CAMBRIAN PERIOD Representatives of the marine fauna: 1 - jellyfish; 2 - sponges; 3–5, trilobites (3– Trilobita, 4– Paradoxi-, des, 5– Lusatiops); 6 - chiolnt Hyolithes; 7 - lockless brachiopods (Inarticulate);

CAMBRIAN PERIOD Representatives of the marine fauna: 1 - jellyfish; 2 - sponges; 3–5, trilobites (3– Trilobita, 4– Paradoxi-, des, 5– Lusatiops); 6 - chiolnt Hyolithes; 7 - lockless brachiopods (Inarticulate);

CAMBRIAN PERIOD Representatives of the marine fauna: 1 - jellyfish; 2 - sponges; 3–5, trilobites (3– Trilobita, 4– Paradoxi-, des, 5– Lusatiops); 6 - chiolnt Hyolithes; 7 - lockless brachiopods (Inarticulate);

Trilobites are famous not just because they were so beautifully functional, or because they happened to preserve so well. They’re known the world over because they were everywhere!

Yet another Today I learned :)