Results 11 to 20 of about 963 (148)
Distributional patterns of ?Mawsoniidae (Sarcopterygii: Actinistia) [PDF]
Anais da Academia Brasileira de Ciências, 2014 Mawsoniidae are a fossil family of actinistian fish popularly known as coelacanths, which are found in continental and marine paleoenvironments. The taxon is considered monophyletic, including five valid genera (Axelrodichthys, Chinlea, Diplurus ...
RAPHAEL MIGUEL +2 more
doaj +6 more sources
PLoS ONE, 2023 We describe the largest bony fish in the Late Devonian (late Famennian) fossil assemblage from Waterloo Farm near Makhanda/Grahamstown, South Africa. It is a giant member of the extinct clade Tristichopteridae (Sarcopterygii: Tetrapodomorpha) and most ...
Robert W Gess, Per E Ahlberg
doaj +6 more sources
The first virtual cranial endocast of a lungfish (sarcopterygii: dipnoi).
PLoS ONE, 2014 Lungfish, or dipnoans, have a history spanning over 400 million years and are the closest living sister taxon to the tetrapods. Most Devonian lungfish had heavily ossified endoskeletons, whereas most Mesozoic and Cenozoic lungfish had largely ...
Alice M Clement, Per E Ahlberg
doaj +4 more sources
Rhipidistians (Sarcopterygii) from the Hunter Siltstone (Late Famennian) near Grenfell, NSW, Australia [PDF]
Fossil Record, 2000 Rhipidistian sarcopterygian fishes (Dipnomorpha + Tetrapodomorpha) are well represented in the upper levels of the Hunter Siltstone (latest Famennian) near Grenfell. New South Wales (NSW), Australia.
Z. Johanson, A. Ritchie
doaj +8 more sources
Histology of juvenile skin of Lepidosiren paradoxa Fitzinger, 1837 (Sarcopterygii, Dipnoi) [PDF]
Anais da Academia Brasileira de Ciências, 2019 : The skin of three juvenile Lepidosiren paradoxa specimens was examined. The epidermis was composed of a polystratified epithelium resting on a basement membrane, including mucus-secreting cells, and a cuticle of mucopolysaccharides on the surface.
LUIS ALBERTO ROMANO +3 more
doaj +4 more sources
The cranial endocast of Dipnorhynchus sussmilchi (Sarcopterygii: Dipnoi) and the interrelationships of stem-group lungfishes [PDF]
PeerJ, 2016 The first virtual cranial endocast of a lungfish from the Early Devonian, Dipnorhynchus sussmilchi, is described. Dipnorhynchus, only the fourth Devonian lungfish for which a near complete cranial endocast is known, is a key taxon for clarifying ...
Alice M. Clement +3 more
doaj +7 more sources
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
Herpetichthyes, Amphibioidei, Choanichthyes or Sarcopterygii? [PDF]
Nature, 1955 WE are glad to see Prof. A. S. Romer's authority withdrawn from the unhappy term Choanichthyes; but we do not think it necessary or desirable to coin a new one to cover the Rhipidistia, Actinistia and Dipnoi. We would revert to calling them all Crossopterygii.
ETHELWYNN TREWAVAS +3 more
openaire +2 more sources
The hyomandibulae of rhizodontids (Sarcopterygii, stem‐tetrapoda)
Journal of Morphology, 2008 AbstractDespite its important role in the study of the evolution of tetrapods, the hyomandibular bone (the homologue of the stapes in crown‐group tetrapods) is known for only a few of the fish‐like members of the tetrapod stem‐group. The best‐known example, that of the tristichopterid Eusthenopteron, has been used as an exemplar of fish‐like stem ...
Martin D, Brazeau, Jonathan E, Jeffery
+6 more sources
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
doaj +1 more source