El Chango Quarry (Cretaceous of Mexico)

Where: Chiapas, Mexico (16.6° N, 93.3° W: paleocoordinates 14.2° N, 51.0° W)

When: Sierra Madre Formation, Aptian (125.0 - 113.0 Ma)

• assignment to Sierra Madre based on geographic location; assignment on geologic critera questioned by authors

• group of beds-level stratigraphic resolution

Environment/lithology: dolomite

• 3 meters of a monotous dolomitic carbonate sequence; thickness of the strata range from a few millimeters to about 15 cm.

Size class: macrofossils

Collection methods: quarrying

Primary reference: J. Alvarado-Ortega, E. Ovalles-Damián, and A. Blanco-Piñón. 2009. The fossil fishes from the Sierra Madre Formation, Ocozocoautla, Chiapas, Southern Mexico. Palaeontologia Electronica 12.2.5A [P. Holroyd/P. Holroyd]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 192074: authorized by Patricia Holroyd, entered by Patricia Holroyd on 06.03.2018, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

 Decapoda - Archaeochiapasidae
Archaeochiapasa mardoqueoi n. gen. n. sp. Guinot et al. 2019 crab
 Salmoniformes - Enchodontidae
Enchodus sp. Agassiz 1843
 Aulopiformes - Eurypholidae
Saurorhamphus sp. Heckel 1850
 Ellimmichthyiformes - Paraclupeidae
 Ichthyodectiformes -