"There was a long standing question as to whether the Xerces blue butterfly was truly a distinct species or just a population of a very widespread species called the silvery blue that's found ...
Lithopsyche is about 34 million years old, ‘so it’s an old flapper,’ says Claire. ‘Lepidoptera [butterflies and moths] are very rare as fossils because they are so delicate. Even in a fossil hotspot ...