- Metabalangia, Metarthricocephalus, Microryctocara, Neocheiruroides,
Opsiosoryctocephalus, Oryctocara, Oryctocephalina, Oryctocephalites, Oryctocephaloides...
- Metabalangia, Metarthricocephalus, Microryctocara, Neocheiruroides,
Opsiosoryctocephalus, Oryctocara, Oryctocephalina, Oryctocephalites, Oryctocephaloides...
-
Opipeuterella (=Ompheter; =Opipeuter) Opoa
Opsidiscus (=Aulacodiscus)
Opsiosoryctocephalus Orbitoproetus Ordosaspis Ordosia Oreadella Orienturus Orkekeia Orlovia...
-
transversa – type
locality for
species †
Opsiosoryctocephalus – type
locality for
genus †
Opsiosoryctocephalus ophis – type
locality for
species †Orbiculoidea...