Results 91 to 100 of about 717 (179)

Precaudal Vertebrae in the Postcranial Region of Moray Eels Form Ventral Processes

Journal of Morphology, Volume 285, Issue 10, October 2024.
The precaudal vertebrae in the postcranial region of moray eels form ventral processes with blood vessels. ABSTRACT Fish vertebrae are primarily morphologically classified into precaudal vertebrae jointed to the ribs and caudal vertebrae with hemal spines, through which the caudal artery and veins pass.
Yuu Usui, Naoki Yamane, Akira Hanashima, Ken Hashimoto, Yuji Kanaoka, Satoshi Mohri   +5 more
wiley   +1 more source

Fish Assemblage from the Givetian (Middle Devonian) of the Kuznetsk Basin, Russia

Учёные записки Казанского университета: Серия Естественные науки
A diverse fish assemblage was reported from the Mazalovskiy Kitat and Alchedat beds (Givetian, Middle Devonian) of the Kuznetsk Basin (Siberia, Russia).
A. O. Ivanov, N. G. Izokh
doaj   +1 more source

Loss in the making: absence of pelvic fins and presence of paedomorphic pelvic girdles in a Late Devonian antiarch placoderm (jawed stem-gnathostome). [PDF]

Biol Lett, 2018
Within jawed vertebrates, pelvic appendages have been modified or lost repeatedly, including in the most phylogenetically basal, extinct, antiarch placoderms.
Charest F, Johanson Z, Cloutier R.
europepmc   +2 more sources

Separate evolutionary origins of teeth from evidence in fossil jawed vertebrates.

, 2003
Placoderms are extinct jawed fishes of the class Placodermi and are basal among jawed vertebrates. It is generally thought that teeth are absent in placoderms and that the phylogenetic origin of teeth occurred after the evolution of jaws. However, we now
Smith, M M, Johanson, Z
core   +1 more source

Darwin, Haeckel, and the “Mikluskan gas organ theory”

Developmental Dynamics, Volume 253, Issue 4, Page 370-389, April 2024.
Abstract A previously unknown reference to the Russian ethnologist, biologist, and traveler Nikolai N. Miklucho‐Maclay (1846–1888) was discovered in correspondence between Charles Darwin (1809–1882) and Ernst Haeckel (1834–1919). This reference has remained unknown to science, even to Miklucho‐Maclay's biographers, probably because Darwin used the ...
Ingmar Werneburg, Uwe Hoßfeld, Georgy S. Levit   +2 more
wiley   +1 more source

Palaeogeographical and palaeoecological constraints on palaeozoic vertebrates (chondrichthyans and placoderms) in the Ardenne Massif - Shark radiations in the Famennian on both sides of the Paleotethys

, 2014
peer reviewedThree chondrichthyan radiations are registered in the Famennian of the ArdenneMassif (Belgium). These radiations are already observed in Morocco and in the Carnic Alps, their acme being related with the early expansa transgression ...
Groessens, Eric, Olive, Sébastien, Derycke, Claire, Goujet, Daniel   +3 more
core   +1 more source

The effects of lecture speed and note‐taking on memory for educational material

Applied Cognitive Psychology, Volume 38, Issue 1, January/February 2024.
Abstract The use of pre‐recorded lecture videos as a primary mode of instruction during online learning has allowed students flexibility in how they self‐regulate their learning. Although increasing lectures up to 2x speed has little cost on memory, it is unknown whether note‐taking at increased speeds interacts with memory.
Ashley Chen, Dillon H. Murphy, Jordan A. Brabec, Robert A. Bjork, Elizabeth L. Bjork   +4 more
wiley   +1 more source

Bone vascularization and growth in placoderms (Vertebrata): The example of the premedian plate of Romundina stellina Ørvig, 1975

, 2010
International audienceThe Placodermi (armored jawed fishes), which appeared during the Lower Silurian and disappeared without leading any descendants at the end of the Famennian (Latest Devonian), have the highest diversity of known Devonian vertebrate ...
Paul Tafforeau, Goujet, Daniel,, Tafforeau, Paul,, Dupret, Vincent,, Ahlberg, Per Erik,, Dupret, V., Sophie Sanchez, Daniel Goujet, Sanchez, Sophie,, Goujet, D., Per E. Ahlberg, Ahlberg, P.E., Sanchez, Sébastien, Tafforeau, P., Vincent Dupret   +14 more
core   +1 more source

Taxonomic revision of buchanosteoid placoderms (Arthrodira) from the early devonian of south-eastern australia and arctic Russia

, 2015
The 'buchanosteid' placoderms are best known from the Early Devonian of Australia, but also occur in China, Russia, Central Asia and the Middle East.
Mark-Kurik, Elga, Long, John, Young, Gavin   +2 more
core   +1 more source

Fossilized ontogenies: The contribution of placoderm ontogeny to our understanding of the evolution of early gnathostomes

, 2014
Placoderms, representing phylogenetically more inclusive jawed vertebrates and successive sister taxa to crown-group gnathostomes, are critical to our understanding of character evolution within the crown-group (chondrichthyans + osteichthyans ...
Johanson, Z., Trinajstic, Katherine
core   +2 more sources