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Geological
Time: Middle Ordovician
Size (25.4 mm = 1
inch): 50 mm long by 32 mm wide on a 78 by 62 mm matrix
Location: Asery Horizon
deposits of the Lopuchinka River region near Saint Petersburg, Russia
Fossil Code:
RT024
Price: $95.00
- sold
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 Description:
This is an example of the unusual trilobite Illaenus intermedius.
This is one of the 50-odd members of the genus, and known for the
high profile of the cephalon which is thought to have aided the
trilobite in ploughing through the substrate in search of a meal.
It is also one of the less common of the genus, with this one in
a relatively prone position; most Illaenus are seen in an enrolled
position, presumably a result of post mortem contraction of muscles
in the massive cephalon. See my other offerings for an example with
an unusually- prepared Asaphid.
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