Results 21 to 30 of about 338 (111)

Early Gnathostome Phylogeny Revisited: Multiple Method Consensus [PDF]

open access: yes, 2016
This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.A series of recent ...
A Pradel   +149 more
core   +5 more sources

The extinct marine megafauna of the Phanerozoic. [PDF]

open access: yesCamb Prism Extinct
The modern marine megafauna is known to play important ecological roles and includes many charismatic species that have drawn the attention of both the scientific community and the public.
Pimiento C   +35 more
europepmc   +3 more sources

A well-preserved ‘placoderm’ (stem-group Gnathostomata) upper jaw from the Early Devonian of Mongolia clarifies jaw evolution [PDF]

open access: yes, 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.
Ariunchimeg, Ya   +7 more
core   +1 more source

Tityosteus, a marine fish (Arthrodira, Homostiidae) from the Emsian of Aragón, Spain, and its distribution

open access: yesSpanish Journal of Palaeontology, 2021
A right marginal plate (over 11 cm long) of Tityosteus cf. rieversae Gross, 1960, emend., has been found in the late part of the Early Emsian (late Zlichovian) in the Mariposas Fm. of the Eastern Iberian Cordillera in southern Aragón. The palaeoecological conditions correspond to a hemipelagic ensialic basin, with predominant elements of Hercynic ...
Elga Mark-Kurik, Peter Carls
openaire   +2 more sources

New information on Titanichthys (Placodermi, Arthrodira) from the Cleveland Shale (Upper Devonian) of Ohio, USA [PDF]

open access: yesJournal of Paleontology, 2017
AbstractThe placoderm Titanichthys from the Late Devonian (Famennian) is based on incomplete and fragmentary specimens that have hindered understanding of its overall anatomy and phylogenetic relationships. A new, nearly complete, articulated specimen from the Upper Devonian Cleveland Shale provides new information about the previously undescribed ...
James Boyle, Michael J. Ryan
openaire   +1 more source

Ornamentation of dermal bones of Placodermi from the Lower Devonian of Morocco as a measure of biodiversity [PDF]

open access: yes, 2017
Dermal bones are formed early during growth and thus constitute an important tool in studies of ontogenetic and evolutionary changes amongst early vertebrates.
Antczak, Mateusz, Berkowski, Błażej
core   +1 more source

A new species ofGroenlandaspisHeintz, 1932 (Placodermi, Arthrodira), from the Famennian (Late Devonian) of Belgium

open access: yesJournal of Vertebrate Paleontology, 2015
ABSTRACT A new species of the phlyctaeniid arthrodire genus Groenlandaspis from the upper Famennian of Belgium is described. The remains of Groenlandaspis potyi, sp. nov., consist of dissociated thoracic armor elements, but the specimen designated to be the holotype displays the median dorsal, anterior, and posterior dorsolateral plates in articulation.
Olive, Sébastien   +2 more
openaire   +1 more source

Der rest eines actinolepididen placodermen (Pisces) aus der bohrung bolland (emsium, Belgien) [PDF]

open access: yes, 1976
A small arctolepidid arthrodire of the subfamily Actinolepidinae is described f r om the Lower Emsium of the drilling Bolland near Liege/Belgium. The new genus resembles most A ctinolepis but differs from that genus and other Actinolepidinae in the shape
Schmidt, W.
core  

Redescription of Szelepis Liu, 1981 (Placodermi, Arthrodira), from the Lower Devonian of China

open access: yesJournal of Vertebrate Paleontology, 2017
ABSTRACTThe skull roof of the species Szelepis yunnanensis (Liu, 1979) from the Early Devonian of Yunnan is redescribed, as well as other Szelepis material previously published. It appears that only the holotype of S. yunnanensis can be confidently assigned to this genus.
Vincent Dupret, Min Zhu, Jun-Qing Wang
openaire   +2 more sources

Première découverte d'un Arthrodire (Placodermi, Vertebrata) dans le Dévonien d'Amérique du Sud [PDF]

open access: yes, 1996
Des plaques dermiques d'un grand Arthrodire eubrachyhtoracide (Placodermi, Vertebrata), provisoirement attribuées à un Dunkleosteidae, ont été découvertes dans les faciès détritique de la Formation de Colpacucho (Famennien), sur la Péninsule de Cumana ...
Diaz Martinez, Enrique   +3 more
core  

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