sedimentary

Trilobite Fossil (Flexicalymene)

Flexicalymene ouzregui

AI-generated identification · may be incorrect

Hardness: 3-4 (matrix usually limestone or shale); Color: Earthy brown, tan, and orange-tinted; Luster: Dull or matte; Structure: Segmented exoskeleton with cephalon, thorax, and pygidium segments.

Hardness: 3-4 (matrix usually limestone or shale)
Color: Earthy brown, tan, and orange-tinted
Luster: Dull or matte

Identified May 10, 2026More sedimentary →

Explore Trilobite Fossil (Flexicalymene) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 3-4 (matrix usually limestone or shale); Color: Earthy brown, tan, and orange-tinted; Luster: Dull or matte; Structure: Segmented exoskeleton with cephalon, thorax, and pygidium segments.

Formation & geological history

Formed during the Ordovician period (approx. 450 million years ago) through the process of permineralization in a shallow marine environment.

Uses & applications

Educational resources, museum displays, and a staple for private fossil collections. Not used in industry or construction.

Geological facts

Trilobites are extinct marine arthropods. They were among the most successful of all early animals, roaming the oceans for over 270 million years before the Permian extinction.

Field identification & locations

Identified by its distinctive three-lobed, segmented body. Common in the Anti-Atlas Mountains of Morocco. Collectors should look for symmetry and lack of artificial 'carved' features.