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