Ptychaspididae
Encyclopedia
Ptychaspididae is a family
of trilobite
s, containing the following genera:
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...
of trilobite
Trilobite
Trilobites are a well-known fossil group of extinct marine arthropods that form the class Trilobita. The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period , and they flourished throughout the lower Paleozoic era before...
s, containing the following genera:
- Alborsella
- Changia
- Eoptychaspis
- Eowuhuia
- Euptychaspis
- Idiomesus
- Kathleenella
- Keithia
- Keithiella
- Macronoda
- Plectrella
- Proricephalus
- Ptychaspis
- Saukioides
- Sunwaptia
- Wilcoxaspis