30377 - Rare 0.91 Inch Cordania wessmani Lower Devonian Trilobite - Oklahoma USA Palaeoperca The Cobaltoan calcite is a

The Cobaltoan calcite is a variety of calcite containing Co2+ replacing Ca

It may correspond to a juvenile individual or a newly emerged replacement tooth

Rebbachisaurus is distinguished from other sauropods by its unusually tall

†Sclerorhynchus sp

Brackebuschia

30377 - Rare 0.91 Inch Cordania wessmani Lower Devonian Trilobite - Oklahoma USA Palaeoperca The Cobaltoan calcite is aCordania, Clarke 1892 (trilobite) Trilobita Brachymetopidae PaleoDB taxon number: 21127 Parent taxon: Brachymetopidae according to J. M. Adrain and G. J. Kloc 1997 See also Owens and Hammann 1990 and Sepkoski 2002 Sister taxa: Australosutura, Brachymetopinae, Cheiropyge, Hahnus, Latecephalus, Mystrocephala, Narinia, Scharyiinae Subtaxa: none Ecology: fast moving low level epifaunal deposit feeder Environments: marine (2 collections), deep subtidal