Site IGM-1970, Tlayúa Quarry (Alacranes quarry) (Cretaceous to of Mexico)

Also known as Tlayua Quarry, Tepexi de Rodrìguez

Where: Puebla, Mexico (18.6° N, 97.9° W: paleocoordinates 16.5° N, 63.1° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Tlayúa Formation, Middle Albian to Middle Albian (109.0 - 99.6 Ma)

• Middle Member. Cantu-Chapa (1987) recognized the genus Hysteroceras, Mortoniceras, and cf. Anisoceras, which represent a typical late Albian ammonite assemblage of the European zone, being similar to the Mortoniceras inflatum zone (Applegate et al., 2006).

• group of beds-level stratigraphic resolution

Environment/lithology: lagoonal or restricted shallow subtidal; lithified, brown, yellow limestone

• 35-meter sequence of honey-colored, micritic, laminated limestone, with characteristic red, hematitic limestone layers that bear a great diversity of invertebrates and vertebrates

Size class: macrofossils

Preservation: adpression

Collection methods: Repository: Paleontological Museum of the Instituto de Geologia, Universidad Nacional Autonomia de Mexico (IGM UNAM)

Primary reference: R. M. Feldmann, F. J. Vega, S. P. Applegate and G. A. Bishop. 1998. Early Cretaceous Arthropods from the Tlayua Formation at Tepexi de Rodriguez, Puebla, Mexico. Journal of Paleontology 72(1):79-90 [C. Schweitzer/C. Schweitzer/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 138747: authorized by Carrie Schweitzer, entered by Evaline Johnson on 26.01.2013, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Malacostraca
 Decapoda - Tepexicarcinidae
Tepexicarcinus tlayuensis Feldmann et al. 1998 crab
 Isopoda - Archaeoniscidae
Archaeoniscus aranguthyorum Feldmann et al. 1998 isopod
Holothuroidea
 Dendrochirotida - Psolidae
Parapsolus tlayuensis n. gen. n. sp.4
Parapsolus tlayuensis n. gen. n. sp.4 Applegate et al. 2009 sea cucumber
Osteichthyes
 Ophiopsiformes - Ophiopsiellidae
Teoichthys kallistos2 Applegate 1988 ray-finned fish
Actinopteri
 Pycnodontiformes - Pycnodontidae
 Crossognathiformes - Notelopidae
Nusaviichthys nerivelai1 Alvarado-Ortega and Alves 2022
IGM 12996