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An introduction to the Extinct Life Pictorial Encyclopedia along with some statistics regarding what information is available

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Opabinia C Opadothrips Opalia Opaliopsis Opallionectes P Opeamorphus
Opechinus Opella Opellianus Operchaliosteus Operchallosteus Opercularia
Operculina Operculinoides Opertochasma Opertorbitolites Opertum Opetiala
Opetionella Opetiosaurus Opheoceratites Opheodrys Ophiacantha Ophiacodon P C
Ophiactis Ophiarachna Ophiaulax Ophiaulaxoides Ophicardelus Ophiceras
Ophiderpeton P Ophidioceras Ophidion Ophidium Ophigraptus Ophileta
Ophiletina Ophilyroceras Ophioceras Ophiochiton Ophiocnida Ophiocoma
Ophiocrinus Ophiocrossota Ophiocten Ophioderma Ophiodermella Ophiodesia
Ophiodon Ophioflabellum Ophioglypha Ophioglyphoida Ophiohybris Ophiolancea
Ophiolepis Ophioliassica Ophioma Ophiomorpha Ophiomorphus Ophiomusium
Ophiomys Ophiomyxa Ophionautilus Ophiopetra Ophiopeza Ophiopholis
Ophiopinna Ophiopolytretus Ophiopsammus Ophiopsis Ophiorhabdoceras Ophioscolex
Ophiosema Ophiosmilax Ophiothela Ophiothrix Ophiotitanos Ophiotrapezium
Ophiotrigonum Ophioxenikos Ophiozonella Ophipseudopus Ophiraphidites Ophisauriscus
Ophisaurus Ophismoblatta Ophisthoproctus Ophisurus Ophiura Ophiuraster
Ophiurella Ophiuricoma Ophiurina Ophiuriocoma Ophiurites Ophiurocrinus
Ophryaster Ophryastes Ophryastites Ophryotrocha Ophrysia Ophrystoma
Ophthalmapseudes Ophthalmidium Ophthalmipora Ophthalmocoris Ophthalmoplax Ophthalmosaurus C
Ophthalmoxyela Opikatia Opikella Opikina Opilioacarus P Opiliotarbus
Opimaphora Opimaria Opimilda Opimocythere Opiotoptera Opiparifungivora
Opipeuter Opipeuterella Opiphyllum Opis Opisconidion Opiselleipon
Opismoblatta Opisoma Opisopneustes Opissaster Opisthias C Opisthocladus
Opisthocoelicaudia P C Opisthocoelus Opisthoctenodon Opisthodactylus Opisthomyzon Opisthonema
Opisthoparia Opisthophylax Opisthophyllum Opisthoplax Opisthopsalis Opisthoptera
Opisthornithopora Opisthotreta Opisthotrigonia Opisthotriton Opistopteryx Oplegnathus
Oplidactylapes Oplophorus Oplosaurus P Opoa Opolanka Oppelia
Oppelisiilia Oppelismilia Oppenheimiella Oppenheimopecten Oppilatala Oppites
Oppligera Opsanus Opsiclaenodon Opsiconidion Opsidiscus Opsieobuthus
Opsimasaphus Opsiocrinus Opsiomylacris Opsiosoryctocephalus Opsis Opsithrissops
Opsypharus Opter Opthalmosaurus C Optivus Optoturris Opularca
Oracanthus Oracardia Oradectes Orangemeryx Orangictis Orania
Oraniceras Orapaeus Orapauletes Orapia Orasius Orastrum
Oratoceras Oravaichnium Orbablattula Orbiasterocyathus Orbiblastus Orbicapitia
Orbicapitis Orbicella Orbicoelia Orbicoscinus Orbicula Orbiculatisinurostrum
Orbiculatisiurostrum Orbiculiforma Orbiculiformella Orbiculoidea Orbiculopecten Orbiculopora
Orbiculothyris Orbicyathellus Orbicyathus Orbigastrula Orbignya Orbignyana
Orbignyceras Orbignycoenia Orbignycrinus Orbignyella Orbignygyra Orbignyna
