Carbonemys cofrinii is an extinct giant podocnemidid turtle known from the Middle Paleocene Cerrejón Formation of the Cesar-Ranchería Basin in northeastern Colombia.

[1] In 2005, the holotype specimen was discovered in the Cerrejón coal mine by a North Carolina State University doctoral student named Edwin Cadena.

[1] This would make it one of the world's largest turtles, tied with the Quaternary Peltocephalus maturin and Eocene Drazinderetes in carapace length and only outsized by the Cretaceous protostegids, the Miocene Stupendemys, and two Quaternary testudines (Megalochelys and Titanochelon).

It was likely an omnivore, consuming plants and mollusks as well as smaller reptiles, which were diverse and abundant in its neotropical freshwater habitat.

[6][7] Its cohabitants included other turtles like the smaller podocnemid Cerrejonemys, the giant boid (constrictor) Titanoboa, and crocodylomorphs such as the dyrosaurids Cerrejonisuchus, Acherontisuchus, and Anthracosuchus.