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 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | †Placodermi |
| Order: | †Arthrodira |
| Suborder: | †Brachythoraci |
| Family: | †Homostiidae |
| Genus: | †Antineosteus Lelièvre, 1984 |
| Type species | |
| Antineosteus lehmani Lelièvre, 1984
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| Species | |
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A. lehmani Lelièvre, 1984 | |
Description
editAntineosteus lehmani is rather fragmentary, known from a left anterior dorsolateral plate, a left paranuchal plate, and an inferognathal.[1][2]
A. 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
editAntineosteus, 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]
Phylogeny
editAntineosteus is a homostiid, closest related to Homostius.
Taxonomy shown here is based on "FISH FROM THE EMSIAN OF ARAGÓN".[3]
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References
edit- ^ a b Rücklin, Martin; Lelièvre, Hervé; Klug, Christian (2018-11-01). "Placodermi from the Early Devonian Kess-Kess mounds of Hamar Laghdad, Southern Morocco". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen: 301–306. doi:10.1127/njgpa/2018/0780.
- ^ a b c d e Vaškaninová, V.; Kraft, P. (2014-06-09). "The largest Lower Devonian placoderm - Antineosteus rufus sp. nov. from the Barrandian area (Czech Republic)". Bulletin of Geosciences: 635–644. doi:10.3140/bull.geosci.1450. ISSN 1802-8225.
- ^ Mark-Kurik, Elga; Carls, Peter (2021-03-03). "Tityosteus, a marine fish (Arthrodira, Homostiidae) from the Emsian of Aragón, Spain, and its distribution". Spanish Journal of Palaeontology. 19 (2): 139–144. doi:10.7203/sjp.19.2.20528. ISSN 2660-9568.