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Calymenina
-Prognathodon currii (Christiansen & Bonde
a partial skeleton
The rock formed from impact ejecta which was later buried by newer impacts and lithified due to the pressure from overlying layers
30309 - Top Beautiful 2.10 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Niobella lindstroemi CalymeninaCrotalocephalina 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, Chiozoon, Contracheirurus,