-
Crepicephalus is an
extinct genus from a well-known
class of
fossil marine arthropods, the trilobites. It
lived from 501 to 490
million years ago during...
- River. The
Dresbachian is
defined by four
trilobite zones: Cedaria-,
Crepicephalus-, Aphelaspis- and
Dunderbergia trilobite zones.[citation needed] The...
- Cr****ibole Cr****ifimbra Cr****iproetus
Crepicephalina (=Mesocrepicephalus)
Crepicephalus Crepichilella Criotypus Cristagnostus Crithias =Endogramma; =Enneacnemis;...
-
Mackenzie Mountains,
northwest Canada) and the
United States (Dresbachian,
Crepicephalus trilobite zone,
Deadwood Formation,
Whitewood Cr**** in Lead County,...
- †Coosina
ariston †
Crepicephalus †
Crepicephalus auratus †
Crepicephalus buttsimontanaenis †
Crepicephalus buttsimontanaensis †
Crepicephalus buttsimotanaensis...
- and
Vernaculina together comprise the
family Cedariidae. C.
buttsi = ?
Crepicephalus C.
woosteri = ? C.
minor appears in the
Upper Cambrian of the United...
- †Cr****idonta †Cr****idonta
stuckenbergi †
Crepicephalus †
Crepicephalus auratus †
Crepicephalus buttsimontanaensis †
Crepicephalus rectus †Crurithyris †Crurithyris...
- †Conchidium †Conocoryphe †Coolina †Coolinia †Coosia †Corbina †Cornulites †
Crepicephalus †Crotalocrinites †Cyathocrinites –
tentative report †Cycloceras †Cypricardinia...
-
Coosella zone,
Riley Formation,
Central Texas, 30.3° N, 97.7° W; and
Crepicephalus trilobite zone,
lower Member of the
Deadwood Formation,
Whitewood Cr****...
-
interbedded with shale, siltstone, and sandstone. Trilobites,
including Crepicephalus, Cedaria, Llanoaspidella, and
Blountia kindlei Resser,
Coosella brevis...
