Trilobita - Phacopida - Encrinuridae
Alternative combinations: Encrinuroides tholus, Frencrinuroides tholus
Full reference: W. R. Evitt and R. P. Tripp. 1977. Silicified Middle Ordovician trilobites from the families Encrinuridae and Staurocephalidae. Palaeontographica Abteilung A 157:109-174
Belongs to Physemataspis according to D. K. Moss and S. R. Westrop 2014
See also Edgecombe et al. 1998
Sister taxa: Physemataspis (Physemataspis), Physemataspis (Prophysemataspis), Physemataspis coopi, Physemataspis insularis, Physemataspis mirabilis, Physemataspis torulatus
Type specimen: USNM 217520, a cephalon/head (cranidium)
Distribution:
• Ordovician of United States (3: Virginia collections)
Total: 3 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.