Xaniopyramis is an extinct genus of xiphosuran, related to the modern horseshoe crab. It lived in the early Carboniferous.
Species Xaniopyramis linseyi Siveter and Selden, 1987
Sources
Invertebrate Palaeontology & Evolution by Euan Neilson Kerr Clarkson
External links Xiphosura at Palaeos.com