La Parrita (SEPCP-9): Late Campanian, Mexico
collected 2006

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Charales - Porocharaceae
Aguillon Martínez 2010
Chondrichthyes - Rajiformes - Rhinobatidae
Aguillon Martínez 2010 1 specimen
SEPCP 9/573
unclassified
Aguillon Martínez 2010 2 specimens
SEPCP 9/575 (ganoid scale), 9/576 (coprolite)
Amphibia - Temnospondyli
Aguillon Martínez 2010 6 specimens
SEPCP 9/583, 584, 588–590, 733
Amphibia - Temnospondyli - Urodela
Aguillon Martínez 2010 1 specimen
SEPCP 9/741
Reptilia
Aguillon Martínez 2010 1 specimen
SEPCP 9/628
Reptilia - Mosasauridae
Listed as associated fauna - no specimen numbers given.
Reptilia
Aguillon Martínez 2010 2 specimens
SEPCP 9/630, 734
Aguillon Martínez 2010 3 specimens
SEPCP 9/582, 717, 718
Reptilia - Anguidae
Aguillon Martínez 2010 3 specimens
SEPCP 9/640, 641, 714 ("n. sp.")
Reptilia
Aguillon Martínez 2010 1 specimen
SEPCP 9/631
Aguillon Martínez 2010 3 specimens
SEPCP 9/633, 634, 645
Reptilia - Chamopsiidae
Aguillon Martínez 2010 2 specimens
SEPCP 9/587, 739
Reptilia - Ceratopsidae
Aguillon Martínez 2010 2 specimens
SEPCP 9/699, 785 (teeth)
Reptilia - Hadrosauridae
Ramírez-Velasco et al. 2014 6 individuals
long bones, skull elements (BENC, CPC)
Ramírez-Velasco et al. 2014 1 individual
BENC 18/1-0901
Ramírez-Velasco and Hernández-Rivera 2015
Ramírez-Velasco et al. 2014 1 individual
BENC 1-007
Reptilia - Nodosauridae
Ramírez-Velasco and Hernández-Rivera 2015 3 specimens
2 osteoderms (ICM; PAR-01, 02); BENC 3/4-0001 (tooth)
Reptilia - Troodontidae
Aguillon Martínez 2010 1 specimen
SEPCP 9/778 (tooth)
Ramírez-Velasco and Hernández-Rivera 2015
Reptilia - Dromaeosauridae
Ramírez-Velasco and Hernández-Rivera 2015 1 specimen
dentary teeth, SEPCP 9/644
Aguillon Martínez 2010 6 specimens
SEPCP 9/624, 626, 700, 725, 726, 731
Ramírez-Velasco and Hernández-Rivera 2015
Aguillon Martínez 2010 1 specimen
SEPCP 9/644 (dentary tooth)
Ramírez-Velasco and Hernández-Rivera 2015
Reptilia - Tyrannosauridae
Aguillon Martínez 2010 2 specimens
2 teeth (SEPCP 9/702, 728)
Rivera-Sylva and Longrich 2024 1 individual
Holotype, CPC 2974 (fragment of the maxilla, left and right frontals, the ventral part of the left lacrimal, partial nasals, the posterior end of the left squamosal, fragments of a cervical vertebra, dorsal centrum, fragments of the sacrum, the posterior end of two caudal centra and a caudal neural arch, the left humerus, acetabular region of the left ilium, partial left ischium, left femur, proximal and distal ends of the left tibia, proximal end of the left fibula, left metatarsal II missing the distal end, pedal phalanges II-1, II-2, and III-3). Referred specimens: Part of a left dentary, CPC 3077, including three alveoli and a replacement tooth. Isolated teeth (CPC 3078-3091)
Reptilia - Ornithomimidae
Aguillon Martínez 2010 4 specimens
pedal ungual, 2 caudals (CPC); SEPCP 9/770 (distal end, femur) (Saltillomimus rapidus)
Reptilia
Eusuchia indet. (Huxley 1875)
Rivera-Sylva et al. 2019
CPC 1479-1482 and 1484-1490
Rivera-Sylva et al. 2019
CPC 1483
Reptilia - Testudines
Listed as associated fauna - no specimen numbers given.
Mammalia - Pediomyidae
Aguillon Martínez 2010 1 specimen
SEPCP 9/716, R dentary w/teeth
Mammalia
Aguillon Martínez 2010 1 specimen
SEPCP 9/587, lower molar
Mammalia - Alphadontidae
Aguillon Martínez 2010 1 specimen
SEPCP 9/715, R dentary w/teeth
Mammalia - Multituberculata - Cimolomyidae
Aguillon Martínez 2010 1 specimen
SEPCP 9/585, M2
Actinopteri - Amiiformes - Amiidae
Aguillon Martínez 2010 1 specimen
SEPCP 9/574
Cephalopoda - Ammonitida - Sphenodiscidae
Listed as associated fauna - no specimen numbers given.
see common names

