Ancient asexuals: the boys are back in town

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Asexual fossils
Asexual fossils

The record-holders for the longest abstinence from sex may be about to lose their status, following a discovery on a Japanese island. Every specimen of darwinulid ostracod (a shrimp-like freshwater animal with a hinged shell) that has been examined over the past century has been a female, including fossil ones up to 208 million years old. That makes them the oldest multi-celled creatures to have survived without sex.


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