Tyrannostorus

Tyrannostorus

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Tyrannostorus is an interactive shopping experience. Unlock your inner paleontologist.

06/25/2026

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06/23/2026

Let’s uncover the secrets of the mighty Gigantopithecus! 🦧
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Photos from Tyrannostorus's post 06/22/2026

A new GIANT Cleoniceras ammonite shell from Madagascar has arrived at the Tyrannostorus!

Cleoniceras is a rather involute, high-whorled hoplitid from the Lower to basal Middle Albian of Europe, Madagascar, and the Transcaspian region. The shell has a generally small umbilicus, arched to acute venter, and typically at some growth stage, falcoid ribs that spring in pairs from umbilical tubercles, usually disappearing on the outer whorls.
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Visit Tyrannostorus.com to receive yours today! We ship within the U.S.A.! 🇺🇸📦
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06/19/2026

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1816 West Baseline Road
Mesa, AZ
85202

Opening Hours

Monday 11am - 6pm
Tuesday 11am - 6pm
Wednesday 11am - 6pm
Thursday 11am - 6pm
Friday 11am - 6pm
Saturday 11am - 6pm
Sunday 11am - 5pm