Endochondral bone in an Early Devonian ‘placoderm’ from Mongolia [PDF]
Nature Ecology & Evolution, 2020 Endochondral bone is the main internal skeletal tissue of nearly all osteichthyans—the group comprising more than 60,000 living species of bony fishes and tetrapods. Chondrichthyans (sharks and their kin) are the living sister group of osteichthyans and have cartilaginous endoskeletons, long considered the ancestral condition for all
Martin D. Brazeau +8 more
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A novel specimen-based mid-Paleozoic dataset of antiarch placoderms (the most basal jawed vertebrates) [PDF]
Earth System Science Data, 2023 Antiarcha data are essential to quantitative studies of basal jawed vertebrates. The absence of structured data on key groups of early vertebrates, such as Antiarcha, has lagged in understanding their diversity and distribution patterns.
Z. Pan +5 more
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Frontiers in Ecology and Evolution, 2022 Placoderms are an extinct group of early jawed vertebrates that play a key role in understanding the evolution of the gnathostome body plan, including the origin of novelties such as jaws, teeth, and pelvic fins.
Melina Jobbins +5 more
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Comment on "Exceptional preservation of organs in Devonian placoderms from the Gogo lagerstätte"
, 2023 Trinajstic et al., (Science, 16 September 2022, p. 1311-1314) describe exceptionally well-preserved organs in fossilized Devonian placoderms to infer the early evolution of the vertebrate heart.
Wang, Tobias +11 more
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A Middle-Late Devonian fish fauna from the Sierra de Perijá, western Venezuela, South America [PDF]
Fossil Record, 2002 A new Devonian fossil fish fauna from the region of Caño Colorado between the Rio Palmar and Rio Socuy, Sierra de Perijá, Venezuela, comes from two localities and several horizons within the Campo Chico Formation, dated on plants and spores as Givetian ...
G. C. Young, J. M. Moody
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Early Gnathostome Phylogeny Revisited: Multiple Method Consensus. [PDF]
PLoS ONE, 2016 A series of recent studies recovered consistent phylogenetic scenarios of jawed vertebrates, such as the paraphyly of placoderms with respect to crown gnathostomes, and antiarchs as the sister group of all other jawed vertebrates.
Tuo Qiao +4 more
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Reappraisal of the opercular anatomy in the ‘maxillate placoderms’ Entelognathus primordialis and Qilinyu rostrataReappraisal of the opercular anatomy in the ‘maxillate placoderms’ Entelognathus primordialis and Qilinyu rostrata [PDF]
Royal Society Open ScienceThe Silurian ‘maxillate placoderms’ Entelognathus primordialis and Qilinyu rostrata were previously described as possessing a single dermal operculum, suspended by either an opercular cartilage or an antiarch-like dermal articulation, respectively. Here,
Donglin He +3 more
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Известия высших учебных заведений: Геология и разведка, 2019 Three stages, namely Middle Devonian (I), Early Late Devonian (II) and Late Late Devonian (III), are distin-guished in the evolution of antiarchs (Placodermi, Antiarchi) in the Middle-Late Devonian of Northern Eurasia.
S. V. Moloshnikov
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Известия высших учебных заведений: Геология и разведка, 2019 The fragment of the skull cap of placoderm Livnolepis heckeri (Luksevics) from the Bilovo Formation (Famennian, Upper Devonian) near the Bilovo Village of Tver Region has been described.
S. V. Moloshnikov, V. V. Linkevich
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Evidence for Placoderms from the Mid-Palaeozoic Sandon Beds of North-western New South Wales, Australia [PDF]
, 2023 Armoured jawed fishes known as placoderms are a well-documented group with a fossil record spanning the Silurian to end-Devonian. They have a global distribution and a marked diversity within Devonian deposits of Australia. Despite their notable Gondwanan
Long, John A +4 more
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