IGM 3869, División del Norte Quarry (Paleocene of Mexico)

Where: Chiapas, Mexico (17.5° N, 92.0° W: paleocoordinates 21.7° N, 75.6° W)

• coordinate estimated from map

When: Tenejapa-Lacandon Formation, Danian (66.0 - 61.6 Ma)

Environment/lithology: marine; marl

• strata in this locality are finely laminated, yellow to beige, poorly carbonated clays, dolomites, and limestones that form a sequence between 5 and 15 cm in thickness. Its bedding planes show microturbidites, bioturbations, and numerous cylindrical (5-30 mm in length) phosphatized fecal pellets probably produced by the fishes, as well as exceptionally frail carbonized plant or algae remains. After the microscopic analysis of thin sections of fossil fish bearing strata from this site, microfossils have not yet been recovered in this unit. The parallel arrangement of these strata is altered by the presence of scarce spherical carbonate enriched nodules with diameters ranging between a few centimeters and up to 10 cm.

Size class: macrofossils

Collection methods: quarrying,

Primary reference: J. Alvarado-Ortega, M. Cuevas-García, M. P. Melgarejo-Damián, K. M. Cantalice, A. Alaniz-Galvan, G. Solano-Templos, and B. A. Than-Marchese. 2015. Paleocene fishes from Palenque, Chiapas, southeastern Mexico. Palaeontologia Electronica (18.2.39A)1-22 [P. Holroyd/P. Holroyd]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 190739: authorized by Patricia Holroyd, entered by Patricia Holroyd on 15.12.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Acanthomorphata -
Kelemejtubus castroi Cantalice and Alvarado-Ortega 2017
 Clupeiformes - Clupeoidei
Clupeidae indet. Bleeker 1859 hering
 Osteoglossiformes - Osteoglossidae
Phareodus sp. Leidy 1873 arowana
 Pycnodontiformes - Pycnodontidae
Pycnodus sp. Agassiz 1835