†family Pliomeridae Raymond 1913 (trilobite)

Trilobita - Phacopida - Pliomeridae

Synonym: Hammatocnemidae Kielan 1960

Parent taxon: Phacopida according to H. B. Whittington et al. 1997

See also Adrain 2011, Fortey and Droser 1999, Harrington and Leanza 1957 and Nikolaisen 1961

Sister taxa: Acastidae, Bathycheilidae, Bavarillidae, Calmoniidae, Calpmenella, Calymenidae, Calymenina, Cheirurina, Dalmanitidae, Diaphanometopidae, Emsurina, Encrinuridae, Eocheiurus, Eodindymene, Fenestraspis, Feruminops, Forillonaria, Foulonia, Frenerinuroides, Furacopyge, Gourdonia, Hapsiceraurus, Heliocephalus, Hexacosta, Homalonotidae, Ibexaspis, Illaenula, Josephulus, Kolymella, Langgoni, Leiostrototropis, Liolophops, Malladaia, Metapliomerops, Mezocrotalus, Mitchellaspis, Morocconites, Nipponocalymene, Pamirotellus, Parachuangia, Pelitlina, Perirehaedulus, Phacopidae, Phacopina, Phalangocephalus, Pharostomatidae, Pilekiidae, Podolites, Probolops, Prodontochile, Prosopiscidae, Pterygometopidae, Ptychometopus, Punillaspis, Rabienops, Radiopyge, Renniella, Reraspis, Reussiana, Rhinophacops, Rhinoreedops, Roncellia, Sambremeusapis, Sanidopyge, Scabrella, Schoharia, Spinodontochile, Teichertops, Toxophacops, Trypaulites, Turcopyge, Typhloiscus, Victorispina, Wallacia

Subtaxa: Anapliomera Benedettia Colobinion Cybelopsinae Encrinurella Evropeites Guizhoupliomerops Hintzeia Obliteraspis Ovalocephalus Parapliomera Perissopliomera Placoparia Pliomera Pliomerella Pliomeridius Pliomerina Pliomerinae Protoencrinurella Protopliomerella Protopliomerops Pseudomera Quinquecosta Rossaspis Tesselacauda

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Ecology: fast-moving low-level epifaunal carnivore

Distribution:

• Ordovician of Argentina (34 collections), Australia (43), Bolivia (1), Canada (38: Alberta, British Columbia, Newfoundland, Newfoundland and Labrador, Ontario, Quebec), China (19), the Czech Republic (6), Estonia (2), France (6), Kazakhstan (4), Morocco (5), Norway (5), Portugal (4), the Russian Federation (15), Spain (20), Sweden (23), the United Kingdom (11), United States (185: California, Idaho, Iowa/Wisconsin, Montana, Nevada, Oklahoma, Tennessee, Utah, Virginia)

• Chazy of United States (24: New York)

• Llandeilo of the United Kingdom (2)

• Whiterockian of Canada (35: Newfoundland, Newfoundland and Labrador, Northwest Territories, Quebec), Norway (2), United States (64: California, Nevada, New York, Oklahoma, Utah, Vermont)

• Arenig of Argentina (6), Bolivia (1), Canada (1: Newfoundland and Labrador), China (8), France (1), the Russian Federation (2), Sweden (3), the United Kingdom (4)

• Cassinian of Canada (7: Newfoundland, Newfoundland and Labrador), the United Kingdom (1)

• Arenigian of Canada (1: Northwest Territories), China (2), United States (5: Nevada, Utah)

• Canadian of Canada (2: Northwest Territories, Québec)

Total: 592 collections including 674 occurrences

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