Results 61 to 70 of about 1,690 (206)
PLoS ONE, 2017 Placoderms are considered as the first jawed vertebrates and constitute a paraphyletic group in the stem-gnathostome grade. The acanthothoracid placoderms are among the phylogenetically most basal and morphologically primitive gnathostomes, but their ...
Vincent Dupret +3 more
doaj +1 more source
Testing models of dental development in the earliest bony vertebrates, Andreolepis and Lophosteus [PDF]
, 2012 Theories on the development and evolution of teeth have long been biased by the fallacy that chondrichthyans reflect the ancestral condition for jawed vertebrates.
Hector Botella +9 more
core +1 more source
Placoderms and the evolutionary origin of teeth: a comment on Rücklin & Donoghue (2015)
Biology Letters, 2016 The extinct Devonian placoderms (armoured jawed fishes) [[1][1],[2][2]] are central to the question of tooth origins, because some have denticulate ‘toothplates’ within the mouth cavity.
C. Burrow, Yuzhi Hu, Gavin Young
semanticscholar +1 more source
New finds of fishes in the lower uppermost Famennian (Upper Devonian) of Сentral Russia and habitats of the Khovanshchinian vertebrate assemblages [PDF]
Estonian Journal of Earth Sciences, 2018 New vertebrate finds from the Khovanshchinian Regional Stage (lower uppermost Famennian, Upper Devonian) made an important contribution to our knowledge of the composition and distribution of vertebrate assemblages in Central Russia.
Oleg A. Lebedev +3 more
doaj +1 more source
Exceptional soft tissues preservation in a mummified frog-eating Eocene salamander [PDF]
, 2017 Fossils are almost always represented by hard tissues but we present here the exceptional case of a three-dimensionally preserved specimen that was ‘mummified’ (likely between 40 and 34 million years ago) in a terrestrial karstic environment.
Laurin, Michel +2 more
core +2 more sources
Fish Scales: A Multifunctional Biomaterial from Nature
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.Fish scales demonstrate nature's solution to impact protection through overlapping multilayered architecture. This biological design combines mineralized surfaces with collagen networks to achieve both flexibility and fracture resistance. The structural principles inspire advanced protective materials and biomedical implants, where damage tolerance ...
Liyao Dong, Xiaojie Sun, Xiguang Chen
wiley +1 more source
The Anatomical Record, Volume 309, Issue 4, Page 864-911, April 2026.Abstract The trigeminus nerve (cranial nerve V) is a large and significant conduit of sensory information from the face to the brain, with its three branches extending over the head to innervate a wide variety of integumentary sensory receptors, primarily tactile.
Juri A. Miyamae +4 more
wiley +1 more source
The hyoid arch and braincase anatomy of Acanthodes support chondrichthyan affinity of ‘acanthodians’
, 2015 Solving the evolutionary relationships of the acanthodians is one of the key problems in reconstructing ancestral anatomical conditions for the jawed vertebrates (gnathostomes).
Brazeau, MD, de Winter, V
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The relationships of antiarchs (Devonian placoderm fishes)—evidence supporting placoderm monophyly
Journal of Vertebrate Paleontology, 2008 A recent analysis of the vascularization of the pectoral fin in antiarchs indicated that they resembled jawless osteostracans rather than other jawed vertebrates, thereby challenging the monophyly of the class Placodermi. Examination of the evidence proposed to support this new hypothesis shows misinterpretation of well-established morphology in a ...
openaire +1 more source
The Anatomical Record, Volume 309, Issue 3, Page 550-602, March 2026.Abstract Actinopterygii is a major extant vertebrate group, but limited data are available for its earliest members. Here we investigate the morphology of Devonian actinopterygians, focusing on the lower jaw. We use X‐ray computed tomography (XCT) to provide comprehensive descriptions of the mandibles of 19 species, which span the whole of the Devonian
Ben Igielman +11 more
wiley +1 more source