Orbignyopora Orbilabia Orbinaria Orbipora Orbiramus Orbirhynchia
Orbis Orbitammina Orbitaphis Orbitestella Orbithele Orbitoclypeus
Orbitocyclina Orbitoides Orbitokathina Orbitolina Orbitolinella Orbitolinopsis
Orbitolites Orbitoplax Orbitoproetus Orbitopsella Orbitremites Orbitulipora
Orbula Orbulina Orbulinoides Orca C Orcadia Orcanopterus
Orchesteropus Orchidea Orchimomys Orchonoceros Orcinus Orcofabella
Orcomimus Orcopsis Orculiella Ordinacrinus Ordinatus Ordinisabulo
Ordoceras Ordogeisonoceras Ordolagus Ordolestes Ordoniya Ordosaspis
Ordosemys Ordosia Ordosiodon Ordosoceras Ordovicia Ordovicina
Ordovizona Oreadella Oreamnos Oreaspis Oreaster Orechina
Orecopia Orectochilus Orectodictya Orectoloboides Orectolobus Orectospira
Orecyta Oredezhosteus Oregonia Oregonites Oregonomys Oreinotherium
Oreisator Orelladjidaumo Orenburgella Orenburgia Oreochima Oreochromis
Oreodon C Oreodontoides Oreokora Oreolagus Oreonager Oreonagor
Oreonetes Oreophlebia Oreopholus Oreopithecus Oreopterella Oreopteron
Oreotalpa Oreoterebra Oreotragus Orephasma Orestia Orestiacanthus
Orestias Orestites Oretia Organoceras Orhomalus Oriadubitherium
Oribatella P Orichalcum Oricilla Orictocara Oridorsalis Orienicydnus
Oriensarctos Oriensellina Oriensictis Orienspterodon Orientalina Orientalla
Orientalomys Orientastromus Orientella Orienticyathus Orientina Orientisargus
Orientocylindrodon Orientolophus Orientospira Orientospirifer Orientothyris Orienturus
Orietalia Originicorizus Origoasilus Origostrophia Orinella Orinosaurus P
Oriocrassatella Oriomeryx Oriomphalus Orionastraea Orionina Orionoides
Oriostoma Oriskania Orithopsis Orithostella Oriundogutta Orkekeia
Orkoraptor P Orlinocyathus Orlovia Orlovicavina Orlovichthys Orloviella
Orlovirhynchia Ormastralium Ormathichnus Ormathops Ormenis Ormistonaspis
Ormistonella Ormistonia Ormistoniella Ormoceras Ormosia Ornamentaria
Ornamentaspis Ornamentifera Ornatanomalina Ornategulum Ornathiliabrilance Ornaticannula
Ornaticosta Ornaticostella Ornatifilum Ornatilabrilancea Ornatisaturnalis Ornatoclymenia
Ornatoleberis Ornatophyllum Ornatoporta Ornatoptygmatis Ornatoscyllium Ornatoserra
Ornatosinuitina Ornatospira Ornatothyrella Ornatothyris Ornatus Ornimegalonyx P
Ornithaptera Ornithaster Ornithella Ornithichnites Ornithocheirus P C Ornithodesmus P C
Ornithoformipes Ornithoidichnites Ornithoidipus Ornitholestes P C Ornitholithus Ornithomimipus P
Ornithomimoides P Ornithomimus P C Ornithopecten Ornithopodichnites Ornithopodichnus P Ornithoprion
Ornithopsis P Ornithorhynchus Ornithosoma Ornithostoma P Ornithosuchus C Ornithotarnocia
Ornithothyris Ornitocnemus Ornollus Ornopsis Ornothyrella Orobates
Orobias Orobitella Orocystites Orodes Orodromeus P C Orodus
Orogomys Orohippus Oroklambda Oromeryx Orometopus Oromycter
Orontium Oropentatoma Oropeza Orophocrinus P Orophodon Orophosaurus
Oropycnodus Oropyctis Ororaphidia Oroseris Orospheciom Orospira
Orostaurs Orovenator Orozoe Orphanaspis Orpodon Orrhodomala
