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Cerro del Pueblo Formation

Coordinates:26°06′N101°06′W / 26.1°N 101.1°W /26.1; -101.1
From Wikipedia, the free encyclopedia
Geological formation in Mexico
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Cerro del Pueblo Formation
Stratigraphic range:Campanian
~73.6–72.7 Ma
TypeGeological formation
Unit ofDifunta Group
UnderliesCerro Huerta Formation
OverliesParras Shale
Thickness160 m (520 ft)
Lithology
PrimaryMudstone,sandstone
OtherSiltstone,conglomerate,limestone
Location
Coordinates26°06′N101°06′W / 26.1°N 101.1°W /26.1; -101.1
Approximate paleocoordinates32°12′N75°30′W / 32.2°N 75.5°W /32.2; -75.5
RegionCoahuila
Country Mexico
ExtentParras Basin
Cerro del Pueblo Formation is located in Mexico
Cerro del Pueblo Formation
Cerro del Pueblo Formation (Mexico)
Show map of Mexico
Cerro del Pueblo Formation is located in Coahuila
Cerro del Pueblo Formation
Cerro del Pueblo Formation (Coahuila)
Show map of Coahuila
Paleogeography of the Campanian
Outcrops of the Cerro del Pueblo Formation at the type locality of Cerro del Pueblo, on the edge of Saltillo, Coahuila

TheCerro del Pueblo Formation is a geologicalformation inCoahuila,Mexico, whose strata date back to the latest Campanian of theLate Cretaceous, just before the Campanian-Maastrichtian boundary. Dinosaur remains are among the fossils that have been recovered from the formation.[1] The formation is believed to correlate with theBaculites reesidesi andBaculites jenseni ammonite zones, which dates it to 73.63-72.74 Ma.[2]

Fragments of a hadrosaur skeleton weathering out of the Cerro del Pueblo Formation near Rincon Colorado, Coahuila

The Cerro del Pueblo Formation includes marine, brackish, and non-marine environments, and was laid down in a coastal lowland environment, with Coahuila being on the edge of theWestern Interior Seaway at the time. Fossils are abundant in the Cerro del Pueblo Formation, and include dinosaurs and other vertebrates, plants and seeds, and invertebrates including oysters, snails, and other molluscs. The formation is underlain by theParras Shale and is overlain by theCerro Huerta Formation.

Dinosaurs

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Ornithischians

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Remains of the following ornithischians have been found in the formation:[3]

Ankylosaurs

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Ankylosaurs of the Cerro del Pueblo Formation
GenusSpeciesMaterialNotesImages
Ankylosauria[3]Indeterminate[3]A femur fragment, phalanx and a possible osteoderm.[3]Indeterminateankylosaur remains.[3]
Ankylosauridae[3]Indeterminate[3]Osteoderms.[3]Indeterminateankylosaurid remains.[3]
Nodosauridae[3]Indeterminate[3]A caudal vertebra, osteoderms and a tooth.[3]Indeterminatenodosaurid remains.[3]

Ceratopsians

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Ceratopsians of the Cerro del Pueblo Formation
GenusSpeciesMaterialNotesImages
Centrosaurinae[3]Indeterminate[3]A partial right squamosal.[3]Probably represents a new taxon.[3]
Ceratopsidae[3]Indeterminate[3]Squamosal fragment, metatarsal, metacarpal, sacral vertebrae, proximal end of femora, proximal end of ulna, possible frill fragments and teeth.[3]Indeterminateceratopsid remains.[3]
Chasmosaurinae[3]Indeterminate[3]Supraorbital horncores, an orbit, dorsal vertebra, indeterminate cranial fragments, limb bones, and unspecified postcranial elements pertaining to juvenile specimens.[3]Indeterminatechasmosaurine remains belonging to juvenile specimens.[3]

