Results 161 to 170 of about 2,670 (209)
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Nature Reviews Genetics, 2021
Two new studies report the assembled genomes of the Australian lungfish (Neoceratodus forsteri) and the African lungfish (Protopterus annectens), which provide insights into the water-to-land transition.
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Two new studies report the assembled genomes of the Australian lungfish (Neoceratodus forsteri) and the African lungfish (Protopterus annectens), which provide insights into the water-to-land transition.
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Nature, 2003
Perhaps the most enduring of puzzles in palaeontology has been the identity of Palaeospondylus gunni Traquair, a tiny (5-60-mm) vertebrate fossil from the Middle Devonian period (approximately 385 Myr ago) of Scotland, first discovered in 1890 (refs 1-3). It is known principally from a single site (Achanarras Quarry, Caithness) where, paradoxically, it
Keith S, Thomson +2 more
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Perhaps the most enduring of puzzles in palaeontology has been the identity of Palaeospondylus gunni Traquair, a tiny (5-60-mm) vertebrate fossil from the Middle Devonian period (approximately 385 Myr ago) of Scotland, first discovered in 1890 (refs 1-3). It is known principally from a single site (Achanarras Quarry, Caithness) where, paradoxically, it
Keith S, Thomson +2 more
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Conserved developmental processes constrain evolution of lungfish dentitions
Journal of Anatomy, 2001 Although the 3 genera of living lungfish have different-shaped adult tooth plates, their larval stages have similar patterns of development. The sequence in the pattern of initiation of teeth and their modification through ontogeny in Neoceratodus ...
Moya Meredith Smith, M M Smith
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Microscopy Research and Technique, 2002
AbstractLungfish are a group of ancient fish, represented almost continuously in the fossil record from their first appearance in the Devonian to the present time. They have numerous unique characters in the dentition, found only among lungfish, as well as some that are shared with other groups of fish and with higher vertebrates, such as a thin layer ...
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AbstractLungfish are a group of ancient fish, represented almost continuously in the fossil record from their first appearance in the Devonian to the present time. They have numerous unique characters in the dentition, found only among lungfish, as well as some that are shared with other groups of fish and with higher vertebrates, such as a thin layer ...
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The remarkable lungfish otolith
New Zealand Journal of Marine and Freshwater Research, 1986Abstract Otoliths and macula from the Australian lungfish Neoceratodus forsteri were examined by light and scanning electron microscopy. The otoliths, corresponding to the sagitta and lapillus in teleosts, were found to consist of crystalline oto‐conia consisting of calcite,
R W Gauldie
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2009
Abstract The six species of lungAsh are the living representatives of the Subclass Dipnoi. thesespecies are divided into two suborders (Lepidosirenoidei and Ceratodontoidei) and three families (Lepidosirenidae, Protopteridae, Ceratodontidae) (1).
Matthew P Heinickea +2 more
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Abstract The six species of lungAsh are the living representatives of the Subclass Dipnoi. thesespecies are divided into two suborders (Lepidosirenoidei and Ceratodontoidei) and three families (Lepidosirenidae, Protopteridae, Ceratodontidae) (1).
Matthew P Heinickea +2 more
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Journal of Morphology, 1986
Problems surrounding the relationships of lungfishes are intricately connected with the search for the origin of tetrapods. Early in the history of lungfish research, the emphasis was on attempts to determine whether lungfishes were more closely related to fishes or to tetrapods.
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Problems surrounding the relationships of lungfishes are intricately connected with the search for the origin of tetrapods. Early in the history of lungfish research, the emphasis was on attempts to determine whether lungfishes were more closely related to fishes or to tetrapods.
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Nitrogen metabolism in the African lungfish
Comparative Biochemistry and Physiology, 1968Abstract 1. 1. The free amino acid concentration and glutamate dehydrogenase (GDH) activity were similar in livers of unfed and estivating African lungfish. 2. 2. Glutamine synthetase was present in brain but undetectable in liver. 3. 3. Lungfish GDH was kinetically similar to amphibian GDH. 4. 4.
P A, Janssens, P P, Cohen
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Current Biology
Alice Clement introduces the lungfishes, a group of sarcopterygian fishes that uses lungs to breathe and is the living sister group to tetrapod vertebrates.
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Alice Clement introduces the lungfishes, a group of sarcopterygian fishes that uses lungs to breathe and is the living sister group to tetrapod vertebrates.
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The metabolism of the aestivating African lungfish
Comparative Biochemistry and Physiology, 19641. 1. Changes in the concentration of glycogen and urea and activities of key enzymes in protein and amino acid metabolism were measured in fed control, starved and aestivating African lungfish. 2. 2. The concentration of glycogen in the livers of starved and aestivating 3. fish was lower by 40 per cent than in controls.
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