"Tobias" is a fine example of a trilobite from the genus Flexicalymene - Maidir basin, Morocco.

Calymenina is a suborder of the trilobite order Phacopida.[1]

References

  1. ^ Sam Gon III. "Order Phacopida". Retrieved November 13, 2010.
Allikas: http://en.wikipedia.org/wiki/Calymenina
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