composed by augite
the direction of elongation being perpendicular to the single plane of symmetry
Lavocat 1954
because many pollen grains are preserved inside the coprolites
are oriented posteriorly since their origin and the lingual margin is curved
30286 - Gorgeous 2.86 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Cobaltoan calcite composed by augiteNice and well prepared specimen. 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,