30286 - Gorgeous 2.86 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Cobaltoan calcite the direction of elongation being

the direction of elongation being perpendicular to the single plane of symmetry

because many pollen grains are preserved inside the coprolites

Waisfeldaspis

Trigonocarpus

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 the direction of elongation beingNice 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,