| Name: Trilobita:
Asaphus kowalewskii Russian
trilobite Age:
Middle Ordovician, Asery Horizon
Size: mm
(25.4mm=1 inch): 58 mm long by 35 mm wide on a 145 mm by 100 mm matrix
Location:
Vilpovitsy Quarry, Wolchow River Region, St Petersburg, Russia
Code: RUT821
Price: $225.00
- sold
| Description: Coming from the Middle
Ordovician Asery Level deposits of the Wolchow River region near
Saint Petersburg, Russia, this is a very good 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 15 mm periscope
eyestalks protruding. As always, the skillful Russian preparators
have shown this fine specimen to best advantage, well-positioned
on its limestone matrix. It is quite 3-D in aspect, making for a
fine display specimen. |
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