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Early Ordovician

Hierarchy:Phanerozoic Paleozoic  Ordovician
   Early Ordovician
Classification:Epoch (as per International Commission on Stratigraphy)
Top:470.0 ± 1.4 Ma
Base:485.4 ± 1.9 Ma
Preceeds:Middle Ordovician Dapingian
Follows:Cambrian Furongian  Cambrian Stage 10
Primary Divisions:FloianTremadocian
Fossil Record

Data via PaleoBioDB


Taxa Count Key
First appearance
Extinction
First appearance and extinction
Related precursors
KingdomPhylumClassTaxa Count
AnimaliaAnnelida Polychaeta5
AnimaliaArthropoda Branchiopoda2
AnimaliaArthropoda Cephalocarida1
AnimaliaArthropoda Malacostraca5
AnimaliaArthropoda Ostracoda62
AnimaliaArthropoda Trilobita1,435
AnimaliaBrachiopoda Chileata2
AnimaliaBrachiopoda Craniata9
AnimaliaBrachiopoda Kutorginata4
AnimaliaBrachiopoda Lingulata140
AnimaliaBrachiopoda Obolellata2
AnimaliaBrachiopoda Rhynchonellata294
AnimaliaBrachiopoda Strophomenata143
AnimaliaBryozoa Gymnolaemata2
AnimaliaBryozoa Stenolaemata80
AnimaliaCnidaria Anthozoa22
AnimaliaCnidaria Cubozoa1
AnimaliaCnidaria Hydrozoa5
AnimaliaCnidaria Scyphozoa5
AnimaliaEchinodermata Asteroidea9
AnimaliaEchinodermata Crinoidea36
AnimaliaEchinodermata Holothuroidea1
AnimaliaEchinodermata Ophiuroidea3
AnimaliaHemichordata Pterobranchia2
AnimaliaMollusca Bivalvia130
AnimaliaMollusca Cephalopoda652
AnimaliaMollusca Gastropoda251
AnimaliaMollusca Monoplacophora1
AnimaliaMollusca Polyplacophora25
AnimaliaPorifera Calcarea2
AnimaliaPorifera Hexactinellida25
BacteriaCyanobacteria Cyanophyceae5
ChromistaForaminifera Monothalamea4
ChromistaForaminifera Tubothalamea8
ChromistaMyzozoa Dinophyceae2
ChromistaRadiozoa Polycystina8
PlantaeChlorophyta Chlorophyceae2
PlantaeChlorophyta Ulvophyceae5
PlantaeRhodophyta Florideophyceae2
PlantaeRhodophyta Rhodophyceae1
PlantaeTracheophyta Magnoliopsida1
 

Geologic Events

Event NameTypeAgeArea
Caledonian orogeny (concludes)Orogeny~505 - ~400 MaEurope
Ross orogeny (concludes)Orogeny~550 - ~480 MaAntarctica


Overview of geological time

List all geological events
 
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