Asaphus
punctatus
Trilobite
Order Asaphida, Superfamily Asaphoidea, Family Asaphidae
Geologic
Time: Middle Ordovician Asery Horizon
Size: mm
(25.4mm=1 inch): 55 mm long by 30 mm wide on a 70 mm by 70 mm matrix
Fossil
Site: Wolchow River Region, St Petersburg, Russia
Code: RUT920
Price: $115.00
- sold
|  Description:
A well-inflated example of a high-eyestalked member of the Asaphidae,
this is Asaphus punctatus. 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. The taxon
has variable eyestalk height, with this one having the extensions
most sought after by discerning collectors.
Also
see: Russian
trilobites
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