Tags: Crustacean.

Lirceus usdagalun is a rare species of crustacean known by the common name Lee County cave isopod. It is endemic to Virginia in the United States where it is known from a single network of karst cave systems in Lee County. It is threatened by a number of processes. It is a federally listed endangered species of the United States.This isopod is a troglobite an organism that spends its entire life in subterranean caves. It is roughly 7 millimeters long. It lacks eyes and pigmentation.

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