Early Gnathostome Phylogeny Revisited: Multiple Method Consensus. [PDF]
PLoS ONE, 2016 A series of recent studies recovered consistent phylogenetic scenarios of jawed vertebrates, such as the paraphyly of placoderms with respect to crown gnathostomes, and antiarchs as the sister group of all other jawed vertebrates.
Tuo Qiao +4 more
doaj +8 more sources
Squamation and scale morphology at the root of jawed vertebrates [PDF]
eLife, 2022 Placoderms, as the earliest branching jawed vertebrates, are crucial to understanding how the characters of crown gnathostomes comprising Chondrichthyes and Osteichthyes evolved from their stem relatives.
Yajing Wang, Min Zhu
doaj +2 more sources
A well-preserved 'placoderm' (stem-group Gnathostomata) upper jaw from the Early Devonian of Mongolia clarifies jaw evolution. [PDF]
R Soc Open Sci, 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.
Brazeau MD +7 more
europepmc +3 more sources
How big can a walking fish be? A theoretical inference based on observations on four land-dwelling fish genera of South Vietnam. [PDF]
Integr Zool, 2022 Modern amphibiotic fishes use various walking techniques but are smaller in length than half a meter, whereas extinct tetrapodomorph fishes of Devonian ranged from 0.5 to 2.5 m. Could they walk out of water, and how did they walk if they could? This study argues that, in recent ichthyofauna, snakehead is most appropriate for modeling walking technique ...
Kuznetsov AN.
europepmc +2 more sources
Redescription of Phymolepis cuifengshanensis (Antiarcha: Yunnanolepididae) using high-resolution computed tomography and new insights into anatomical details of the endocranium in antiarchs [PDF]
PeerJ, 2018 Background Yunnanolepidoids constitute either the most basal consecutive segments or the most primitive clade of antiarchs, a highly diversified jawed vertebrate group from the Silurian and Early Devonian periods.
Yajing Wang, Min Zhu
doaj +3 more sources
Reappraisal of the Silurian placoderm Silurolepis and insights into the dermal neck joint evolution [PDF]
Royal Society Open Science, 2019 Silurolepis platydorsalis, a Silurian jawed vertebrate originally identified as an antiarch, is here redescribed as a maxillate placoderm close to Qilinyu and is anteroposteriorly reversed as opposed to the original description.
You-an Zhu, Jing Lu, Min Zhu
doaj +2 more sources
Taphonomy of the vertebrate bone beds from the Klūnas fossil site, Upper Devonian Tērvete Formation of Latvia [PDF]
Estonian Journal of Earth Sciences, 2012 Combined sedimentological and taphonomical study of the siliciclastic sequence of the Tērvete Formation in the stratotypical area was aimed at revealing the formation of the three oryctocoenoses discovered and related structural and textural features of ...
Jeļena Vasiļkova +3 more
doaj +3 more sources
Synovial joints were present in the common ancestor of jawed fish but lacking in jawless fish. [PDF]
PLoS BiolSynovial joints, characterized by reciprocally congruent and lubricated articular surfaces separated by a cavity, can simultaneously provide mobility and load bearing.
Sharma N, Haridy Y, Shubin N.
europepmc +3 more sources
New morphological information on, and species of placoderm fish Africanaspis (Arthrodira, Placodermi) from the Late Devonian of South Africa. [PDF]
PLoS One, 2017 Here we present a new species of placoderm fish, Africanaspis edmountaini sp. nov., and redescribe Africanaspis doryssa on the basis of new material collected from the type locality of Africanaspis.
Gess RW, Trinajstic KM.
europepmc +5 more sources
SYSTEMATIC POSITION OF ANTIARCHS (VERTEBRATA, PLACODERMI) FROM THE FAMENNIAN OF TVER REGION, RUSSIA
Izvestiya Vysshikh Uchebnykh Zavedenii Geologiya I Razvedka, 2017 New materials of the placoderm fish Bothriolepis heckeri Luksеvics from the Famennian of the Bilovo locality (Tver Region) are studied. This species is very similar to Livnolepis zadonica (H.Obrucheva) in the structure of cranial and postcranial armours ...
S. V. Moloshnikov, V. V. Linkevich
exaly +3 more sources