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Pan-Biota
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Eupelycosauria
Ophiacodontidae
Nopsca 1923
Clepsydrops
Echinerpeton intermedium
Archaeothyris
Ophiacodontidae
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Details about
Ophiacodontidae
Nopsca 1923
Subgroups
Clepsydrops
Echinerpeton intermedium
Archaeothyris
External Sources
EoL
Ophiacodontidae
GBIF
Ophiacodontidae
IRMNG
Ophiacodontidae
OTOL
Ophiacodontidae
PaleobioDB
Poliosauridae
Ophiacodontidae
Clepsydropidae
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