Acanthodii

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Acanthodii

an order of placoderm fossil fish, whose members bear spines along the anterior margin of the fins.
References in periodicals archive ?
2016) reporting the Orcadian Basin acanthodian, Diplacanthus crassisimus Duff 1842 in the Moroch Beds.
A fin spine identified as belonging to the acanthodian Ankylacanthus incurvus (NBMG 11976) (see Burrow et al.
But armed with new data on what the earliest sharks and bony fishes looked like, Coates and colleagues re-examined fossils of Acanthodes bronni, the best-preserved acanthodian species.
In addition, acanthodian fish scales and a portion of a fin spine, and numerous actinopterygian and sarcopterygian fish scales and tips of actinopterygian teeth from the MNSC were identified by Kenaga and Sellepack (1995).
These substages correspond to the acanthodian zones established by Valiukevicius [5].
Also interesting are the results of a close study of the acanthodian scales within the excrement.
Don and Eldon collected skull roofs of haplolepidid fishes and a fin-spine of a small acanthodian fish (Gyracanthus) that Don later described in detail (Baird 1962a, 1978a).
More juvenile dipnoan tooth plates as well as acanthodian scales and conodonts were obtained from a new sample.
According to a report in National Geographic News, the specimen is of a 415-million-year-old Ptomacanthus, which is only the second known example of a braincase from an Acanthodian, a long-extinct group of fossil fish.