Dinosaurs and Prehistoric Animals
Ogygopsis- Cambrian period, 541-485.4 million years ago

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Ogygopsis is a genus of trilobite from the Cambrian period, found mostly in the Burgess Shale, a huge fossil bed deposit area in the Canadian Rockies of British Columbia. It is the most common fossil in the Mt. Stephen fossil beds there, but rare in other Cambrian faunas. Its major characteristics are a prominent glabella with eye ridges, lack of pleural spines, a large spineless pygidium about as long as the thorax or cephalon, and its length: up to 12 cm.