Geological
Time: Middle Ordovician, Asery Horizon
Size (25.4
mm = 1 inch): 70 mm long by 44 mm wide on a 70 mm by 55 mm matrix
Fossil Site:
Vilpovitsy Quarry, Wolchow River Region, St Petersburg, Russia
Fossil Code:
RUT765
Price: $195.00
- Sold
Description: Coming from the Middle
Ordovician Asery Level deposits of the Wolchow River region near
Saint Petersburg, Russia, this is a large example of the trilobite
Asaphus kowalewskii. Its caramel-colored Calcite shell is well set
off by the white limestone matrix. The genus Asaphus underwent some
remarkable adaptations to changes in turbidity during the Ordovician,
with this one presumably arising in a time of increased turbidity.
One thought is that the trilobite may have lain in wait for prey
buried in the bottom sediment with only its dramatic 25 mm periscope
eyestalks protruding. As is often the case, the eyestalks are repaired
when they undergo preparation, but that detracts not at all from
this fine large example. As always, the skillful Russian preparators
have shown this fine specimen to best advantage, well-positioned
on its limestone matrix. |
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