30683 - Well Preserved 1.15 Inch Cyphaspis (Otarion) cf. boutscharafinense Devonian Trilobite Study This variety of quarz is

This variety of quarz is called chalcedony

Environments: marine (62 collections)

this specimen presents an additional scientific interest given the classification difficulty

Aragonite is a carbonate mineral

Agee and H

30683 - Well Preserved 1.15 Inch Cyphaspis (Otarion) cf. boutscharafinense Devonian Trilobite Study This variety of quarz isOtarion, Zenker 1833 (trilobite) Trilobita Proetida Aulacopleuridae Synonyms: Conoparia Hawle and Corda 1847 (no. 155231), Otarionella Weyber 1965 (no. 21276) Parent taxon: Aulacopleuridae according to P. A. Jell and J. M. Adrain 2003 See also Jell and Adrain 2002, Sepkoski 2002, Thomas and Owens 1978 and Whittington 1941 Sister taxa: Aulacopleura, Aulacopleurinae, Coignouina, Cyphaspides, Dixiphopyge, Goodsiraspis, Maurotarion, Namuropyge,