New information onBrindabellaspis stensioiYoung, 1980, highlights morphological disparity in Early Devonian placoderms [PDF]
Royal Society Open Science, 2018 Acid-prepared specimens of the placoderm Brindabellaspis stensioi (Early Devonian of New South Wales, Australia) revealed placoderm endocranial anatomy in unprecedented detail.
Benedict KING +2 more
exaly +3 more sources
A well-preserved ‘placoderm’ (stem-group Gnathostomata) upper jaw from the Early Devonian of Mongolia clarifies jaw evolution [PDF]
Royal Society Open Science, 2023 The origin of jaws and teeth remains contentious in vertebrate evolution. ‘Placoderms’ (Silurian-Devonian armoured jawed fishes) are central to debates on the origins of these anatomical structures.
Martin D. Brazeau +7 more
doaj +2 more sources
Squamation and scale morphology at the root of jawed vertebrates [PDF]
eLife, 2022 Placoderms, as the earliest branching jawed vertebrates, are crucial to understanding how the characters of crown gnathostomes comprising Chondrichthyes and Osteichthyes evolved from their stem relatives.
Yajing Wang, Min Zhu
doaj +2 more sources
A Bayesian approach to dynamic homology of morphological characters and the ancestral phenotype of jawed vertebrates [PDF]
eLife, 2020 Phylogenetic analysis of morphological data proceeds from a fixed set of primary homology statements, the character-by-taxon matrix. However, there are cases where multiple conflicting homology statements can be justified from comparative anatomy.
Benedict King, Martin Rücklin
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Biomechanical analyses of pterygotid sea scorpion chelicerae uncover predatory specialisation within eurypterids [PDF]
PeerJ, 2022 Eurypterids (sea scorpions) are extinct aquatic chelicerates. Within this group, members of Pterygotidae represent some of the largest known marine arthropods.
Russell D. C. Bicknell +5 more
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A large Middle Devonian eubrachythoracid ‘placoderm’ (Arthrodira) jaw from northern Gondwana [PDF]
Swiss Journal of Palaeontology, 2021 For the understanding of the evolution of jawed vertebrates and jaws and teeth, ‘placoderms’ are crucial as they exhibit an impressive morphological disparity associated with the early stages of this process.
Melina Jobbins +3 more
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Extreme lower jaw elongation in a placoderm reflects high disparity and modularity in early vertebrate evolution [PDF]
Royal Society Open ScienceJaws are a key vertebrate feature that arose early in our evolution. Placoderms are among the first jawed vertebrates; their fossils yield essential knowledge about the early diversification of gnathostome feeding strategies, diets and modularity ...
Melina Jobbins +6 more
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Reappraisal of the Silurian placoderm Silurolepis and insights into the dermal neck joint evolution [PDF]
Royal Society Open Science, 2019 Silurolepis platydorsalis, a Silurian jawed vertebrate originally identified as an antiarch, is here redescribed as a maxillate placoderm close to Qilinyu and is anteroposteriorly reversed as opposed to the original description.
You-an Zhu, Jing Lu, Min Zhu
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A new ‘acanthothoracid’ placoderm from the Arctic Canada (Early Devonian) and its bearing on the evolution of jaws and teeth [PDF]
Royal Society Open ScienceThe origin of jaws and teeth represents one of the most formative episodes in our own evolutionary history. However, this event is poorly understood because of a lack of detailed knowledge of key lineages, including the ‘acanthothoracid’ placoderms ...
Sébastien Olive +5 more
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Confocal Characterization of Intestinal Dendritic Cells from Myxines to Teleosts [PDF]
Biology, 2022 Dendritic cells (DCs) are antigen-presenting cells (APCs) that regulate the beginning of adaptive immune responses. The mechanisms of tolerance to antigens moving through the digestive tract are known to be regulated by intestinal DCs.
Alessio Alesci +9 more
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