Trilobita - Asaphida - Ptychaspididae

Parent taxon: Ptychaspididae according to P. A. Jell and J. M. Adrain 2003

Sister taxa: Alborsella, Changia, Coreanocephalus, Idiomesus, Imlerella, Kathleenella, Keithia, Keithiella, Macronoda, Plectrella, Promesus, Proricephalus, Ptychaspis, Sunwaptia, Wilcoxaspis

Subtaxa: none

Ecology: fast-moving low-level epifaunal deposit feeder