Results 141 to 150 of about 643 (178)
The first record of a shortnose chimaera-like egg capsule from the Mesozoic (Late Jurassic, Switzerland). [PDF]
Swiss J PalaeontolZhao Y +5 more
europepmc +1 more source
The relationship of placoderms [PDF]
Journal of Vertebrate Paleontology, 1984 ABSTRACT A review of the evidence suggests that placoderms are more closely related to osteichthyans than chondrichthyans. A new phylogeny of placoderms is proposed in which the ptyctodonts are considered the collateral descendants of all other placoderms.
Long, J. +11 more
exaly +8 more sources
Exceptional preservation of organs in Devonian placoderms from the Gogo lagerstätte
Science, 2022 The origin and early diversification of jawed vertebrates involved major changes to skeletal and soft anatomy. Skeletal transformations can be examined directly by studying fossil stem gnathostomes; however, preservation of soft anatomy is rare. We describe the only known example of a three-dimensionally mineralized heart, thick-walled stomach, and ...
Kate Trinajstić +2 more
exaly +4 more sources
Placoderms and the evolutionary origin of teeth: a comment on Rücklin & Donoghue (2015) [PDF]
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.
Carole J Burrow, Yuzhi Hu, Gavin Young
exaly +6 more sources
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Paleontology: There are more placoderms in the sea
Current Biology, 2021Fossil fish from the Silurian of China continue to surprise. These so-called 'maxillate placoderms', including the newly described Bianchengichthys micros, show a range of anatomical features that question our picture of vertebrate evolution and diversification.
Zerina Johanson
exaly +3 more sources
Biological Reviews, 2005 The fossil group Placodermi is the most phylogenetically basal of the clade of jawed vertebrates but lacks a marginal dentition comparable to that of the dentate Chondrichthyes, Acanthodii and Osteichthyes (crown-group Gnathostomata).
Zerina Johanson +2 more
exaly +2 more sources
Comptes Rendus - Palevol, 2011 International audienceThe presence of an aerial breathing organ in Placoderms is noticed in many textbooks on the history of breathing in Vertebrates. The origin of this interpretation is from a paper published in 1941 dealing with the interpretation of ...
Daniel Goujet
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Current Biology
For over 70 million years, during the Paleozoic, the placoderms (Greek for 'plated skin'), an extinct group of armoured fishes, were the most abundant and diverse vertebrates on our planet. Some of the first placoderm fossils discovered - such as Bothriolepis with its bone-covered pectoral fins - seemed so bizarre that they were thought to represent ...
John A Long, Kate Trinajstić
exaly +3 more sources
For over 70 million years, during the Paleozoic, the placoderms (Greek for 'plated skin'), an extinct group of armoured fishes, were the most abundant and diverse vertebrates on our planet. Some of the first placoderm fossils discovered - such as Bothriolepis with its bone-covered pectoral fins - seemed so bizarre that they were thought to represent ...
John A Long, Kate Trinajstić
exaly +3 more sources
A review of placoderm scales, and their significance in placoderm phylogeny
Journal of Vertebrate Paleontology, 1999An historical review of the literature relating to placoderm scales preserved in association with articulated dermal plates, or as isolated units in microvertebrate assemblages, is followed by a discussion of their relevance in phylogenetic analyses of the Placodermi.
Burrow, C. J., Turner, S.
openaire +4 more sources