Orria Orriella Orrorin Orsadesmus Orsobrachyceron Orstenotubulus
Orta Ortalestes Ortalis Ortelytron Orthacanthacris Orthacanthus P
Orthacodus Orthaeschnites Orthakrolophos Orthambonites Orthaspidoceras Orthaspidotherium
Orthaster Orthaulax Orthechinorhinus Orthechioceras Orthella Orthemis
Orthidiella Orthidium Orthiella Orthildaites Orthis Orthisocrania
Orthoarthrus Orthobairdia Orthocardium Orthocarina Orthoceltites Orthocera
Orthoceras Orthoceros Orthochetus Orthochilus Orthocidaris Orthoconorca
Orthoconus Orthocormus Orthocosta Orthocrinus Orthocyathus Orthocycloceras
Orthocyclus Orthocypris Orthodactylites Orthodactylus Orthodesma Orthodiscus
Orthodochmioceras Orthodon Orthodontiscus Orthodorsum Orthogarantiana Orthogeniops
Orthogenysuchus Orthogeomys Orthogonikleithrus Orthogoniosaurus Orthogonium Orthogonoceros
Orthogonocrinus Orthogonoides Orthogonophora Orthograptus Orthokarstenia Ortholina
Ortholites Ortholophodon Orthomerus P Orthomorphina Orthomyalina Orthomyctera
Orthomylacris Orthomys Orthonaria Orthonema Orthoneurites Orthonota
Orthonotacythere Orthonotella Orthonybyoceras Orthonychia Orthonyx Orthopelta
Orthophlebia Orthophlebioides Orthophyia Orthophyllum Orthopleura Orthopora
Orthopristis Orthoprosbole Orthopsis Orthopsocus Orthopteryx Orthoptychus
Orthoptyxis Orthoretiolites Orthorhynchula Orthorhynchuloides Orthorhyncula Orthorizoceras
Orthosaurus Orthoscytina Orthosphinctes Orthospira Orthospirifer Orthostomia
Orthostrophella Orthostrophia Orthostylus Orthosuchus Orthosurcula Orthotarbus
Orthotetella Orthotetes Orthotetina Orthotetoides Orthotheca Orthothetina
Orthothrix Orthothyris Orthotichia Orthotoma Orthotrigonia Orthotrinacria
Orthotropia Orthovertella Orthoxyela Orthoyoldia Orthriochiton Orthriocorisa
Orthrioscincus Orthrozanclus Orthurus Ortmannia Ortmannispongia Ortonella
Ortonia Ortotherium Oruatemanua Orulgania Orulganites Orusia
Orvikuina Orycterocetus Orycteropus Oryctoantiquus Oryctobaissodes Oryctoblattina
Oryctocara Oryctocare Oryctocarella Oryctocephalina Oryctocephalites P Oryctocephaloides
Oryctocephalops Oryctocephalus Oryctochlus Oryctoderma Oryctodiplax Oryctodromeus P
Oryctogma Oryctolagus Oryctometopus Oryctomya Oryctomylabris Oryctopterus
Oryctoscirtetes Oryctothemis Oryctoxyela Orygmaspis P Orygmatos Orygmatosphaeridium
Orygmophyllum Orygotherium Oryssus Oryx Oryzomys Oryzorictes

Name The name (genus) of the life form.
  Life Form Family Group  The family group to which the life form belongs.
This life form is Globally Extinct.  or  At least one species of this life form still exists today.  The 'cross' symbol indicates that this life form is globally extinct whereas the 'heart' symbol indicates that at least one species of this life form still exists today.
Pictures (artist illustrations and/or photos of fossils) are available in the detail page
Images of collectibles (scans/photos of cards, stickers, etc.) are available in the detail page

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