Diplognathus
| Diplognathus Temporal range: Late Famennian
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| Reconstructed as hadrosteids | |
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Gross, 1932
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Diplognathus
Newberry, 1878
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| Type species | |
| Diplognathus mirabilis Newberry, 1878
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Diplognathus is a genus of arthrodire placoderm from the Late Famennian Cleveland Shales of Late Devonian Ohio, known only from incomplete fragments of jaws and skulls.[1] What fragments are known suggest that the living animals were large-eyed piscivores with weak, but widely gaping jaws. D. mirabilis is thought to be fairly large, with infragnathals up to 45 centimeters in length. The second species, D. larfargei, was much smaller, with inferognathals averaging about 4 centimeters in length.[2]
In 1967, Obruchev placed this genus within Hadrosteidae, on the basis of how the two genera have similar denticle ("teeth") patterns of the inferognathals, though, Denison (1978) contests this placement, preferring to leave the taxon as arthrodira incertae sedis.
References
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