125-Million-Year-Old Fossil Shines Light on Origin of Subterranean Freshwater Isopods

125-Million-Year-Old Fossil Shines Light on Origin of Subterranean Freshwater Isopods

A new genus and species of cymothoidan isopod that lived during the Early Cretaceous epoch has been identified from two well-preserved specimens found in Lebanon. Stemming from a freshwater lake environment, this isopod provides an unconventional perspective on the evolutionary origin of living cave- and groundwater-dwelling cymothoidans.

Paleoenvironmental habitat reconstruction for Dysopodus gezei (foreground): a Barremian freshwater lake in the region of present-day Bkassine, Lebanon. Image credit: Aldrich Hezekiah.

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