Ornithopods

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Ornithopods of the Cerro del Pueblo Formation
GenusSpeciesMaterialNotesImages
Coahuilasaurus[4]C. lipani[3]Akritosaurinhadrosaurid
Coahuilasaurus
Latirhinus
Tlatolophus
Velafrons
Hadrosauridae[3]Indeterminate[3]A braincase, postorbital, quadrate, laterosphenoid, dentaries, mandibles, maxillae, cervical vertebrae, dorsal vertebrae, sacral vertebrae, caudal vertebrae, neural spines, ribs, ilium, femora, fibulae, tibiae, humeri, ulnae, metatarsals, metacarpals, pedal phalanxes, pedal phalanges, pedal ungula, phalanges, phalanxes, various bone fragments, fibulae, scapulae, radii, coracoids, astragali, indeterminate pelvic bones, ossified tendons, isolated teeth and integumentary impressions.[3]Indeterminatehadrosaurid remains from numerous specimens.[3]
Kritosaurus[5]K. navajovius[5]Predentary, symphyseal processes, rostral portion of dental battery of dentaries, rostral region of premaxillae, and fragments of maxilla.[5]Akritosaurinhadrosaurid, originally referred toK. navajovius,[5] but reclassified toCoahuilasaurus.
Lambeosaurinae[3]Indeterminate[3]Maxillae, premaxillae, quadrate, partial braincase, dentaries, cervical vertebrae, dorsal vertebrae, sacral vertebrae, caudal vertebrae, neural spines, ribs, ilia, ischium, femora, fibulae, tibiae, humeri, ulnae, metatarsals, metacarpals, pedal phalanges, phalanges, pedal unguals, astragali, radii, scapulae, pubes and other unprepared elements.[3]Indeterminatelambeosaurine remains from numerous specimens, including a large hadrosaurid.[3]
Latirhinus[6]L. uitstlani[6]Caudal vertebrae, scapulae, humeri, ulnae, coracoid, metacarpals, manual ungual, ilia, ischia, femora, tibiae, fibula, and astragalus.[6]Holotype specimen is chimeric as it consists of multiple individuals. Some material from the holotype specimen is assigned toLambeosaurinae indet. andSaurolophinae indet..[7]
Saurolophinae[3]Indeterminate[3]A braincase, brain endocast, dentaries, maxillae, cervical vertebrae, dorsal vertebrae, sacral vertebrae, caudal vertebrae, chevrons, neural spines, ribs, ilium fragments, femora, fibulae, tibiae, humeri, ulnae, metatarsals, phalanges, phalanxes, scapulae, a possible coracoid, radii, ossified tendons, and undescribed juvenile specimens.[3]Indeterminatesaurolophine remains from numerous specimens, including juvenile individuals.[3]
Tlatolophus[8]T. galorum[8]An almost complete skull, mandible, partial ilium, partial ischium, a femur, scapula, coracoid, sacral vertebrae, caudal vertebrae, and chevrons.[8]Aparasaurolophinhadrosaur, closely related toCharonosaurus andBlasisaurus.[8]
Velafrons[9]V. coahuilensis[9]Dentaries, predentaries, ceratobranchial, premaxillae, maxillae, jugal, quadrate, nasal, skull roof, cervical vertebrae, dorsal vertebrae, sacral vertebrae, caudal vertebrae, neural arches, cervical ribs, ribs, chevrons, scapula, coracoids, humeri, ulnae, radii, metacarpals, manual phalanges, ilium, ischia, pubes, femora, tibiae, astragalus, metatarsals and pedal phalanges.[9]Alambeosaurinehadrosaurid known only from a juvenile specimen.[9]

Thescelosaurids

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Thescelosaurids of the Cerro del Pueblo Formation
GenusSpeciesMaterialNotesImages
Thescelosauridae[10]Indeterminate[10]A right premaxillary tooth and a posterior sacral vertebral centrum.[10]Indeterminatethescelosaurid remains.[10]

Saurischians

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Remains of the following saurischians have been found in the formation:[3]