Geography
Country:Mexico State/province:Coahuila
Coordinates: 25.5° North, 101.4° West (view map)
Paleocoordinates:34.6° North, 68.2° West (Wright 2013)
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Campanian 10 m.y. bin: Cretaceous 7
Key time interval: Late Campanian
Age range of interval: 83.6 - 72.2 m.y. ago
Stratigraphy
Geological group:Difunta Formation:Cerro del Pueblo
Stratigraphic resolution:group of beds
Lithology and environment
Primary lithology: "shale"
Includes fossils?Y
Environment:marginal marine indet.
Taphonomy
Modes of preservation:body,concretion
Size of fossils:macrofossils
Spatial resolution:parautochthonous
Collection methods and comments
Collection excludes:some genera
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Collection dates:2006
Metadata
Database number:154244
Authorizer:D. Nicholson, P. Holroyd, P. Mannion, M. Carrano Enterer:D. Nicholson, P. Holroyd, P. Mannion, M. Carrano
Modifier:M. Carrano
Created:2014-02-05 10:24:23 Last modified:2025-02-22 15:12:02
Access level:the public Released:2014-02-05 10:24:23
Creative Commons license:CC0
Reference information

Primary reference:
49984. 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 [D. Nicholson/D. Nicholson]

Secondary references:

82621 M. C. Aguillon Martínez. 2010. Fossil Vertebrates from the Cerro del Pueblo Formation, Coahuila, Mexico, and the Distribution of Late Campanian (Cretaceous) Terrestrial Vertebrate Faunas. 1-135 [M. Carrano/M. Carrano/M. Uhen]
65027 J. D. Gardner and D. G. DeMar. 2013. Mesozoic and Palaeocene lissamphibian assemblages of North America: a comprehensive review. Palaeobiodiversity and Palaeoenvironments 93:459-515 [P. Holroyd/P. Holroyd/M. Carrano]
82636 J. L. Martínez Díaz. 2011. El Registro Fósil de Anquilosaurios (Thyreophora-Ankylosauria) del Cretácico Superior de México [The Fossil Record of Ankylosaurs (Thyreophora-Ankylosauria) from the Upper Cretaceous of Mexico]. 1-49 [M. Carrano/M. Carrano/M. Uhen]
55641 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 [M. Carrano/M. Carrano]
82620 Á A. Ramírez-Velasco and R. Hernández-Rivera. 2015. Diversity of Late Cretaceous dinosaurs from Mexico. Boletín Geológico y Minero 126(1):63-108 [M. Carrano/M. Carrano]
70213 H. E. Rivera-Sylva, G. Carbot-Chanona, R. Vivas-González, L. Nava-Rodríguez, and F. Cabral-Valdéz. 2019. The first crocodyliforms remains from La Parrita locality, Cerro del Pueblo Formation (Campanian), Coahuila, Mexico. Boletín de la Sociedad Geológica Mexicana 71(3):727-739 [P. Mannion/P. Mannion]
90509 H. E. Rivera-Sylva and N. Longrich. 2024. A new tyrant dinosaur from the late Campanian of Mexico reveals a tribe of southern tyrannosaurs. Fossil Studies 2(4):245–272 [E. Dunne/E. Dunne/M. Carrano]