Detail of an invertebrate trackway specimen from Coconino Sandstone.
The currently accepted name of this trackway is Paleohelcura tridactyla Gilmore, 1926 (=P. dunbari Brady, 1961), but Cedric L. Clendenon, Biology Ph.D., has made a strong case for using Stiaria intermedia (Smith, 1909) as a senior synonym, which is used for similar trackways.
GRI #441a
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