Antineosteus
Extinct genus of homostiid arthrodire
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Antineosteus is an extinct genus of homostiid arthrodire from the Emsian, Early Devonian Kess-Kess Mounds, in the eastern Anti-Atlas Mountains, Morocco,[1] and the Barrandian area of the Czech Republic.[2]
| Antineosteus Temporal range: | |
|---|---|
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| Known materials and size comparison of Antineosteus rufus | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | †Placodermi |
| Order: | †Arthrodira |
| Suborder: | †Brachythoraci |
| Family: | †Homostiidae |
| Genus: | †Antineosteus Lelièvre, 1984 |
| Type species | |
| Antineosteus lehmani Lelièvre, 1984 | |
| Species | |
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A. lehmani Lelièvre, 1984 | |
Description
Antineosteus lehmani is rather fragmentary, known from a left anterior dorsolateral plate, a left paranuchal plate, and an inferognathal.[1][2]
Antineosteus rufus is known from a nearly-complete right head shield plate, and a right anterior dorsolateral plate.[2] A. rufus is estimated to exceed 3 m (9.8 ft), from measuring the plates with the ones from better-preserved, related taxa.[2]
Diet
Antineosteus, like many other members of Homostiidae, lacked bladed dentition on their jaws, and was large in size. These traits all in one animal support a planktivorous lifestyle, like baleen whales, or the whale shark, as supported by Denison, 1978, suggesting similar lifestyles for arthrodires like Homostius, making it reasonable for many homostiids to be suspension-feeders like the later Titanichthys.[2]