Results 141 to 150 of about 717 (179)
The relationship of placoderms
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.
Brian G. Gardiner
exaly +3 more sources
Some of the next articles are maybe not open access.
Related searches:
Related searches:
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
Pelvic and reproductive structures in placoderms (stem gnathostomes)
Biological Reviews, 2015 Newly discovered pelvic and reproductive structures within placoderms, representing some of the most crownward members of the gnathostome stem group and the most basal jawed vertebrates, challenge established ideas on the origin of the pelvic girdle and ...
John A. Long +2 more
exaly +1 more source
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, Moya M Smith
exaly +2 more sources
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 Trinajstic
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 Trinajstic
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
Devonian Placoderm Scales from Australia
Journal of Vertebrate Paleontology, 1998The morphology and histology of Australian placoderm scales which were found associated with dermal plates are described and compared. The specimens include the arthrodire Buchanosteus confertituberculatus from the Early Devonian (Emsian) of Buchan, Victoria, the arthrodires Goodradigbeeon australianium and Buchanosteidae gen. et sp.
Burrow C.J., Turner S.
openaire +3 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 ...
Goujet, D., Daniel Goujet
exaly +2 more sources