Watsonosteus
| Watsonosteus Temporal range: Middle Devonian: Late Givetian, | |
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| Watsonosteus fossil specimen | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | †Placodermi |
| Order: | †Arthrodira |
| Suborder: | †Brachythoraci |
| Family: | †Coccosteidae |
| Genus: | †Watsonosteus Miles & Westoll, 1963 |
| Species | |
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| Synonyms | |
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Watsonosteus is an extinct genus of coccosteid arthrodire placoderm from the Late Givetian stage of the Middle Devonian period. Fossils are found in the Orkney Islands, Scotland. It was a small placoderm with a total body length of 57 cm (22 in), with the largest individuals reaching lengths of 1 m (39 in). It is one of the few arthrodires for which complete body fossils are known.