Paleohelcura tridactyla – Arthropod: Scorpion trackways (Ichnofossil) – Two well-defined trackways on slab measuring 10.5” x 8” x .25” thick. Longest trackway is 10” long and 1” wide. Second trackway is 7.5” long and .75” wide. Trackways cross at the bottom of the slab. These track-ways provide evidence of a freshwater habitat in a tidal-flat setting. A copy of the scientific paper describing the Keota Ichnofossil assemblage is included with your purchase. Rare!!