Tlayúa Formation

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Tlayúa Formation
Stratigraphic range: Albian
Type Geological formation
Sub-unitsLower, Middle and Upper Members
Underlies Unconformity with Eocene-Oligocene Pie de Vaca Formation
Overlies Orizaba Formation
ThicknessLower: 50 m Middle: 35 m Upper: 40 m
Primary Limestone
Other Mudstone
Coordinates 19°06′N98°12′W / 19.1°N 98.2°W / 19.1; -98.2 Coordinates: 19°06′N98°12′W / 19.1°N 98.2°W / 19.1; -98.2
Approximate paleocoordinates 17°06′N61°36′W / 17.1°N 61.6°W / 17.1; -61.6
Region Puebla
CountryFlag of Mexico.svg  Mexico
Type section
Named forTlayúa Quarry
Mexico relief location map.jpg
Green pog.svg
Tlayúa Formation (Mexico)

The Tlayúa Formation is an Early Cretaceous (late Albian) geological formation near Tepexi de Rodríguez, Puebla. [1]



The formation contains a diverse array of vertebrate and invertebrate fossils. About 70% of the macrofossils are osteichthyan fish. [2] Other vertebrates include chelonians, pterosaurs, lepidosaurs, and crocodiles. [3] Cyanobacteria, foraminifera, algae, gymnosperms, sponges, cnidarians, annelids, gastropods, ammonites, bivalves, arachnids, insects, isopods, anomurans, brachyurans, crinoids, echinoids, holothuroids, stelleroids, and ophiuroids, have also been recovered from the Tlayúa Formation. [3]


Huehuecuetzpalli H. mixtecusA primitive lizard
Pamizinsaurus P. tlayuaensisAn osteoderm-covered sphenodontian
Ankylosphenodon [4] A. pachyostosusAn aquatic sphenodontian
Tepexisaurus [5] T. tepexiiA basal scincomorph
Other fossils

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  1. Applegate, S. (1988). "A new genus and species of a holostean belonging to the family Ophiopsidae, Teoichthys kallistos, from the Cretaceous, near Tepexi de Rodriguez, Puebla" (PDF). Revista Mexicana de Ciencias Geológicas. 7 (2): 200–205.
  2. Alvarado-Ortega J, González-Rodríguez KA, Blaco-Piñón A, Espinosa-Arrubarrena L, Ovalles-Damián E (2006). "Mesozoic Osteichthyans of Mexico". In Vega, FJ, TG Nyborg, MC Perrilliat, M. Montellano-Ballesteros, SRS Cevallos-Ferriz. (eds.). Studies on Mexican Paleontology, Topics on Geobiology 24. Dordrecht, Netherlands: Springer Verlag. pp. 169–207. ISBN   1402039859.
  3. 1 2 Vega FJ, Bruce NL, Serrano L, Bishop GA, Perrilliat MD (2005). "A review of the Lower Cretaceous (Tlayúa Formation: Albian) Crustacea from Tepexi de Rodríguez, Puebla, Central Mexico" (PDF). Bulletin of the Mizunami Fossil Museum (32): 25–30. Archived from the original (PDF) on 2011-06-12.
  4. Reynoso, V. H. (2000). "An Unusual Aquatic Sphenodontian (Reptilia: Diapsida) from the Tlayua Formation (Albian), Central Mexico". Journal of Paleontology. 74 (1): 133–148. doi:10.1017/S0022336000031310. JSTOR   1306891.
  5. Vega, Francisco J.; Nyborg, Torrey G.; María del Carmen Perrilliat; Marisol Montellano-Ballesteros; Sergio R.S Cevallos-Ferriz; Sara A. Quiroz-Barroso (2006). "Research on Fossil Amphibians and Reptiles". In Landman, Neil H. (ed.). Studies on Mexican Paleontology. Vol. 24. Douglas S. Jones. Dordrecht, Netherlands: Springer. p. 214. ISBN   1-4020-3882-8 . Retrieved 31 May 2011.

Further reading