Bony fish (10) | ![]() |
Cartilaginous fish (1) | ![]() |
Ray (153) | ![]() |
Sardine (22) | ![]() |
Shark (105) | ![]() |
Soft-finned fish (327) | ![]() |
Spiny-finned fish (326) | ![]() |
and spiny fishes that gave rise to the amphibians of the Carboniferous were being replaced by true bony fish.
The Lobe-finned fish were more common during the Devonian than the Ray fins but largely died out.
The coelacanth and a few species of lungfish are the only Lobe-finned fishes left today. Lobe-finned fishes had fleshy pectoral
and pelvic fins articulating to the shoulder or pelvis by a single bone (humerus or femur)
Lobe-finned fishes are accepted the ancestors of all tetrapods. Plants which had begun colonizing the land during the Silurian period continued to make evolutionary progress during the Devonian.
Early tetrapods probably evolved from Lobe-finned fishes able to use their muscular fins to take advantage of the predator-free and food-rich environment of the new wetland ecosystems.
Dated from the mid-Devonian this fossil creature is considered to be the link between the lobe-finned fishes and early amphibians.
and other freshwater crustaceans but also on small vertebrates including the lungfish frogs and small turtles that are preserved with it in the Two Tree Site fossil deposit.
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