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Trilobita - Proetida - Aulacopleuridae
Brochantitie forms mainly in exposed areas where weathering prevents accumulation copper ions and enhancement in the acidity of water films
low shock stage
They lived during the Middle-Late Jurassic Epochs and serve as an biostratigraphic index fossil for that time period
Canada (Northwest Territories
08334 - Nicely Prepared 1.16 Inch Parahomalonotus planus Lower Devonian Graptolites Trilobita - Proetida - AulacopleuridaeExtremely rare species. Its size is enormous compared to the specimens that are usually found in this taxon. It has tiny restorations made on its shell during its meticulous and long preparation. Homalonotidae is a family of trilobites that lived from the Ordovician to the Devonian. They are characterised by a shovel like cephalon (head), and are closely related to the family Calymenidae. Parahomalonotus sp, Reed 1918 (trilobite) Trilobita Phacopida