Trilobita - Olenida - Pterocephaliidae
Full reference: A. R. Palmer. 1960. Trilobites of the Upper Cambrian Dunderberg Shale, Eureka District, Nevada. United States Geological Survey Professional Paper 334-C:53-107
Parent taxon: Pterocephaliidae according to M. J. Hopkins 2011
See also Palmer 1960
Sister taxa: Anechocephalus, Aphelaspidinae, Beigongia, Bromella, Cilia, Dikelocephalites, Flabellocephalus, Housia, Housiinae, Jubileia, Labiostrella, Lunacephalus, Luotuolingia, Metachangshania, Morosa, Paramaladioidella, Pauciella, Pedinaspis, Pedinocephalites, Pelicephalus, Plesiocilia, Proapatokephaloides, Prodikelocephalites, Protemnites, Pseudaphelaspis, Pulchricapitus, Stenambon, Tumicephalus, Uxunella, Yangweizhouia, Yingziaspis, Camaraspis
Subtaxa: Cernuolimbus Pterocephalia Sigmocheilus Strigambitus
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Cambrian of Canada (10: Alberta, British Columbia, Newfoundland, Yukon collections), the Russian Federation (2), United States (105: Alaska, Arkansas, California, Indiana, Missouri, Montana, Nevada, Nevada and Utah, Oklahoma, Texas, Utah, Wyoming)
Total: 117 collections including 144 occurrences