Theropods

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Coelurosaurs
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Coelurosaurs of the Cerro del Pueblo Formation
GenusSpeciesMaterialNotesImages
cf.Richardoestesia[3]Indeterminate[3]A tooth.[3]A taxon only known from teeth.[3]
Dromaeosaurs
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Dromaeosaurs of the Cerro del Pueblo Formation
GenusSpeciesMaterialNotesImages
Dromaeosaurinae[3]Indeterminate[3]A pedal ungual and dentary teeth.[3]Indeterminatedromaeosaurine remains.[3]
Saurornitholestinae[3]Indeterminate[3]A pedal ungual, manual unguals and teeth.[3]Indeterminatesaurornitholestine remains.[3]
Oviraptorosaurs
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Oviraptorosaurs of the Cerro del Pueblo Formation
GenusSpeciesMaterialNotesImages
Caenagnathidae3 tibia fragments, distal, proximal and medial shaft elements respectively.[11]Anoviraptorosaur. Two different morphotypes are suggested, a small one, less than a meter in length. And a big morphotype, almost reaching two meters.
Ornithomimosaurs
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Ornithomimosaurs of the Cerro del Pueblo Formation
GenusSpeciesMaterialNotesImages
Mexidracon[12]M. longimanus[3]A partial skeletonAornithomimidtheropod
Paraxenisaurus[13]P. normalensis[13]Caudal vertebrae, femur, peses, manual phalanxes, manual ungual, tarsals, metatarsals, metacarpals, pedal phalanx, pedal phalanges, and pedal unguals.[13]Represents the first knowndeinocheirid from North America.[13]
"Saltillomimus""S. rapidus"Partial skeleton.[14]An informally namedornithomimosaur.[14]
Tyrannosaurs
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Tyrannosaurs of the Cerro del Pueblo Formation
GenusSpeciesMaterialNotesImages
Labocania[15]L. aguillonae[3]Ateratophonein tyrannosaurine
Tyrannosauridae[3]Indeterminate[3]A caudal vertebra, indeterminate vertebrae, tibia, fibula, fragments of ungual phalanges, phalanges, and teeth.[3]Indeterminatetyrannosaurid remains.[3]
Other theropods
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Theropods of the Cerro del Pueblo Formation
GenusSpeciesMaterialNotesImages
Theropoda[3]Indeterminate[3]A neural arch, complete and fragmented pedal and manual phalanxes, manual unguals, unspecified vertebra, complete and fragmented caudal vertebrae, chevron, proximal end of femur, and unidentified bone fragments.[3]Indeterminatetheropod remains.[3]
Troodontidae[3]Indeterminate[3]A pedal phalanx and a tooth.[3]Indeterminatetroodontid remains.[3]

Other Fossils

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Pterosaurs

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Pterosaurs of the Cerro del Pueblo Formation
TaxaPresenceDescriptionImages
Ichnogenus:Saltillo, Coahuila[16]Specimens kept at the Dinosaur Tracks Museum, of the University of Colorado at Denver and the Secretaría de Educación Pública de Coahuila, Mexico;[16] might also representHaenamichnus.[17]

Turtles

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Turtles of the Cerro del Pueblo Formation
GenusSpeciesMaterialNotesImages
Mexichelys[18]M. coahuilaensisNew genus forEuclastes coahuilaensis, seaturtle
Chedighaii[19]C. hutchisoniAbothremydid turtle
Yelmochelys[20]Y. rosarioaeAstem-kinosternid turtle
Color key
TaxonReclassified taxonTaxon falsely reported as presentDubious taxon or junior synonymIchnotaxonOotaxonMorphotaxon
Notes
Uncertain or tentative taxa are insmall text;crossed out taxa are discredited.

Other vertebrates

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Fish

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Fish of the Cerro del Pueblo Formation
GenusSpeciesMaterialNotesImages
LepisosteusL. sp.
AmiidaeIndet.

