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Many thanks to:
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April 2008

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This page last revised 11 May 2008 SMGIII

The Trilobite of the Month for May 2008 is a Russian member of the order Phacopida, Suborder Cheirurina, Family Cheiruridae. The cheirurines are often marked by pygidial lobes or spines, often similar in shape to the thoracic pleurae that precede them. The genae (cheeks) surrounding the eyes often bear pits, which are discernable in this specimen. Russian specimens of this age and locality are often caramel brown on a chalky white matrix, an instantly recognizable combination, but similar to specimens from some Oklahoma deposits, though they are distant in both space and time.

Images like this help explain why trilobites are one of the best-known and appreciated groups of prehistoric animals. Each month, a new example of trilobite diversity will be showcased here. With over 15,000 described species, we may never exhaust the possibilities! If you have a stunning image of a trilobite that you could share as a future "Trilobite of the Month," please let me know!

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