Hadrosteus
| Hadrosteus Temporal range: Late Devonian: Frasnian,
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| File:Hadrosteus rapax.jpg | |
| Artist's reconstruction | |
Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | †Placodermi |
| Order: | †Arthrodira |
| Suborder: | †Brachythoraci |
| Clade: | †Eubrachythoraci |
| Clade: | †Pachyosteomorphi |
| Clade: | †Aspinothoracidi |
| Genus: | †Hadrosteus Gross, 1932 |
| Species | |
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Hadrosteus is an extinct monospecific genus of large arthrodire placoderm from the Late Frasnian (Late Devonian) Kellwasserkalk facies of Bad Wildungen, Germany.[1] It had large, double-pronged inferognathals (lower jawbones), and serrated edges along its mandible, strongly suggesting that it was a fish-eating predator. The head had a triangular snout, and the trunkshield was short, but high, with a median dorsal plate that was broader than wide. The average skull length is about 16 centimeters.[1]
Etymology
[edit | edit source]The type species Hadrosteus rapax means "Rapacious Strong-Bone".[1]
Phylogeny
[edit | edit source]Hadrosteus is a member of the clade Aspinothoracidi, which belongs to the clade Pachyosteomorphi, one of the two major clades within Eubrachythoraci. The cladogram below shows the phylogeny of Hadrosteus:[2]
References
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