Antineosteus

Antineosteus
Temporal range: Emsian
Known materials and size comparison of Antineosteus rufus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Placodermi
Order: Arthrodira
Suborder: Brachythoraci
Family: Homostiidae
Genus: Antineosteus
Lelièvre, 1984
Type species
Antineosteus lehmani
Lelièvre, 1984
Species

A. lehmani Lelièvre, 1984
A. rufus Vaškaninová and Kraft, 2014

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]

Description

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Antineosteus 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

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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]

Phylogeny

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Antineosteus is a homostiid, closest related to Homostius.

Taxonomy shown here is based on "FISH FROM THE EMSIAN OF ARAGÓN".[3]

Taemasosteus

Tityosteus

Antineosteus

Homostius

References

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  1. ^ 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.
  2. ^ 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.
  3. ^ 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.