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Name: Asaphus
lepidurus (Russian
Trilobite)
Age: Lower
Ordovician Wolchovian Horizon
Size: inches (25.4mm=1
inch): 60 mm long by 35 mm wide on a 115 by 105 mm matrix.
Location: Wolchovian
Level deposits of the Wolchow River region near Saint Petersburg, Russia
Code: RUT556
Price: $85.00
- sold
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 Description:
A large, well-inflated example of an ancient member of the Asaphidae,
this is Asaphus raniceps. The region in which these trilobites lived
was subject to dramatic changes in salinity and turbidity, and the
trilobites were able to make rapid (geologically speaking) evolutionary
adjustments. These adjustments were thought to be able to allow
them to see both predator and prey more easily. This taxon was a
stem trilobite that ultimately led to Asapahus ornatus, the last
survivor of the genus.
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