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Orygmaspis is a genus of asaphid trilobite with an inverted egg-shaped outline, a wide headshield, small eyes, long genal spines, 12 spined thorax segments...

Birmanites 1934 Kendallina 1953 Bison Creek Formation Dikelocephalus 1852 Orygmaspis 1938 Morgan Creek Member Cindarella 1996 Chengjiang Biota Helmetia 1912...

Oryctocephaloides Oryctocephalops Oryctocephalus (=Vinakainella) Oryctometopus Orygmaspis Orygmatos Osceolia Osekaspis Osmolskia Otarion (=Aulacopleurella; =Conoparia;...

tenuifolia Nucula †Oncagnostus †Oncagnostus tumidosus †Orodus †Orthoceras †Orygmaspis †Oulodus †Ozarkodina †Palaeoniscus †Paradycheia – type locality for genus...

Probowmania ligea P. linnarssoni = Eldoradia linnarssoni P. llanoensis = Orygmaspis llanoensis P. matheri = Elvinia roemeri P. meglitzkii = Triangulaspis...

for genus †Nisusia † Nix – type locality for genus †Obolus †Ogyginus †Orygmaspis †Ozarkodina †Ozarkodina deflecta †Ozarkodina elongata †Ozarkodina macilenta...

family Anomocarellidae. Orygmaspis (Parabolinoides) doriansmithi Sp. nov Valid Chatterton & Gibb Cambrian (Furongian)  Canada Orygmaspis (Parabolinoides) jenkinsi...

†Orthospirifer †Orthospirifer euruteines †Orthospirifer iowensis †Orthostrophella †Orygmaspis †Oulodus †Ovatia †Ovatia laevicostatus – or unidentified comparable form...

comparable form †Orbiculoidea utahensis †Orbinaria †Orthonychia †Orthotetes †Orygmaspis †Ovatia †Ovatia croneisi †Oxinoxis †Ozarkodina †Ozarkodina deflecta †Ozarkodina...