Fossils highlight Canada-Russia connection 53 million years ago

Fossils highlight Canada-Russia connection 53 million years ago
A new species of scorpionfly fossil from 53 million years ago at McAbee, British Columbia named Eomerope eonearctica. This insect is very similar to a fossil species that lived at the same time north of Vladivostok on the Asian Pacific coast, highlighting connections between Canada and Russia in ancient times. Credit: SFU

A new 53 million-year-old insect fossil called a scorpionfly discovered at B.C.'s McAbee fossil bed site bears a striking resemblance to fossils of the same age from Pacific-coastal Russia, giving further evidence of an ancient Canada-Russia connection.

"We've seen this connection before through and animals, but these insects show this in a beautiful way," says Bruce Archibald, a research associate in SFU's Department of Biological Sciences and the Royal BC Museum. "They are so much alike that only the wing colour of the new McAbee tells them apart." Archibald and Alexandr Rasnitsyn, of Moscow's Russian Academy of Sciences, described the find and its significance in this month's The Canadian Entomologist.

"I'm not aware of any case where two such species so much alike and so close in age have been found in both Pacific Russia and Pacific Canada, and that's pretty great," said Archibald. He notes that the insect's only living relative is found in the temperate forest of central Chile, which has a climate that is similar in ways to B.C.'s 53 million years ago.

The new Canadian species was named Eomerope eonearctica, and its Russian doppelganger is Eomerope asiatica, described in 1974. The McAbee fossil site has been designated a provincial heritage by the province of B.C. for its spectacular fossil record. Archibald and Rasnitsyn also described a second new scorpionfly species that was found near Princeton, B.C.

More information: S. Bruce Archibald et al, Two new species of fossil Eomerope (Mecoptera: Eomeropidae) from the Ypresian Okanagan Highlands, far-western North America, and Eocene Holarctic dispersal of the genus, The Canadian Entomologist (2018). DOI: 10.4039/tce.2018.13

Citation: Fossils highlight Canada-Russia connection 53 million years ago (2018, March 29) retrieved 23 June 2024 from
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