Results 71 to 80 of about 617 (180)

Lungfish‐like antero‐labial tooth addition and amphibian‐like enameloid‐enamel transition in the coronoid of a Devonian stem actinopterygian

open access: yesJournal of Anatomy, Volume 247, Issue 3-4, Page 418-441, September/October 2025.
The tooth patterning logic, which cannot be inferred from surface morphology, is revealed by visualizing buried tooth remnants in 3D. The primary teeth are added labially, initially organized in radial rows, which transition into linear rows where the coronoid becomes slender.
Donglei Chen
wiley   +1 more source

Placoderm interrelationships: a new interpretation, with a short review of placoderm classifications

open access: yes, 1984
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +1 more source

Three-dimensional paleohistology of the scale and median fin spine of Lophosteus superbus (Pander 1856) [PDF]

open access: yesPeerJ, 2016
Lophosteus superbus is one of only a handful of probable stem-group osteichthyans known from the fossil record. First collected and described in the late 19th century from the upper Silurian Saaremaa Cliff locality in Estonia, it is known from a wealth ...
Anna Jerve   +4 more
doaj   +2 more sources

On the Maxillofacial Development of Mice, Mus musculus

open access: yesJournal of Morphology, Volume 286, Issue 3, March 2025.
This study focused on the craniofacial development of the mouse (Mus musculus), particularly the maxillofacial region. Using three‐dimensional reconstructions of histological sections combined with whole‐mount staining, we provided a detailed description of skeletal, neural, and vascular formation from the pharyngula (9.0 dpc) to late fetal stages (18 ...
Hiroki Higashiyama   +4 more
wiley   +1 more source

3D and Mimics files of Silurian placoderm Bianchengichthys

open access: yes
3D and Mimics files of Silurian placoderm ...
Jing Lu (4480942)   +2 more
core   +1 more source

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

open access: yesJournal 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   +5 more
wiley   +1 more source

Data from: Bayesian morphological clock methods resurrect placoderm monophyly and reveal rapid early evolution in jawed vertebrates

open access: yes, 2016
The phylogeny of early gnathostomes provides an important framework for understanding one of the most significant evolutionary events, the origin and diversification of jawed vertebrates.
Qiao, Tuo   +4 more
core   +1 more source

The internal cranial anatomy of Romundina stellina Ørvig, 1975 (Vertebrata, Placodermi, Acanthothoraci) and the origin of jawed vertebrates-Anatomical atlas of a primitive gnathostome.

open access: yesPLoS ONE, 2017
Placoderms are considered as the first jawed vertebrates and constitute a paraphyletic group in the stem-gnathostome grade. The acanthothoracid placoderms are among the phylogenetically most basal and morphologically primitive gnathostomes, but their ...
Vincent Dupret   +3 more
doaj   +1 more source

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

open access: yesDevelopmental 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   +2 more
wiley   +1 more source

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

open access: yes, 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   +1 more source

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