J.PuigReixach on Nostr: _ #FossilFriday 'Horseshoe Crabs' Horseshoe crabs are one of the oldest known ...

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#FossilFriday

'Horseshoe Crabs'

Horseshoe crabs are one of the oldest known arthropods. They appeared some 400 million years ago, even before dinosaursl They have adapted to climate variations and have survived mass extinctions and multiplepredators, and have done so maintaining a morphologically-similar
structure to that of their ancestors.

Caloareous stone slab with a horseshoe crab fossil and trace marks
Mesolimulus walchi
159-144 Ma [Jurassic]
Solnhofen [Germany]

[Cosmocaixa_BCN]

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