Adam's Early / Lower Devonian
- aguion formation
- area de bonar
- assa
- assie de nkhaila member
- athyrid
- athyrida
- atrypa
- atrypa oklahomensis
- atrypa reticularis
- atrypid
- atrypida
- becraft
- becraft formation
- becraft mountain
- birdsong formation
- bivalve
- bivalvia
- black cat mountain
- blastoid
- bois darc formation
- bolivia
- bryozoa
- cephalopod
- cephalopoda
- clarita
- coal county
- coelospira
- coelospira dichotoma
- coladilla formation
- colle
- colorado quarry
- concinnispirifer
- cordillera cantabrica
- costellispirifer
- costellisprifer concinnus
- crenulipora
- crenulipora difformis
- cryptoschisma
- cryptoschisma schultzii
- cryyptoschisma
- cuninulus
- cuninulus assaensis
- cyrtina
- cyrtina dalmani
- devon
- discomyorthis
- discomyorthis oblata
- draa
- early devonian
- emsian
- england
- erfoud
- fenestella
- fenestellid
- fenestrata
- ferronia
- ferronia subspeciosa
- glenerie limestone
- goniatite
- goniatites
- gypidula
- gypidula galeata
- haragan formation
- helderberg
- helderberg group
- kalkberg
- kalkberg formation
- la vid group
- leon
- leptaena
- leptaena acuticuspidata
- leptaena rhomboidalis
- leptotrypella
- levenea
- levenea subcarinata
- levenea subcarinata pumilis
- lochkovian
- lower devonian
- machaeraria
- machaeraria formosa
- megakozlowskiella
- megakozlowskiella perlamellosa
- meristella
- meristella atoka
- meristella laevis
- metacryphaeus
- metacryphaeus venustus
- mimosphinctes
- mollusc
- mollusca
- morocco
- nautiloid
- new york
- oklahoma
- orthid
- orthida
- orthocerid
- orthostrophia
- orthostrophia parva
- panenka
- parsons
- pentamerid
- pentamerida
- pentremitidea
- pentremitidea archiaci
- phacopid
- phacopida
- plicathyris
- plicathyris ezquerrai
- polypora
- polypora lilia
- pragian
- quadriloba
- quadriloba colletti
- ranees group
- reedops
- rhynchonellid
- rhynchonellida
- rhynchospirina
- rhynchospirina globosa
- sabaro
- saltern bay
- saltern cove
- schizophoria
- schizophoria multistriata
- schoharie
- spain
- speriferida
- sphaerirhynchia
- sphaerirhynchia lindenensis
- spiriferid
- sprifer
- strophomenata
- strophomenida
- strophonella
- strophonella lineata
- tabulata
- tennessee
- thamniscus
- trepostomata
- trepostome
- trilobite
- uncinulus
- uncinulus pyramidatus
- usa
- yeraifa formation
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