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Middle Ordovician

Hierarchy:Phanerozoic Paleozoic  Ordovician
   Middle Ordovician
Classification:Epoch (as per International Commission on Stratigraphy)
Top:458.4 ± 0.9 Ma
Base:470.0 ± 1.4 Ma
Preceeds:Late Ordovician Sandbian
Follows:Early Ordovician Floian
Primary Divisions:DarriwilianDapingian
Fossil Record

Data via PaleoBioDB

Taxa Count Key
First appearance
First appearance and extinction
Related precursors
KingdomPhylumClassTaxa Count
AnimaliaAnnelida Polychaeta17
AnimaliaArthropoda Branchiopoda2
AnimaliaArthropoda Cephalocarida1
AnimaliaArthropoda Malacostraca6
AnimaliaArthropoda Merostomata1
AnimaliaArthropoda Ostracoda225
AnimaliaArthropoda Trilobita1,470
AnimaliaBrachiopoda Chileata7
AnimaliaBrachiopoda Craniata17
AnimaliaBrachiopoda Kutorginata2 ✝
AnimaliaBrachiopoda Lingulata224
AnimaliaBrachiopoda Obolellata2
AnimaliaBrachiopoda Rhynchonellata716
AnimaliaBrachiopoda Strophomenata631
AnimaliaBrachiopoda Tommotiida1 ✝
AnimaliaBryozoa Gymnolaemata7
AnimaliaBryozoa Stenolaemata351
AnimaliaChordata Holocephali2
AnimaliaCnidaria Anthozoa163
AnimaliaCnidaria Cubozoa1
AnimaliaCnidaria Hydrozoa5
AnimaliaCnidaria Scyphozoa12
AnimaliaCnidaria Staurozoa4
AnimaliaEchinodermata Asteroidea26
AnimaliaEchinodermata Crinoidea163
AnimaliaEchinodermata Echinoidea7
AnimaliaEchinodermata Holothuroidea8
AnimaliaEchinodermata Ophiuroidea5
AnimaliaHemichordata Pterobranchia20
AnimaliaMollusca Bivalvia263
AnimaliaMollusca Cephalopoda657
AnimaliaMollusca Gastropoda706
AnimaliaMollusca Monoplacophora1
AnimaliaMollusca Polyplacophora28
AnimaliaMollusca Scaphopoda4
AnimaliaPorifera Calcarea9
AnimaliaPorifera Demospongiae24
AnimaliaPorifera Hexactinellida52
BacteriaCyanobacteria Cyanophyceae6
ChromistaForaminifera Monothalamea7
ChromistaForaminifera Tubothalamea7
ChromistaMyzozoa Dinophyceae2
ChromistaRadiozoa Polycystina33
PlantaeChlorophyta Chlorophyceae2
PlantaeChlorophyta Ulvophyceae15
PlantaeRhodophyta Florideophyceae3
PlantaeRhodophyta Rhodophyceae1
PlantaeTracheophyta Magnoliopsida2

Geologic Events

Event NameTypeAgeArea
Caledonian orogeny (concludes)Orogeny~505 - ~400 MaEurope

Overview of geological time

List all geological events
Mineral and/or Locality  
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