The Miocene Whipscorpion Thelyphonus hadleyi Is An Unidentifiable Organic Remain
Journal article published in 2007 by
Jason A. Dunlop 
,
O. Erik Tetlie
,
O. Erik Tetlie
This paper is made freely available by the publisher.
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Abstract
The putative fossil whipscorpion Thelyphonus hadleyi Pierce 1945 (Arachnida: Uropygi) from the middle to late Miocene Monterey Formation of Cabrillo Beach, San Pedro, California is reassessed. It is shown here to be nothing more than a fortuitously shaped stain on the rock, apparently partly algal in nature. The fossil record of whipscorpions can thus be restrained to six Pennsylvanian and one Cretaceous species.