Results 41 to 50 of about 617 (180)

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, Ervīns Lukševičs, Ģirts Stinkulis, Ivars Zupiņš   +3 more
doaj   +1 more source

A Devonian Fish Tale: A New Method of Body Length Estimation Suggests Much Smaller Sizes for Dunkleosteus terrelli (Placodermi: Arthrodira)

Diversity, 2023
Dunkleosteus terrelli, an arthrodire placoderm, is one of the most widely recognized fossil vertebrates due to its large size and status as one of the earliest vertebrate apex predators.
Russell K. Engelman
doaj   +1 more source

Revision of the Late Devonian ptyctodonts (Vertebrata, Placodermi) from southern Poland [PDF]

Estonian Journal of Earth Sciences
New studies on Frasnian ptyctodonts, including the revision of historic material in addition to the description of new material, have resulted in the detailed description of two species of Ptyctodus (Ptyctodus obliquus, Ptyctodus kielcensis), eight ...
Katarzyna Grygorczyk, Olga Wilk, Piotr Szrek   +2 more
doaj   +1 more source

SYSTEMATIC POSITION OF ANTIARCHS (VERTEBRATA, PLACODERMI) FROM THE FAMENNIAN OF TVER REGION, RUSSIA

Известия высших учебных заведений: Геология и разведка, 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
doaj   +1 more source

A new placoderm fish (Acanthothoraci) from the Early Devonian Jauf Formation (Saudi Arabia) [PDF]

, 2011
peer reviewedAn exceptionally well-preserved new acanthothoracid (placoderm fish) presenting complete endocranium and skull roof, from Saudi Arabia (Qasr Limestone Member, Jauf Formation), Early Devonian in age, is described as Arabosteus variabilis n ...
Olive, Sébastien, Hervé Lelièvre, Lelièvre, Hervé, Dominique Janjou, Goujet, Daniel, Janjou, Dominique, Sébastien Olive, Daniel Goujet   +7 more
core   +1 more source

The stratigraphie distribution of antiarch remains (Pisces, Placodermi) in Devonian of southern regions of Russia

Известия высших учебных заведений: Геология и разведка, 2015
The stratigraphic distribution of antiarch remains in the Middle-Upper Devonian of central, southern and east-south regions of East European Platform (EEP), western slope of South Urals and Siberia are analyzed.
S. V. Moloshnikov
doaj   +1 more source

Type Crania of the Devonian Placoderm Macropetalichthys from North America: Resolving Key Nomenclatural and Stratigraphic Conundrums

Fishes
Macropetalichthys rapheidolabis Norwood and Owen, 1846 (Placodermi: Petalichthyida), type species of Macropetalichthys Norwood and Owen, 1846, was based on a single cranial roof from the Devonian of southeastern Indiana.
Loren E. Babcock
doaj   +1 more source

3D microstructural architecture of muscle attachments in extant and fossil vertebrates revealed by synchrotron microtomography. [PDF]

PLoS ONE, 2013
BACKGROUND: Firm attachments binding muscles to skeleton are crucial mechanical components of the vertebrate body. These attachments (entheses) are complex three-dimensional structures, containing distinctive arrangements of cells and fibre systems ...
Sophie Sanchez, Vincent Dupret, Paul Tafforeau, Katherine M Trinajstic, Bettina Ryll, Pierre-Jean Gouttenoire, Lovisa Wretman, Louise Zylberberg, Françoise Peyrin, Per E Ahlberg   +9 more
doaj   +1 more source

A diverse group of underappreciated zygnematophytes deserves in-depth exploration

Applied Phycology, 2022
The conjugating green algae (Zygnematophyceae) are the closest relatives of land plants and hence are of great evolutionary interest. Besides the popular placoderm desmids and the filamentous species, there is an underappreciated diversity of unicellular
Anna Busch, Sebastian Hess
doaj   +1 more source

Endocast and bony labyrinth of a Devonian ‘placoderm’ challenges stem gnathostome phylogeny [PDF]

, 2021
Our understanding of the earliest evolution of jawed vertebrates depends on a credible phylogenetic framework for the jawed stem gnathostomes collectively known as ‘placoderms’.
Ahlberg, Per, Zhu, Min, Bazzi, Mohamad, Zhu, You-an, Young, Gavin C.,, Giles, Sam; id_orcid, Zhu, You-an,, Bazzi, Mohamad,, Zhu, Min,, Hu, Yuzhi, Ahlberg, Per,, Young, Gavin, Giles, Sam,, Lu, Jing, Hu, Yuzhi,, Lu, Jing,   +15 more
core   +1 more source