La Puente Pit (Paleocene to of Colombia)

Also known as Carbon Cerrejón; Cerrejón Coal Mine

Where: Guajira, Colombia (11.1° N, 72.5° W: paleocoordinates 8.5° N, 59.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Cerrejón Formation, Middle Paleocene to Middle Paleocene (61.7 - 58.7 Ma)

• Dates [60 to 58 Ma] based on 13C correlation to Zachos et al. (2001) global isotope curve. Age estimation from Jaramillo et al. (2007), Palynology, 31:153-189.

• formation-level stratigraphic resolution

Environment/lithology: delta plain; gray, muddy claystone and argillaceous, sandy sandstone

• "a large fluvial depositional setting, pertaining to the ancient Amazonian basin" having a "coastal influence [that] may represent a transition between the marine habitat of most dyrosaurids and a more fully fluvial environment" (Hastings et al. 2011)
• JA: shown as a being a "sandy mudstone-siltstone" in a figure by Hastings et al. 2011; preservation of specimens indicates that the rocks are not strongly lithified

Size class: macrofossils

Reposited in the FLMNH

Collection methods: salvage, surface (in situ), mechanical,

• Specimens on loan to FLMNH, official repository is IGM (Bogota)

Primary reference: J. J. Head, J. I. Bloch, A. K. Hastings, J. R. Bourque, E. A. Cadena, F. A. Herrera, P. D. Polly and C. A. Jaramillo. 2009. Giant boid snake from the Paleocene neotropics reveals hotter past equatorial temperatures. Nature 457:715-717 [J. Head/J. Head]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 106271: authorized by Jason Head, entered by Jason Head on 05.03.2011, edited by John Alroy, Roger Benson and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

 Teleostei -
 Dipnoi -
Dipnoi sp. lungfish
 Testudines -
Pelomedusoides " shell taxon A "3 sideneck turtle
UF/IGM 71 (nearly complete, somewhat crushed, articulated carapace and plastron)
Pelomedusoides " shell taxon B "3 sideneck turtle
UF/IGM 72 (carapace and plastron), UF/IGM 73 (partially articulated shell), UF/IGM 74 (partially articulated shell) and UF/IGM 75 (nuchal and left costal 1)
 Testudines - Podocnemidae
Cerrejonemys wayuunaiki n. gen. n. sp.1, Carbonemys cofrinii n. gen. n. sp.3
Cerrejonemys wayuunaiki n. gen. n. sp.1 Cadena et al. 2010 sideneck turtle
Carbonemys cofrinii n. gen. n. sp.3 Cadena et al. 2012 sideneck turtle
UF/IGM 41 - holotype (nearly complete skull)
 Testudines - Bothremydidae
Puentemys mushaisaensis2 Cadena et al. 2012 sideneck turtle
From clay layer underlying coal seam 90. UF/IGM 50-64 were reported from claystone layers under Coal Seams 40, 85, 90, and 115. But specific horizon data was not given for each specimen
 Loricata - Dyrosauridae
Acherontisuchus guajiraensis4 Hastings et al. 2011 crocodilian
UF ⁄ IGM 35, mandible including left and right dentaries and splenials, the left surangular, angular and articular, and a total of three partial teeth. Associated postcrania include two ribs, one sacral vertebra with partial sacral ribs and one metatarsal. These fossils were recovered from the underclay of Coal Seam 90 within the La Puente Pit
Cerrejonisuchus improcerus n. gen. n. sp.5 Hastings et al. 2010 crocodilian
 Squamata - Boidae
Titanoboa cerrejonensis n. gen. n. sp.
Titanoboa cerrejonensis n. gen. n. sp. Head et al. 2009 boa
UF/IGM 1 (holotype), a single precloacal vertebra; UF/IGM 2 (paratype), nearly complete precloacal vertebra; UF/IGM 3–UF/IGM 28, 184 additional precloacal vertebrae and ribs representing 28 individuals