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30236 - Top Beautiful 2.81 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Hexanchus It is the rostral bone

USD144.25 USD168.25
SKU 38596272685
4.6

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Description

It is the rostral bone of the giant sawfish Onchopristis numidus

one of the three most common naturally occurring crystal forms of calcium carbonate

FeO/MnO=26-41)

Tooth 11: 49 mm (1

30236 - Top Beautiful 2.81 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Hexanchus It is the rostral boneNice 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,

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