Trilobita - Phacopida - Pliomeridae
Parent taxon: Pliomeridae according to F. Nikolaisen 1961
See also Phleger 1933
Sister taxa: Anapliomera, Benedettia, Colobinion, Cybelopsinae, Encrinurella, Evropeites, Gogoella, Guizhoupliomerops, Hammatocneminae, Hintzeia, Ibexaspis, Josephulus, Leiostrototropis, Lemureops, Liexiaspis, Obliteraspis, Parapliomera, Perissopliomera, Placoparia, Pliomera, Pliomerella, Pliomeridius, Pliomerina, Protoencrinurella, Protopliomerella, Protopliomerops, Pseudomera, Rossaspis
Subtaxa: Pliomerops
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Whiterockian of Canada (10: Quebec collections), Norway (1), United States (22: Nevada, New York, Oklahoma, Utah, Vermont)
• Chazyan of Canada (4: Quebec), United States (27: New York, Oklahoma, Tennessee)
• Fennian of France (1)
• Arenig of Argentina (2), China (1), France (1), Sweden (3)
• Ordovician of China (1), the Czech Republic (1), Norway (2), the Russian Federation (1), Sweden (1), United States (10: Nevada, Utah)
Total: 88 collections each including a single occurrence