Euproops danae was a small xiphosuran. The horseshoe crab is its closest living relative.
Euproops is relatively common in the deposit. Several lines of evidence suggest that it may have been freshwater or lived part of its life on land.
The top specimen is the holotype for Euproops thompsoni. The bottom specimen is the holotype for Streptocyclus langfordi. Both of these taxa have been synonymized with Euproops danae.