Trilobita - Phacopida - Pterygometopidae
Full reference: R. Ludvigsen and B. D. E. Chatterton. 1982. Ordovician Pterygometopidae (Trilobita) of North America. Canadian Journal of Earth Sciences 19:2179-2206
Parent taxon: Eomonorachinae according to R. Ludvigsen and B. D. E. Chatterton 1982
See also Jell and Adrain 2002 and Sepkoski 2002
Sister taxa: Calyptaulax, Denella, Eomonorachus, Liocnemis, Podowrinella, Tricopelta
Subtaxa: Sceptaspis lincolnensis
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Ordovician of Canada (5: Northwest Territories, Ontario, Quebec collections), the Russian Federation (4), United States (17: Illinois, Iowa, Iowa/Wisconsin, Minnesota, Missouri)
Total: 26 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.