Trilobita - Asaphida - 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 P. A. Jell and J. M. Adrain 2003
Sister taxa: Anechocephalus, Bromella, Camaraspis, Cilia, Dikelocephalites, Housia, Labiostrella, Metachangshania, Parahousia, Paramaladioidella, Pauciella, Pedinocephalites, Pelicephalus, Plesiocilia, Prehousia, Proapatokephaloides, Prodikelocephalites, Protemnites, Pseudaphelaspis, Pterocephaliinae, Pulchricapitus, Sigmocheilus, Strigambitus, Tumicephalus, Uxunella, Yangweizhouia, Yingziaspis
Subtaxa: Morosa brevispina, Morosa extensa, Morosa longispina
Type: Morosa longispina
Ecology: fast-moving low-level epifaunal deposit feeder