Period Cm

Cambrian

538.8000 – 486.8500 Ma

The Cambrian is the first geological period of the Paleozoic Era and the Phanerozoic Eon. The Cambrian lasted 51.95 million years from the end of the preceding Ediacaran period 538.8 Ma to the beginning of the Ordovician Period 486.85 Ma.

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Cambrian
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© Scotese, Christopher R.; Vérard, Christian; Burgener, Landon; Elling, Reece P.; Kocsis, Ádám T. · CC BY 4.0
News 9
Remarkable Eoceras shaanxiense Fossils Rewrite Cephalopod Evolution
Researchers have identified tiny fossils from the Shuijingtuo Formation (Cambrian Stage 3) of South China that could transform our understanding of cephalopod evolution. The newly described species, Eoceras shaanxiense, provides the oldest known evidence of a primordial siphuncle, a crucial anatomical feature that enabled cephalopods to regulate buoyancy and eventually become some of the oceans'
03/08/2026 everythingdinosaur
520-Million-Year-Old Fossil from China Fills Gap in Evolutionary History of Cephalopods
520-Million-Year-Old Fossil from China Fills Gap in Evolutionary History of Cephalopods
Paleontologists have identified the earliest-known cephalopod equipped with a siphuncle -- a tubular extension of the mantle found in shelled cephalopods -- pushing back the fossil record of this key evolutionary feature to the Early Cambrian, roughly 520 million years ago. The post 520-Million-Year-Old Fossil from China Fills Gap in Evolutionary History of Cephalopods appeared first on Sci.News: Breaking Science News.
30/07/2026 sci-news
Ancient Sea Creature Pushes Back Origins of Spider Fangs to 518 Million Years Ago
Ancient Sea Creature Pushes Back Origins of Spider Fangs to 518 Million Years Ago
Urokodia aequalis, an early Cambrian marine predator from the Chengjiang biota of China, preserves the earliest known evidence of chelicerae -- the pincer-like structures that later evolved into the fangs of spiders and the pincers of scorpions. The post Ancient Sea Creature Pushes Back Origins of Spider Fangs to 518 Million Years Ago appeared first on Sci.News: Breaking Science News.
01/07/2026 sci-news
Complex Colonial Life Was Already Thriving during Cambrian Explosion
Complex Colonial Life Was Already Thriving during Cambrian Explosion
Tiny colonial animals called bryozoans were long thought to have appeared tens of millions of years after the Cambrian explosion. The post Complex Colonial Life Was Already Thriving during Cambrian Explosion appeared first on Sci.News: Breaking Science News.
03/06/2026 sci-news
Une découverte en Chine bouscule l’histoire d’étranges animaux vieux de 520 millions d’années
A discovery in China shakes up the story of strange animals dating back 520 million years
Discreet but omnipresent in today's oceans, bryozoans hide a much older history than previously thought. Exceptional fossils discovered in China show that 520 million years ago, these colonial animals were already complex structures, fully...
03/06/2026 futura-terre ⚙ Auto-translated
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Parent interval
Paleozoic Era
Sub-intervals 4
Terreneuvian
538.8000 – 521.0000
Series 2
521.0000 – 506.5000
Miaolingian
506.5000 – 497.0000
Furongian
497.0000 – 486.8500