your internet guide to all things catfish
|Corydoras revelatus a Fossil Discovery|
by Allan James
The last of the dinosaurs disappeared
from the earth around 65 million years ago so our
fossil friend Corydoras revelatus lived in
the Tertiary period just after this, alongside the
hairy mammal. It was discovered in Argentina in Sunchal,
Juyuy province, by a well known entomologist, Professor
T.D.A.Cockerell of the University of Colorado, Boulder,
in 1925. He was actually searching along with his
wife for fossil insects at the time before he came
across our plated friend.
The entomologist T.D.A."Theo"
Cockerell (1866-1948) was better known for his work
on the wild bees of Colorado and wrote many papers
on these insects. He has even a mosquito from Florida
named after him.
How is a fossil
formed?. Well this Corydoras died and was covered
by the mud at the bottom of the river. The river would
have dried up and the sediment compressed and hardened.
The next process would be minerals which would seep
through the bones which gradually change into rock.
Millions of years later the fossil appears as the
covering rock is worn away by wind and water.
Sands, David; Catfishes of the World, Volume 1 Callichthyidae.
Top 2: Eric McCabe
Bottom: Steve Pritchard
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