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Thick-shelled turtle species lived with world's biggest snake, reveals fossil found in Colombian coal mine

Date:
April 8, 2010
Source:
Smithsonian Tropical Research Institute
Summary:
The discovery of a new fossil turtle species in Colombia's Cerrejón coal mine by researchers helps to explain the origin of one of the most biodiverse groups of turtles in South America.

Deep in Colombia's Cerrejon coal mine, among house-sized trucks, Edwin Cadena discovered Cerrejonemys wayuunaiki, a new species of fossil turtle, which sheds light on the evolution of turtles in the Americas and beyond.
Credit: Edwin Cadena

The discovery of a new fossil turtle species in Colombia's Cerrejón coal mine by researchers from the Smithsonian Tropical Research Institute in Panama and the Florida Museum of Natural History helps to explain the origin of one of the most biodiverse groups of turtles in South America.

Cerrejonemys wayuunaiki takes its genus name from Cerrejón, and emys -- Greek for turtle. Its species name is the language spoken by the Wayuu people who live on the Guajira Peninsula in northeastern Colombia near the mine.

About as thick as a standard dictionary, this turtle's shell may have warded off attacks by the Titanoboa, thought to have been the world's biggest snake, and by other, crocodile-like creatures living in its neighborhood 60 million years ago.

"The fossils from Cerrejón provide a snapshot of the first modern rainforest in South America -- after the big Cretaceous extinctions and before the Andes rose, modern river basins formed and the Panama land bridge connected North and South America," explains Carlos Jarmillo, staff scientist at the Smithsonian who studies the plants from Cerrejón.

"We are still trying to understand why six of this turtle's modern relatives live in the Amazon, Orinoco and Magdalena river basins of South America and one lives in Madagascar," explains Edwin Cadena, first author of the study and a doctoral candidate at North Carolina State University. "It closes an important gap in the fossil record and supports the idea that the group originated near the tip of South America before the continent separated from India and Madagascar more than 90 million years ago."

Cadena will characterize two more new turtle species and analyze the histology of fossil turtle bones from the Cerrejón site. "I hope this will give us an even better understanding of turtle diversity in the region and some important clues about the environment where they lived."


Story Source:

The above story is based on materials provided by Smithsonian Tropical Research Institute. Note: Materials may be edited for content and length.


Journal Reference:

  1. Edwin Cadena, Jonathan Bloch, Carlos Jaramillo. New Podocnemidid Turtle (Testudines: Pleurodira) from the Middle-Upper Paleocene of South America. Journal of Vertebrate Paleontology, 2010; 30 (2): 367 DOI: 10.1080/02724631003621946

Cite This Page:

Smithsonian Tropical Research Institute. "Thick-shelled turtle species lived with world's biggest snake, reveals fossil found in Colombian coal mine." ScienceDaily. ScienceDaily, 8 April 2010. <www.sciencedaily.com/releases/2010/04/100406133714.htm>.
Smithsonian Tropical Research Institute. (2010, April 8). Thick-shelled turtle species lived with world's biggest snake, reveals fossil found in Colombian coal mine. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2010/04/100406133714.htm
Smithsonian Tropical Research Institute. "Thick-shelled turtle species lived with world's biggest snake, reveals fossil found in Colombian coal mine." ScienceDaily. www.sciencedaily.com/releases/2010/04/100406133714.htm (accessed July 31, 2014).

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