Fossil eggs

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Mammals

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Mammals of the Cerro del Pueblo Formation
GenusSpeciesMaterialNotesImages
Cimolomyidae indet.A cimolomyidmultituberculate.[14]
PediomysP. cf.elegansApediomyidtribosphenidan.[14]
Taeniolabidoidae indet.A taeniolabidoid multituberculate.[14]
TurgidodonT. cf.russelliAnalphadontidmarsupialiform.[14]

See also

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References

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  1. ^Weishampel et al., 2004, pp.574-588
  2. ^Fowler, Denver Warwick (2017-11-22)."Revised geochronology, correlation, and dinosaur stratigraphic ranges of the Santonian-Maastrichtian (Late Cretaceous) formations of the Western Interior of North America".PLOS ONE.12 (11): e0188426.Bibcode:2017PLoSO..1288426F.doi:10.1371/journal.pone.0188426.ISSN 1932-6203.PMC 5699823.PMID 29166406.
  3. ^abcdefghijklmnopqrstuvwxyzaaabacadaeafagahaiajakalamanaoapaqarasatauavawaxayazbabbbcbdbebfbgbhbibjbkblbmRamírez-Velasco, A. A.; Hernández-Rivera, R. (2015)."Diversity of late cretaceous dinosaurs from Mexico"(PDF).Boletín Geológico y Minero.126 (1):63–108.
  4. ^Longrich, N.R.; Ramirez Velasco, A.A.; Kirkland, J.; Bermúdez Torres, A.E.; Serrano-Brañas, C.I. (2024)."Coahuilasaurus lipani, a New Kritosaurin Hadrosaurid from the Upper Campanian Cerro Del Pueblo Formation, Northern Mexico".Diversity.16 (9): 531.doi:10.3390/d16090531.
  5. ^abcdPrieto-Márquez, A. (2013). "Skeletal morphology ofKritosaurus navajovius (Dinosauria:Hadrosauridae) from the Late Cretaceous of the North American south-west, with an evaluation of the phylogenetic systematics and biogeography of Kritosaurini".Journal of Systematic Palaeontology.12 (2):133–175.Bibcode:2014JSPal..12..133P.doi:10.1080/14772019.2013.770417.S2CID 84942579.
  6. ^abcPrieto-Márquez, Albert; Serrano Brañas, Claudia Inés (2012). "Latirhinus uitstlani, a 'broad-nosed' saurolophine hadrosaurid (Dinosauria, Ornithopoda) from the late Campanian (Cretaceous) of northern Mexico".Historical Biology.24 (6):607–619.Bibcode:2012HBio...24..607P.doi:10.1080/08912963.2012.671311.S2CID 128964878.
  7. ^Ángel Alejandro Ramírez-Velascoa; Jesús Alvarado-Ortegab (2021)."Review of the taxonomic affinities of Latirhinus uitstlani, an emblematic Mexican hadrosaurid".Journal of South American Earth Sciences.110.Bibcode:2021JSAES.11003391R.doi:10.1016/j.jsames.2021.103391.
  8. ^abcdRamírez-Velasco, Á. A.; Aguilar, F. J.; Hernández-Rivera, R.; Gudiño Maussán, J. L.; Rodriguez, M. L.; Alvarado-Ortega, J. (2021). "Tlatolophus galorum, gen. et sp. nov., a parasaurolophini dinosaur from the upper Campanian of the Cerro del Pueblo Formation, Coahuila, northern Mexico".Cretaceous Research.126: Article 104884.Bibcode:2021CrRes.12604884R.doi:10.1016/j.cretres.2021.104884.
  9. ^abcdGates, Terry A.; Sampson, Scott D.; Delgado de Jesús, Carlos R.; Zanno, Lindsay E.; Eberth, David; Hernandez-Rivera, René; Aguillón Martínez, Martha C.; Kirkland, James I. (2007). "Velafrons coahuilensis, a new lambeosaurine hadrosaurid (Dinosauria: Ornithopoda) from the Late Campanian Cerro del Pueblo Formation, Coahuila, Mexico".Journal of Vertebrate Paleontology.27 (4):917–930.doi:10.1671/0272-4634(2007)27[917:VCANLH]2.0.CO;2.S2CID 86157621.
