Tags: Crustacean.

Tanzanonautes tuerkayi is a species of fossil freshwater crab from Tanzania the only species in the genus Tanzanonautes. It is the oldest known freshwater crab and probably dates from the Oligocene; the next oldest specimens are from the Miocene. A number of fragmentary remains were discovered in the Songwe Valley part of the East African Rift in Mbeya Region Tanzania (approximately 8°56′S 33°12′E) in fragile sandstone sediments.

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