22049 - Top Rare Association 2 Crotalocephalina gibbus Lower Devonian Trilobites Tetragramma also known as K-feldspar

also known as K-feldspar

Geology of the Chama Basin

Holcospermum

It only has tiny fractures that have been glued together

22049 - Top Rare Association 2 Crotalocephalina gibbus Lower Devonian Trilobites Tetragramma also known as K-feldsparGreat association of 2 specimens. Crotalocephalina sp, Pibyl and Vanek 1964 (trilobite) Trilobita Phacopida Cheiruridae Parent taxon: Cheiruridae according to P. A. Jell and J. M. Adrain 2002 See also Sepkoski 2002 Sister taxa: Acanthoparyphinae, Anasobella, Ancyginaspis, Arcticeraurinella, Areia, Areiaspis, Borealaspis, Bornholmaspis, Ceraurinium, Ceraurinus, Cerauroides, Cerauromeros, Cerauropeltis, Ceraurus, Chacomurus, Cheirurinae, Cheirurus,