†subfamily Hammatocneminae Kielan 1960 (trilobite)

Trilobita - Phacopida - Pliomeridae

Alternative spelling: Hammatocnemidae

Parent taxon: Pliomeridae according to Z. Q. Zhou and Z. Y. Zhou 2019

See also Adrain 2011

Sister taxa: Anapliomera, Benedettia, Colobinion, Cybelopsinae, Encrinurella, Evropeites, Gogoella, Guizhoupliomerops, Hintzeia, Ibexaspis, Josephulus, Leiostrototropis, Lemureops, Liexiaspis, Obliteraspis, Parapliomera, Perissopliomera, Placoparia, Pliomera, Pliomerella, Pliomeridius, Pliomerina, Pliomerinae, Protoencrinurella, Protopliomerella, Protopliomerops, Pseudomera, Rossaspis

Subtaxa: Ovalocephalus

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Ecology: fast-moving low-level epifaunal carnivore

Distribution:

• Arenig of China (3 collections)

• Dawan of China (2)

• Arenigian of China (10)

• Ordovician of China (68), Iran (2), Italy (2), Spain (4)

Total: 91 collections including 101 occurrences

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