  10. ^abcdRivera-Sylva, Héctor E.; Frey, Eberhard; Stinnesbeck, Wolfgang; Amezcua, Natalia; Flores, Flores Huert (2018)."First occurrence of Parksosauridae in Mexico, from the Cerro del Pueblo Formation (Late Cretaceous; late Campanian) at Las Águilas, Coahuila".Boletín de la Sociedad Geológica Mexicana.70 (3):779–784.doi:10.18268/BSGM2018v70n3a10.S2CID 202193814.
  11. ^Serrano-Brañas, Claudia Inés; Espinosa-Chávez, Belinda; Maccracken, S. Augusta; Guevara, Daniela Barrera; Torres-Rodríguez, Esperanza (2022-09-30)."First record of caenagnathid dinosaurs (Theropoda, Oviraptorosauria) from the Cerro del Pueblo Formation (Campanian, Upper Cretaceous), Coahuila, Mexico".Journal of South American Earth Sciences.119: 104046.Bibcode:2022JSAES.11904046S.doi:10.1016/j.jsames.2022.104046.ISSN 0895-9811.
  12. ^Serrano-Brañas, Claudia Inés; Espinosa-Chávez, Belinda; de León-Dávila, Claudio; Maccracken, S. Augusta; Barrera-Guevara, Daniela; Torres-Rodríguez, Esperanza; Prieto-Márquez, Albert (2025-01-28)."A long-handed new ornithomimid dinosaur from the Campanian (Upper Cretaceous) Cerro del Pueblo Formation, Coahuila, Mexico".Cretaceous Research: 106087.doi:10.1016/j.cretres.2025.106087.ISSN 0195-6671.
  13. ^abcdSerrano-Brañas, Claudia Inés; Espinosa-Chávez, Belinda; Maccracken, S. Augusta; Gutiérrez-Blando, Cirene; de León-Dávila, Claudio; Ventura, José Flores (April 2020). "Paraxenisaurus normalensis, a large deinocheirid ornithomimosaur from the Cerro del Pueblo Formation (Upper Cretaceous), Coahuila, Mexico".Journal of South American Earth Sciences.101: 102610.Bibcode:2020JSAES.10102610S.doi:10.1016/j.jsames.2020.102610.S2CID 218968100.
  14. ^abcdef"Fossil vertebrates from the Cerro del Pueblo Formation, Coahuila, Mexico, and the distribution of Late Campanian (Cretaceous) terrestrial vertebrate faunas - ProQuest".www.proquest.com. Retrieved2024-11-18.
  15. ^Rivera-Sylva, Héctor E.; Longrich, Nicholas R. (2024)."A New Tyrant Dinosaur from the Late Campanian of Mexico Reveals a Tribe of Southern Tyrannosaurs".Fossil Studies.2 (4):245–272.doi:10.3390/fossils2040012.
  16. ^abcLockley, M.; Harris, J.D.; and Mitchell, L. 2008. "A global overview of pterosaur ichnology: tracksite distribution in space and time."Zitteliana. B28. p. 187-198.ISSN 1612-4138.
  17. ^Witton, Mark P.; Naish, Darren; McClain, Craig R. (28 May 2008)."A Reappraisal of Azhdarchid Pterosaur Functional Morphology and Paleoecology".PLOS ONE.3 (5): e2271.Bibcode:2008PLoSO...3.2271W.doi:10.1371/journal.pone.0002271.PMC 2386974.PMID 18509539.
  18. ^James F. Parham;Nicholas D. Pyenson (2010). "New Sea Turtle from the Miocene of Peru and the Iterative Evolution of Feeding Ecomorphologies since the Cretaceous".Journal of Paleontology.84 (2):231–247.Bibcode:2010JPal...84..231P.doi:10.1666/09-077R.1.S2CID 62811400.
  19. ^Gaffney, Eugene S.; Tong, Haiyan; Meylan, Peter A. (Peter Andre) (2006)."Evolution of the side-necked turtles : the families Bothremydidae, Euraxemydidae, and Araripemydidae; Bulletin of the American Museum of Natural History, no. 300".American Museum of Natural History.
  20. ^Don Brinkman; Martha Carolina Aguillon-Martinez; J. Howard Hutchison; Caleb M. Brown (2016)."Yelmochelys rosarioae gen. et sp. nov., a stem kinosternid (Testudines; Kinosternidae) from the Late Cretaceous of Coahuila, Mexico".PaleoBios.33:1–20.

