Onychodus
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Onychodus is a genus of prehistoric lobe-finned fish which lived during the Devonian Period. It is one of the best known of the group of onychodontiform fishes. Scattered fossil teeth of Onychodus wer
Lower jaw of O. sigmoides
Onychodus reconstruction.
Phylogenetic position of Onychodus in lobe-finned fishes, representing the Onychodontiformes. From top to bottom: Dipnoi– Lungfishes, Porolepiformes– An order of lobe-finned fishes, Actinistia– Coelacanths, higher-Sarcopterygii– More derived forms of lobe-finned fishes.
Tooth whorl from Seneca Stone Quarry
Devonian
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The Devonian is a geologic period and system of the Paleozoic era during the Phanerozoic eon, spanning 60.7 million years from the end of the preceding Silurian period at 419.62 million years ago, to
Onychodus
…Onychodus (, from Greek meaning "claw-tooth") is a genus of prehistoric lobe-finned fish which lived during the Devonian Period (Eifelian - Famennian stages, around 374 to 397 million years ago). It is one of the best known of the group of onychodontiform fishes. Scattered…
The rocks of Lummaton Quarry in Torquay in Devon played an early role in defining the Devonian Period
Prototaxites milwaukeensis, the only known member of an unknown kingdom of life, from the Middle Devonian of Wisconsin
The Devonian Period marks the beginning of extensive land colonization by plants. With large land-dwelling herbivores not yet present, large forests grew and shaped the landscape.
Lycopod axis (branch) from the Middle Devonian of Wisconsin