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Tiny crab preserved in 100-million-year-old amber lived among dinosaurs - CNN

Tiny crab preserved in 100-million-year-old amber lived among dinosaurs - CNN

Tiny crab preserved in 100-million-year-old amber lived among dinosaurs - CNN
Oct 20, 2021 1 min, 4 secs

While the oldest crab fossils date back to the Jurassic period more than 200 million years ago, fossils of non-marine crabs are sparse and largely incomplete.

The researchers said that Cretapsara proves that crabs made the leap from the sea to land and fresh water during the dinosaur era, not during the mammal era, as previously thought, pushing the evolution of non-marine crabs much farther back in time.

"In the fossil record, non-marine crabs evolved 50 million years ago, but this animal is twice that age," said Luque.

Dinosaur-era amber fossils are only found in deposits from Kachin State in northern Myanmar, and ethical concerns about the provenance of amber from the region have emerged in recent years.

The Society of Vertebrate Paleontology called for a moratorium on research on amber sourced from Myanmar after 2017 when the country's military took control of some amber mining areas.

The authors of this study said the amber specimen was acquired by the Longyin Amber Museum from a vendor in the city of Tengchong near the border with Myanmar in southern China in August 2015.

They hoped by "conducting research on specimens collected before the conflict and acknowledging the situation in the Kachin State will serve to raise awareness of the current conflict in Myanmar and the human cost behind it."

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