Results 141 to 150 of about 617 (180)

A Mechanical Approach for Comparing Jaws in Fishes. [PDF]

Biomimetics (Basel)
Trotta F, Sandulli R, Cinquemani S.
europepmc   +1 more source

A Silurian maxillate placoderm illuminates jaw evolution

Science, 2016
Jaws from the jawless Until a fossil called Entelognathus was found to contain a tripartite jaw a few years ago, it was believed that the skeletons of early osteichthyans (bony fish), the ancestors of all vertebrates, were derived independently of those of the earlier placoderms (so-called jawless fish). Zhu et al.
Min Zhu, Per E Ahlberg, Zhaohui Pan
exaly   +4 more sources

Devonian placoderm scales from Australia

Journal of Vertebrate Paleontology, 1998
The 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.
exaly   +5 more sources

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A review of placoderm scales, and their significance in placoderm phylogeny

Journal of Vertebrate Paleontology, 1999
An 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.
Carole J Burrow, Susan Turner
exaly   +5 more sources

New placoderm fishes from the Late Devonian of South Africa

Journal of Vertebrate Paleontology, 1997
New placoderm fishes are described from a black shale lens in the Famennian Witpoort Formation, near Grahamstown, South Africa. Arthrodires include a new species of Groenlandaspis, G. riniensis sp.
John A Long
exaly   +2 more sources

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 ...
Gavin C Young
exaly   +2 more sources

The relationships of placoderm fishes

Zoological Journal of the Linnean Society, 1986
Gavin C Young
exaly   +2 more sources

Paleontology: There are more placoderms in the sea

Current Biology, 2021
Fossil 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.
openaire   +2 more sources

Did placoderm fish have teeth?

Journal of Vertebrate Paleontology, 2003
Gavin C Young
exaly   +2 more sources

Pelvic and reproductive structures in placoderms (stem gnathostomes)

Biological Reviews, 2014
ABSTRACTNewly 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 reproductive complexity.
Trinajstic, Katherine, Boisvert, C., Long, J., Maksimenko, A., Johanson, Z.   +4 more
openaire   +5 more sources