Asaphus
kotlukovi
Trilobite
Order Asaphida, Superfamily Asaphoidea, Family Asaphidae
Geologic
Time : Middle Ordovician, Asery Horizon
Size: 45
mm
Fossil
Site: Wolchow River Region, Vilpovitsy Quaryy, St Petersburg, Russia
|  Description:
A well-inflated example of a medium-eyestalked member of the Asaphidae,
this is Asaphus kotlukovi. 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..
It has a flattened matrix base which allows for various display
modes.
Also
see: Russian
Trilobites Asaphid
Trilobites Russian
Ordovician Asaphus Trilobites Evolutionary Sequence |
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