Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: †Trilobitomorpha
Classis: †Trilobita
Ordo: †Asaphida
Superfamilia: Dikelocephaloidea
Familia: Ptychaspididae
Genera: Alborsella - Changia - Eoptychaspis - Eowuhuia - Euptychaspis - Idiomesus - Kathleenella - Keithia - Keithiella - Macronoda - Plectrella - Proricephalus - Ptychaspis - Saukioides - Sunwaptia - Wilcoxaspis
Name
Ptychaspididae Raymond 1924
Ptychaspididae is a family of trilobites, containing the following genera:[1]
Alborsella
Changia
Eoptychaspis
Eowuhuia
Euptychaspis
Idiomesus
Kathleenella
Keithia
Keithiella
Macronoda
Plectrella
Proricephalus
Ptychaspis
Saukioides
Sunwaptia
Wilcoxaspis
References
S. M. Gon III. "Order Asaphida". Retrieved November 21, 2010.
Retrieved from "http://en.wikipedia.org/"
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