Ptychaspididae is a family of trilobites, containing the following genera: Alborsella Changia Eoptychaspis Eowuhuia Euptychaspis Idiomesus Kathleenella Keithia Keithiella Macronoda Plectrella Proricephalus Ptychaspis Saukioides Sunwaptia Wilcoxaspis References Dikelokephaloidea Trilobite families