royal Society Open Science 4 (9): 170560, Bibcode :2017RSOS....470560M , doi :10.1098/rsos.170560 , PMC 5627101 PMID 28989761 , retrieved 2019-02-12 Marx, Felix G.; Kohno, Naoki (2016), "A new Miocene baleen whale from the Peruvian desert" , Royal Society Open Science 3 (10): 160542, Bibcode :2016RSOS....360542M , doi :10.1098/rsos.160542 , PMC 5098998 PMID 27853573 , retrieved 2019-02-12 Poma Porras, Orlando; Horna Santillán, Edgard; Esperante, Raúl (2009), "Baleen Fósil (Cetacea: mysticeti) en Sedimentos de la Cuenca Marina del Neógeno en la Formación Pisco, al Sur del Perú" (PDF) , Revista de Investigación Universitaria , 1 : 84– 97, retrieved 2017-09-04 Archived 2017-09-05 at the Wayback Machine Ramassamy, Benjamin; Lambert, Olivier; Collareta, Alberto; Urbina, Mario; Bianucci, Giovanni (2018), "Description of the skeleton of the fossil beaked whale Messapicetus gregarius : searching potential proxies for deep-diving abilities" (PDF) , Fossil Record 21 (1): 11– 32, Bibcode :2018FossR..21...11R , doi :10.5194/fr-21-11-2018 , retrieved 2019-02-11 Solís Mundaca, Flavio Alejandro (2018), Bioestratigrafía e implicancias paleoceanográficas de las diatomeas de la sección Cerro Caucato, Formación Pisco, Ica, Peru (MSc. thesis) (PDF) , Universidad Peruana Cayetano Heredia , pp. 1– 158, retrieved 2018-09-10 Stucchi, Marcelo; Emslie, Steven D.; Varas Malca, Rafael M.; Urbina Schmitt, Mario (2015a), "A new late Miocene condor (Aves, Cathartidae) from Peru and the origin of South American condors" , Journal of Vertebrate Paleontology 35 (5): e972507, Bibcode :2015JVPal..35E2507S , doi :10.1080/02724634.2015.972507 , retrieved 2019-02-13 Stucchi, Marcelo; Varas Malca, Rafael M.; Urbina Schmitt, Mario (2015b), "New Miocene sulid birds from Peru and considerations on their Neogene fossil record in the Eastern Pacific Ocean" (PDF) , Acta Palaeontologica Polonica 61 (2): 417– 427, retrieved 2019-02-13 Stucchi, M (2007), "Los pingüinos de la Formación Pisco (Neógeno), Perú" (PDF) , 4th European Meeting on the Palaeontology and Stratigraphy of Latin America, Cuadernos del Museo Geominero , 8 : 367– 373, retrieved 2017-09-04 Puerto Madryn Formation Urumaco Formation Carrillo Briceño, Jorge D.; Maxwell, Erin; Aguilera, Órangel A.; Sánchez, Rodolfo; Sánchez Villagra, Marcelo R. (2015), "Sawfishes and Other Elasmobranch Assemblages from the Mio-Pliocene of the South Caribbean (Urumaco Sequence, Northwestern Venezuela)", PLoS ONE 10 (10): e0139230, Bibcode :2015PLoSO..1039230C , doi :10.1371/journal.pone.0139230 Linares, Omar J (2004), "Bioestratigrafía de la fauna de mamíferos de las formaciones Socorro, Urumaco y Codore (Mioceno Medio-Plioceno Temprano) de la región de Urumaco, Falcón, Venezuela" (PDF) , Paleobiología Neotropical , 1 : 1– 26, retrieved 2017-08-15 Quijano Ballesteros, Jhon Richard (2005), Estudio magnetoestratigráfico en la sección de El Mamón (miembro medio de la Formación Urumaco, Estado Falcón) (MSc. thesis) (PDF) , Universidad Simón Bolívar , pp. 1– 92, retrieved 2017-10-27 Archived 2018-04-09 at the Wayback Machine Rincón, Ascanio D.; Solórzano, Andrés; McDonald, H. Gregory; Montellano Ballesteros, Marisol (2018), "Two new megalonychid sloths (Mammalia: Xenarthra) from the Urumaco Formation (late Miocene), and their phylogenetic affinities" , Journal of Systematic Palaeontology 17 (5): 409– 421, doi :10.1080/14772019.2018.1427639 , retrieved 2019-02-11 Rincón, Ascanio D.; McDonald, H. Gregory; Solórzano, Andrés; Núñez Flores, Mónica; Ruiz Ramoni, Damián (2015), "A new enigmatic Late Miocene mylodontoid sloth from northern South America" , Royal Society Open Science 2 (2): 140256, Bibcode :2015RSOS....240256R , doi :10.1098/rsos.140256 , PMC 4448802 PMID 26064594 , retrieved 2019-02-13
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