Results 141 to 150 of about 1,468 (177)

Keratinization of the epidermis of the Australian lungfish Neoceratodus forsteri (dipnoi)

Journal of Morphology, 2003
AbstractThe differentiation of the epidermis in sarcopterigian fish may reveal some trend of keratinization followed by amphibian ancestors to adapt their epidermis to land. Therefore, the process of keratinization of the epidermis of the Australian lungfish Neoceratodus forsteri was studied by histochemistry, electron microscopy, and keratin ...
Lorenzo, Alibardi, Jean M P, Joss
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Osteogenesis in the Australian lungfish, Neoceratodus forsteri (Osteichthyes: Dipnoi)

Australian Journal of Zoology, 2022
Several types of bone development are present in the Australian lungfish, Neoceratodus forsteri, the only extant member of the family Neoceratodontidae. In this species, dermal and parachondral bones form around the chondrocranium and mandible, to protect the brain and sense organs, to support the dentition and to facilitate oral function.
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Anomalies in skull bones of the Australian lungfish,Neoceratodus forsteri, compared with aberrations in fossil dipnoan skulls

Journal of Vertebrate Paleontology, 1999
Abnormalities that appear during the development of the dermal, chondral and visceral cranium of the Australian lungfish, Neoceratodus forsteri, are common and many of these anomalies are reflected in the skulls of fossil lungfish.
Kemp, A. R., A. Kemp
exaly   +2 more sources

True enamel covering in teeth of the Australian lungfish Neoceratodus forsteri

Cell and Tissue Research, 1999
Lungfish are a unique order of sarcopterygian fish cleidographically positioned between tetrapods and fish. An uninterrupted 400-million-year-old fossil record has documented lungfish skeletal elements to remain virtually unchanged since the Early Devonian.
P G, Satchell, C F, Shuler, T G, Diekwisch   +2 more
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Histochemical studies of the adrenocortical homologue in the kidney of the Australian lungfish, Neoceratodus forsteri

Cell and Tissue Research, 1975
A histochemical study has been made of groups of cells lying adjacent to the blood vessels of the kidney of Neoceratodus forsteri. The cells contain lipid droplets of varying sizes, stain positively for cholesterol and its esters and contain 3betaol-steroid dehydrogenase activity.
P A Janssens
exaly   +3 more sources

Neoceratodus forsteri (Australian lungfish)

Trends in Genetics, 2021
Manfred, Schartl, Axel, Meyer
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Early development of neural tissues and mesenchyme in the Australian lungfish Neoceratodus forsteri (Osteichthyes: Dipnoi)

Journal of Zoology, 2000
Analysis of early development of the head of the Australian lungfish Neoceratodus forsteri indicates that no mesenchyme cells in this species enter the embryo as neurectoderm cells, originally positioned between presumptive ectoderm and primordial neural
Kemp, A. R.
exaly   +2 more sources

Purification and Characterization of Insulin from the Australian Lungfish, Neoceratodus forsteri (Dipnoi)

General and Comparative Endocrinology, 1999
The Australian lungfish Neoceratodus forsteri, a facultative air breather, is considered to be the most primitive of the extant Dipnoi and so occupies a uniquely important evolutionary position in the transition from fish to tetrapods. Insulin was isolated from an extract of the pancreas of N. forsteri and its primary structure established as: A-Chain,
J M, Conlon, Y, Basir, J M, Joss
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Fine structure of the spermatozoon of the Australian lungfish Neoceratodus forsteri (Krefft)

Journal of Ultrastructure Research, 1971
An examination of the mature spermatozoon of the Australian lungfish showed it to be distinctly divided into three parts: (a) A head, the foremost tapering end of which forms an acrosome; a very elongated nucleus lies behind the acrosome; two rod-shaped structures extend from the point of the acrosome backward longitudinally through about 4/5 of the ...
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EARLY PRONEPHRIC GROWTH IN NEOCERATODUS LARVAE

Proceedings of the Zoological Society of London, 1960
The pronephric systems of eight Neoceratodus larvae ranging from 11·5 to 16 mm. total length were analysed quantitatively and the measurements were treated statistically for two groups of mean total length 11·5 mm. and 15·3 mm. In the 15·3 mm. group the means of the measurements of the nuclear population, total volume of cells, overall pronephros ...
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