Eusthenopteron
Eusthenopteron is an extinct lobe-finned fish from the Late Devonian period, roughly 385 million years ago.
Its limb-like fins with bone structures resembling those of terrestrial vertebrates make it a key specimen in understanding the evolutionary transition from fish to four-legged land animals.
Fossils were first discovered in Quebec.
Preserved ancient organism
- DevonianGeologic period, 419-359 million years ago
- QuebecFrench-speaking Canadian province
- specimenIndividual for examination
- excavationAct of unearthing
sediment · shale · stratigraphy · carbon-dating · petrified · imprint · paleobotany · geology
Primordial fish still swimming
- lungfishFish that breathes air
- pectoralOf the chest
- pelvicOf the hip girdle
- humerusUpper arm's long bone
radius · ulna · lobed · paired fins · appendage
Origin point of descendants
- descentDownward slope or lineage
- ancestryFamily line of descent
- lineageDescent from progenitors
- cladisticsClassification by common descent
homology · evolutionary history · classification · taxonomic · related species · divergence · branching · monophyletic
Armed entry by soldiers
- intermediateBetween two levels
- missing linkUndiscovered ancestral connection
- limb developmentFormation of extremities
- weight-bearingSupporting physical mass
fossil
Preserved ancient organism
- DevonianGeologic period, 419-359 million years ago
- QuebecFrench-speaking Canadian province
- specimenIndividual for examination
excavation · sediment · shale · stratigraphy · carbon-dating · petrified · imprint · paleobotany · geology · reconstruction
coelacanth
Primordial fish still swimming
common ancestor
Origin point of descendants
cladistics · homology · evolutionary history · classification · taxonomic · related species · divergence · branching · monophyletic · sister group
land invasion
Armed entry by soldiers
- intermediateBetween two levels
- missing linkUndiscovered ancestral connection
- limb developmentFormation of extremities
- Lobe-Finned Fish
- Transitional FossilsArchaeopteryx, Australopithecus, Homo erectus, Ardipithecus, Lucy
- ancient tetrapodstetrapod, tetrapods