The Dermal Skeleton of Stem-Actinopterygian Moythomasia durgaringa and Its Implications for the Nature of the Ancestral Osteichthyan. [PDF]
J MorpholThe figure presents a model of Moythomasia and a schematic histological model illustrating the internal structure and features of the cranial bones. These include bone (brown), osteocyte spaces (red), spheritic bone (light brown), osteon spaces (orange), dentine and canaliculi (green), pulp canal (yellow), ganoine (gray), arrested growth lines (dashed ...
Shan X +5 more
europepmc +2 more sources
Life history and ossification patterns in Miguashaia bureaui reveal the early evolution of osteogenesis in coelacanths [PDF]
PeerJ, 2022 The study of development is critical for revealing the evolution of major vertebrate lineages. Coelacanths have one of the longest evolutionary histories among osteichthyans, but despite access to extant representatives, the onset of their weakly ...
Jorge Mondéjar Fernández +4 more
doaj +2 more sources
A fresh look at Cladarosymblema narrienense, a tetrapodomorph fish (Sarcopterygii: Megalichthyidae) from the Carboniferous of Australia, illuminated via X-ray tomography [PDF]
PeerJ, 2021 Background The megalichthyids are one of several clades of extinct tetrapodomorph fish that lived throughout the Devonian–Permian periods. They are advanced “osteolepidid-grade” fishes that lived in freshwater swamp and lake environments, with some taxa ...
Alice M. Clement +5 more
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Acta Palaeontologica Polonica, 2023 Sarcopterygian remains are relatively common in the so-called “Placoderm Sandstone” (storm-origin bone-bearing breccia) from the Emsian (Lower Devonian) of Podłazie in the Holy Cross Mountains (Poland).
OLGA WILK
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Lung evolution in vertebrates and the water-to-land transition
eLife, 2022 A crucial evolutionary change in vertebrate history was the Palaeozoic (Devonian 419–359 million years ago) water-to-land transition, allowed by key morphological and physiological modifications including the acquisition of lungs. Nonetheless, the origin
Camila Cupello +12 more
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The comparative osteology and phylogenetic relationships of African and South American lungfishes (Sarcopterygii: Dipnoi) [PDF]
Zoological Journal of the Linnean Society, 2015 Criswell, Katharine E. (2015): The comparative osteology and phylogenetic relationships of African and South American lungfishes (Sarcopterygii: Dipnoi).
Criswell, Katharine E. +1 more
openaire +2 more sources
150 million years of freshwater fish biogeography: vicariance or dispersal? [PDF]
Research & Knowledge, 2017 Freshwater fishes are supposedly good case studies to test palaeobiogeographical models because they are attached to land masses, at least primary freshwater fishes, which are unable to cross marine barriers.
Lionel Cavin
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Coelacanths from the Middle Triassic of Switzerland and the pace of actinistian evolution [PDF]
Research & Knowledge, 2017 Latimeria chalumnae (Actinistia) was regarded as the ‘ancestor of the four-legged vertebrates’ and rapidly became the iconic example of a ‘living fossil’.
Christophe Ferrante +3 more
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Mandibular musculature constrains brain–endocast disparity between sarcopterygians
Royal Society Open Science, 2020 The transition from water to land by the earliest tetrapods in the Devonian Period is seen as one of the greatest steps in evolution. However, little is understood concerning changes in brain morphology over this transition.
T. J. Challands +2 more
doaj +1 more source
The timing of Timezyme diversification in vertebrates. [PDF]
PLoS ONE, 2014 All biological functions in vertebrates are synchronized with daily and seasonal changes in the environment by the time keeping hormone melatonin. Its nocturnal surge is primarily due to the rhythmic activity of the arylalkylamine N-acetyl transferase ...
Damien Cazaméa-Catalan +3 more
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