Arthrodira - Wikipedia
Arthrodira (Greek for "jointed neck") is an order of extinct armored, jawed fishes of the class Placodermi that flourished in the Devonian period before their sudden extinction, surviving for about 50 million years and penetrating most marine ecological niches. Arthrodires were the largest and most diverse of all groups of placoderms.
Armored Fish, Ancient Species, Fossil Record - Britannica
arthrodire, any member of an order of extinct, armoured, jawed fishes (placoderms) found in Devonian freshwater and marine deposits. (The Devonian period lasted from 416 million to 359 million years ago.) Early arthrodires, such as the genus Arctolepis, were well-armoured fishes with flattened bodies.
Dunkleosteus - Wikipedia
Dunkleosteus is an extinct genus of large arthrodire ("jointed-neck") fish that existed during the Late Devonian period, about 382–358 million years ago. It was a pelagic fish inhabiting open waters, and one of the first apex predators of any ecosystem. [ 1 ]
New findings in a 400 million-year-old Devonian placoderm shed …
2017年8月10日 · The extinct placoderms (‘armoured fishes’), with large dermal bones that were readily preserved as fossils, are the best-known and most diverse vertebrate group of the Devonian Period...
Devonian arthrodire embryos and the origin of internal ... - Nature
2009年2月26日 · Here we report the discovery of embryos in the Arthrodira inside specimens of Incisoscutum ritchiei from the Upper Devonian Gogo Formation of Western Australia 4 (approximately 380 million years...
The earliest known stem-tetrapod from the Lower Devonian of …
2012年10月23日 · Here, we describe a new finned stem-tetrapod, Tungsenia paradoxa gen. et sp. nov., from the Lower Devonian (Pragian, ∼ 409 mya) of Yunnan, China. The new taxon is ∼ 10 million years older than ...
Redescription of Yinostius major (Arthrodira: Heterostiidae) from …
2015年10月15日 · Yinosteus major is a heterostiid arthrodire (Placodermi) from the Lower Devonian Jiucheng Formation of Yunnan Province, south-western China. A detailed redescription of this taxon reveals the morphology of neurocranium and visceral side of skull roof.
Placoderms: Current Biology - Cell Press
2024年1月22日 · Arthrodires comprise at least 60% of all known placoderm species, with many distinct family groups based on the length and proportions of dermal armour, dermal plate ornaments and jaw bones. Early forms, such as Wuttagoonaspis (Figure 3), …
The first aspinothoracid arthrodire from the Late Devonian …
2020年4月15日 · Arthrodira is the most widely distributed and diversified subgroup of Placodermi, which itself is the most diverse major group of the Devonian jawed vertebrates. Arthrodires were traditionally...
A Devonian Fish Tale: A New Method of Body Length Estimation
2023年2月21日 · Dunkleosteus terrelli, an arthrodire placoderm, is one of the most widely recognized fossil vertebrates due to its large size and status as one of the earliest vertebrate apex predators. However, the exact size of this taxon is unclear due to its head and thoracic armor being the only elements of its body regularly preserved in the fossil record.