Bibliography

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Further reading

[edit]
  • J. L. Gudiño Maussán, F. J. Aguilar, and R. Hernández-Rivera. 2018. Aplicación de fotogrametría digital para el registro de las huellas de dinosaurio de la Formación Cerro del Pueblo (Campaniano tardío), Coahuila, México [Application of digital photogrammetry for recording dinosaur footprints of the Cerro del Pueblo Formation (late Campanian), Coahuila, Mexico]. Boletín de la Sociedad Geológica Mexicana 70(2):307-324
  • D. Brinkman, M. C. Aguillon-Martinez, J. H. Hutchison and C. M. Brown. 2016. Yelmochelys rosarioae gen. et sp. nov., a stem kinosternid (Testudines; Kinosternidae) from the Late Cretaceous of Coahuila, Mexico. PaleoBios 33(30601):1-20
  • A. A. Ramírez-Velasco, R. Hernández-Rivera, and R. Servin-Pichardo. 2014. The hadrosaurian record from Mexico. In D. A. Eberth & D. C. Evans (ed.), Hadrosaurs 340-360
  • D. Brinkman, M. C. Aquillon-Martinez, C. A. De Leon Dávila, H. Jamniczky, D. A. Eberth and M. Colbert. 2009. Euclastes coahuilaensis sp. nov., a basal cheloniid turtle from the late Campanian Cerro del Pueblo Formation of Coahuila State, Mexico. PaleoBios 28(3):76-88
  • H. E. Rivera-Sylva and B. Espinosa-Chávez. 2006. Ankylosaurid (Dinosauria: Thyreophora) osteoderms from the Upper Cretaceous Cerro de Pueblo Formation of Coahuila, Mexico. Carnets de Géologie/Notebooks on Geology Letter(2006/02):1-5
  • M. Aguillon-Martinez, D. Zelenitsky, D. B. Brinkman and D. A. Eberth. 2004. Eggshell fragments from the uppermost Cerro del Pueblo Formation (Upper Cretaceous; Mexico). Journal of Vertebrate Paleontology 24(3, suppl.):33A
  • D. Eberth, S. D. Sampson, R. A. Rodriguez-De La Rosa, M. Aguillon-Martinez, D. B. Brinkman and J. Lopez-Espinoza. 2003. Las Aguilas: an unusually rich Campanian-age vertebrate locale in southern Coahuila, Mexico. Journal of Vertebrate Paleontology 23(3):47A
  • R. A. Rodríguez-de la Rosa, D. A. Eberth, D. B. Brinkman, S. D. Sampson, and J. López-Espinoza. 2003. Dinosaur tracks from the late Campanian Las Aguilas locality, southeastern Coahuila, Mexico. Journal of Vertebrate Paleontology 23(3):90A
  • J. I. Kirkland and M. C. Aguillón-Martínez. 2002.Schizorhiza: a unique sawfish paradigm from the Difunta Group, Coahuila, Mexico. Revista Mexicana de Ciencias Geológicas 19(1):16-24
  • R. A. Rodriguez-de la Rosa and S. R. S. Cevallos-Ferriz. 1998. Vertebrates of the El Pelillal locality (Campanian, Cerro del Pueblo Formation), southeastern Coahuila, Mexico. Journal of Vertebrate Paleontology 18(4):751-764
  • R. Hernández-Rivera. 1997. Mexican dinosaurs. In P. J. Currie & K. Padian (ed.), Encyclopedia of Dinosaurs 433-437
  • R. A. Rodriguez-de la Rosa and S. R. S. Cevallos-Ferriz. 1994. Upper Cretaceous Zingiberalean fruits with in situ seeds from Southeastern Coahuila, Mexico. International Journal of Plant Sciences 155(6):786-805
  • R. Hernández and J. I. Kirkland. 1993. The rediscovery of a rich uppermost Campanian dinosaur locality in the Cerro del Pueblo Fm., Coahuila, Mexico. Journal of Vertebrate Paleontology 13(3, suppl.):41A
  • G. E. Murray, D. R. Boyd, J. A. Wolleben and J. A. Wilson. 1960. Late Cretaceous fossil locality, eastern Parras Basin, Coahuila, Mexico. Journal of Paleontology 34(2):368-370
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