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FOSSILS. { Between the Rock }
Phylum
Class
Order
(mya) million years ago
^
541
485.4
443.8
419.2
358.9
298.9
251.902
201.3
145
66
23.03
2.58
Arthropods: 540 mya – present
Trilobita: 521 - 251.9 mya
Trilobites: 521 - 251.9 mya
Brachiopoda: 541 mya – present
Brachiopods: 485.4 mya – present
Rhynchonellida: 443.8 mya - present
Chordates: 535 mya – present
Chondrichthyes: 430 mya - present
Striatolamia: 61.7 - 10.3 mya
Reptilia: 312 mya - present
Dinosauria: 233.23 - 66 mya
Cnidaria: 580 mya – present
Anthozoa: 570 mya - present
Scleractinia: 247.2 mya - present
Echinoderms: 541 mya – present
Crinoidea: 467.3 mya - present
Crinoid: 467.3 mya - present
Echinoidea: 485.4 mya - present
Urchins: 485.4 mya - present
Mollusca: 541 mya – present
Bivalves: 541 mya – present
Carditida: 541 mya – present
Gryphaea: 199.6 - 33.9 mya
Cephalopods: 497 mya – present
Ammonites: 409 - 66 mya
Belemnites: 234 - 66 mya
Gastropoda: 541 mya – present
Gastropods: 541 mya – present
Plantae: 1600 mya – present
Embryophyta: 425 mya - present
Tracheophytes: 425 mya - present
Porifera: 635 mya – present
Demospongiae: 635 mya - present
Sponges: 635 mya - present
Cambrian
Ordovician
Silurian
Devonian
Carboniferous
Permian
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
Quaternary