Saturday, March 2, 2013

Anataphrus vigilans from the Maquoketa formation

I'm hoping to get out to the Midwest this spring and collect the Maquoketa formation for myself but until then I get lots of nice specimens from Tim on E-bay. I bought this nice enrolled specimen of Anataphrus vigilans (from Eldorado, Iowa) from him not too long ago.

The Maquoketa formation is late Ordovician in ageand roughly corresponds to the Richmondian stage (Hirnantian stage of the ICS). This makes it a good comparison to the similarly aged fossils found near Cincinnati and northern Kentucky.

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