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Agua Nueva Formation

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Agua Nueva Formation
Stratigraphic range: Latest Cenomanian to Turonian
↓
TypeFormation
Lithology
PrimaryLimestone
OtherShale. bentonite, chert
Location
CountryMexico
ExtentSan Luis Potosí

The Agua Nueva Formation is a geologic formation in Mexico. It preserves fossils dated to the latest Cenomanian and Turonian ages of the Cretaceous period. It consists "predominantly of alternating fossiliferous, organic matter-rich, laminated, dark gray limestone and non-laminated, organic matter-poor limestone in decimeter-thick beds (10 to 30 cm) with occasional centimetric beds (5 cm) of brown shale that show no apparent internal structures."[1] The formation is noted for its qualities as a Konservat-Lagerstätte, with notable finds including the plesiosaur Mauriciosaurus, the mosasaur Yaguarasaurus and sharks Ptychodus and Aquilolamna.

It appears to have been deposited on the upper part of a shallow continental shelf.[2]

Fossil content

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Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Cartilaginous fish

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Cartilaginous fish of the Agua Nueva Formation
Genus Species Location Member Material Notes Images
Aquilolamna A. milarcae Complete skeleton A bizarre aquilolamnid shark.[3]
Lamniformes indet. Articulated vertebrae An indeterminate mackerel shark, potentially a cretoxyrhinid.[4]
Ptychodus P. decurrens Vallecillo Teeth A ptychodontid shark.[5][6]
P. mortoni Teeth
P. sp. Complete skeletons
cf. Scyliorhinus S. sp. Articulated vertebrae A catshark.[7]

Ray-finned fish

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Based on Amalfitano et al (2020):[8]

Ray-finned fish of the Agua Nueva Formation
Genus Species Location Member Material Notes Images
Araripichthys A. sp. An araripichthyid.[2]
Fossil specimen from an unknown location
Belonostomus B. sp. An aspidorhynchid.
Fossil specimen from Germany
Clupeoidei indet. Huehuetla A relative of herrings.[9]
Enchodus E. sp. Huehuetla An enchodontid aulopiform.[9]
Goulmimichthys G. roberti Vallecillo, Huehuetla A pachyrhizodontid crossognathiform.[2][9]
Fossil specimen from Colombia
Hastichthys H. sp. Huehuetla A dercetid aulopiform.[9]
"Nursallia" "N." tethysensis Huehuetla A pycnodont.[9]
Fossil specimen from an unknown location
Pachyrhizodus P. caninus A pachyrhizodontid crossognathiform.
Paranursallia P. gutturosa A pycnodont.
Fossil specimen from an unknown location
Rhynchodercetis R. regio A dercetid aulopiform.[10]
Fossil specimen from Lebanon
Tingitanichthys T. sp. A pachyrhizodontid crossognathiform.[9]
Tselfatia T. formosa Huehuetla A plethodid tselfatiiform.[9]
Fossil specimen from an unknown location
Vallecillichthys V. multivertebratum Vallecillo A saurodontid ichthyodectiform.[2][11]

Lobe-finned fish

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Lobe-finned fish of the Agua Nueva Formation
Genus Species Location Member Material Notes Images
Latimerioidei indet. Gular plate A large-sized marine coelacanth, potentially Megalocoelacanthus. Originally interpreted as a cephalopod gladius and given the name "Palaeoctopus pelagicus".[12]

Reptiles

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Mosasaurs

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Mosasaurs of the Agua Nueva Formation
Genus Species Location Member Material Notes Images
Yaguarasaurus Y. regiomontanus A plioplatecarpine mosasaur.[13]

Plesiosaurs

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Plesiosaurs of the Agua Nueva Formation
Genus Species Location Member Material Notes Images
Mauriciosaurus M. fernandezi A polycotylid plesiosaur.[14]

Molluscs

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Cephalopods

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Cephalopods of the Agua Nueva Formation
Genus Species Location Stratigraphic position Material Notes Images

