Results 31 to 40 of about 643 (178)

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

A Middle-Late Devonian fish fauna from the Sierra de Perijá, western Venezuela, South America [PDF]

Fossil Record, 2002
A new Devonian fossil fish fauna from the region of Caño Colorado between the Rio Palmar and Rio Socuy, Sierra de Perijá, Venezuela, comes from two localities and several horizons within the Campo Chico Formation, dated on plants and spores as Givetian ...
G. C. Young, J. M. Moody
doaj   +5 more sources

Stages of development of the Middle-Late Devonian ICHTHYOFAUNA (Placodermi: Antiarchi) from the northern Eurasia

Известия высших учебных заведений: Геология и разведка, 2019
Three stages, namely Middle Devonian (I), Early Late Devonian (II) and Late Late Devonian (III), are distin-guished in the evolution of antiarchs (Placodermi, Antiarchi) in the Middle-Late Devonian of Northern Eurasia.
S. V. Moloshnikov
doaj   +1 more source

Electroporation‐based delivery of proteins in Penium margaritaceum and other zygnematophycean algae

Physiologia Plantarum, Volume 175, Issue 6, November/December 2023., 2023
Abstract Zygnematophycean algae represent the streptophyte group identified as the closest sister clade to land plants. Their phylogenetic position and growing genomic resources make these freshwater algae attractive models for evolutionary studies in the context of plant terrestrialization.
Vanessa Polet Carrillo‐Carrasco, Jorge Hernández‐García, Dolf Weijers   +2 more
wiley   +1 more source

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, Benedict King, John A Long, Per E Ahlberg, Min Zhu   +4 more
doaj   +1 more source

Bioclastic bottom‐current deposits of a Devonian contourite terrace: Facies variability and depositional architecture (Tafilalt Platform, Morocco)

Sedimentology, Volume 70, Issue 5, Page 1413-1471, August 2023., 2023
ABSTRACT The study examines bioclastic carbonate contourites that arise from the broad spectrum of bottom‐current related sedimentary processes ranging from deposition to erosion. The result of the intermittent accumulation of sediment are thin and condensed successions with abundant hiatuses.
Heiko Hüneke, M. Arwed Gibb, Oliver Mayer, Jorit F. Kniest, Paul Mehlhorn, Laura M. Gibb, Z. Sarah Aboussalam, R. Thomas Becker, Ahmed El Hassani, Lahssen Baidder   +9 more
wiley   +1 more source

Response to comment on “Exceptional preservation of organs in Devonian placoderms from the Gogo largerstätte”

, 2023
Jensen et al. (1) question evidence presented of a chambered heart within placoderms, citing its small size and apparently ventral atrium. However, they fail to note the belly-up orientation of the placoderm within one nodule, and the variability of ...
Paul Tafforeau, Lee, Michael S. Y.,, Peter D. Currie, Tafforeau, Paul,, Bevitt, Joseph J.,, Dupret, Vincent,, Clement, Alice M.,, Currie, Peter D.,, Kate Trinajstic, Sophie Sanchez, Sanchez, Sophie,, Roelofs, Brett,, Catherine A. Boisvert, Per E. Ahlberg, Boisvert, Catherine A.,, Vincent Dupret, Long, John,, Daniel Snitting, Snitting, Daniel,, Ahlberg, Per E.,, Alice M. Clement, Brett Roelofs, Joseph J. Bevitt, Michael S.Y. Lee, Trinajstic, Kate,, John Long   +25 more
core   +1 more source

Some notes on a variability of Bothriolepidids (Placodermi, Antiarchi): unusual specimen of Livnolepis Heckeri (Luksevics) from the famennian of Tver region, European Russia

Известия высших учебных заведений: Геология и разведка, 2019
The fragment of the skull cap of placoderm Livnolepis heckeri (Luksevics) from the Bilovo Formation (Famennian, Upper Devonian) near the Bilovo Village of Tver Region has been described.
S. V. Moloshnikov, V. V. Linkevich
doaj   +1 more source

Neurocranial anatomy of three unusual placoderms revealed by computed tomography scanning, and their implications for early gnathostomes evolution [PDF]

, 2018
Placoderms are the only known stem-group jawed vertebrates with jaws and their phylogenetic relationships have become central to the question of how gnathostomes evolved.
Castiello, Marco
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