Wikipedia
Ptychaspididae
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