See also

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References

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  1. ^ Blanco, Alberto; Ángeles-Trigueros, Susana Abigail; Hernández-Ávila, Juan; Silva-Martínez, Luis E.; Zavala-Díaz de la Serna, Francisco Javier; Ambrocio-Cruz, Silvia Patricia; Castañeda-Posadas, Carlos; Blanco, Alberto; Ángeles-Trigueros, Susana Abigail; Hernández-Ávila, Juan; Silva-Martínez, Luis E. (2016). "Microscopic biomorphic structures in Upper Cretaceous marine sedimentary pyrite". Revista Mexicana de Ciencias Geológicas. 33 (3): 378–386. ISSN 1026-8774.
  2. ^ a b c d Blanco, Alberto; Cavin, Lionel (2003-07-01). "New Teleostei from the Agua Nueva Formation (Turonian), Vallecillo (NE Mexico)". Comptes Rendus Palevol. 2 (5): 299–306. Bibcode:2003CRPal...2..299B. doi:10.1016/S1631-0683(03)00064-2. ISSN 1631-0683.
  3. ^ Vullo, Romain; Frey, Eberhard; Ifrim, Christina; González González, Margarito A.; Stinnesbeck, Eva S.; Stinnesbeck, Wolfgang (2021-03-19). "Manta-like planktivorous sharks in Late Cretaceous oceans". Science. 371 (6535): 1253–1256. Bibcode:2021Sci...371.1253V. doi:10.1126/science.abc1490. PMID 33737486.
  4. ^ Blanco-Piñón, Alberto; Shimada, Kenshu; González-Barba, Gerardo; Blanco-Piñón, Alberto; Shimada, Kenshu; González-Barba, Gerardo (2005). "Lamnoid vertebrae from the Agua Nueva Formation (Upper Cretaceous: lower Turonian), northeastern Mexico". Revista Mexicana de Ciencias Geológicas. 22 (1): 19–23. ISSN 1026-8774.
  5. ^ Blanco-Piñón, Alberto; Garibay-Romero, Luis M.; Alvarado-Ortega, Jesús (2007). "The oldest stratigraphic record of the Late Cretaceous shark Ptychodus mortoni Agassiz, from Vallecillo, Nuevo León, northeastern Mexico". Revista Mexicana de Ciencias Geológicas. 24 (1): 25–30. ISSN 1026-8774.
  6. ^ Vullo, Romain; Villalobos-Segura, Eduardo; Amadori, Manuel; Kriwet, Jürgen; Frey, Eberhard; González González, Margarito A.; Padilla Gutiérrez, José M.; Ifrim, Christina; Stinnesbeck, Eva S.; Stinnesbeck, Wolfgang (2024-04-24). "Exceptionally preserved shark fossils from Mexico elucidate the long-standing enigma of the Cretaceous elasmobranch Ptychodus". Proceedings of the Royal Society B: Biological Sciences. 291 (2021): 20240262. doi:10.1098/rspb.2024.0262. PMC 11040243. PMID 38654646.
  7. ^ "Vallecillo, Nuevo León: una nueva localidad fosilífera del Cretácico Tardío en el noreste de México | Revista Mexicana de Ciencias Geológicas". rmcg.geociencias.unam.mx. Retrieved 2025-02-05.
  8. ^ Amalfitano, Jacopo; Giusberti, Luca; Fornaciari, Eliana; Carnevale, Giorgio (2020-04-03). "Upper Cenomanian Fishes from the Bonarelli Level (Oae2) of Northeastern Italy". Rivista Italiana di Paleontologia e Stratigrafia. 126 (2). doi:10.13130/2039-4942/13224. ISSN 2039-4942.
  9. ^ a b c d e f g Alvarado-Ortega, Jesús; Cantalice Severiano, Kleyton Magno; Barrientos-Lara, Jair Israel; Díaz-Cruz, Jesús Alberto; Than-Marchese Aguilera, Bruno Andrés (2019-03-13). "The Huehuetla quarry, a Turonian deposit of marine vertebrates in the Sierra Norte of Puebla, central Mexico". Palaeontologia Electronica. 22. doi:10.26879/921. Retrieved 2025-02-05.
  10. ^ Blanco, Alberto; Alvarado-Ortega, Jesús (2006-09-11). "Rhynchodercetis regio, sp. nov., a dercetid fish (Teleostei: Aulopiformes) from Vallecillo, Nuevo León State, Northeastern Mexico". Journal of Vertebrate Paleontology. 26 (3): 552–558. doi:10.1671/0272-4634(2006)26[552:RRSNAD]2.0.CO;2. ISSN 0272-4634.
  11. ^ Blanco-Piñón, Alberto; Alvarado-Ortega, Jesús (2007). "Review of Vallecillichthys multivertebratum (Teleostei: Ichthyodectiformes), a Late Cretaceous (early Turonian) "Bulldog fish" from northeastern Mexico". Revista Mexicana de Ciencias Geológicas. 24 (3): 450–466. ISSN 1026-8774.
  12. ^ Schultze, Hans-Peter; Fuchs, Dirk; Giersch, Samuel; Ifrim, Christina; Stinnesbeck, Wolfgang (2010). "Palaeoctopus pelagicus from the Turonian of Mexico reinterpreted as a coelacanth (Sarcopterygian) gular plate". Palaeontology. 53 (3): 689–694. Bibcode:2010Palgy..53..689S. doi:10.1111/j.1475-4983.2010.00943.x. ISSN 1475-4983.
  13. ^ Rivera-Sylva, Héctor E.; Longrich, Nicholas R.; Padilla-Gutierrez, José M.; Guzmán-Gutiérrez, José Rubén; Escalante-Hernández, Víctor M.; González-Ávila, José G. (2024-01-01). "A new species of Yaguarasaurus (Mosasauridae: Plioplatecarpinae) from the Agua Nueva Formation (Upper Turonian – ?Lower Coniacian) of Nuevo Leon, Mexico". Journal of South American Earth Sciences. 133: 104694. Bibcode:2024JSAES.13304694R. doi:10.1016/j.jsames.2023.104694. ISSN 0895-9811.
  14. ^ Frey, Eberhard; Mulder, Eric W. A.; Stinnesbeck, Wolfgang; Rivera-Sylva, Héctor E.; Padilla-Gutiérrez, José Manuel; González-González, Arturo Homero; Frey, Eberhard; Mulder, Eric W. A.; Stinnesbeck, Wolfgang; Rivera-Sylva, Héctor E.; Padilla-Gutiérrez, José Manuel; González-González, Arturo Homero (2017). "A new polycotylid plesiosaur with extensive soft tissue preservation from the early Late Cretaceous of northeast Mexico". Boletín de la Sociedad Geológica Mexicana. 69 (1): 87–134. Bibcode:2017BoSGM..69...87F. doi:10.18268/BSGM2017v69n1a5. ISSN 1405-3322.
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