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The South American lungfish (Lepidosiren paradoxa), also known as the American mud-fish [6] and scaly salamanderfish, [7] is the single species of lungfish found in swamps and slow-moving waters of the Amazon, Paraguay, and lower Paraná River basins in South America. [8]
The South American lungfish is an extraordinary creature - in some sense, a living fossil. Inhabiting slow-moving and stagnant waters in Brazil, Argentina, Peru, Colombia, Venezuela, French Guiana ...
South American lungfish. The South American lungfish, Lepidosiren paradoxa, is the single species of lungfish found in swamps and slow-moving waters of the Amazon, Paraguay, and lower Paraná River basins in South America. Notable as an obligate air-breather, it is the sole member of its family native to the Americas.
All members of the order are obligatory air-breathers; only the Australian lungfish has functioning gills when adult; members of the Lepidosirenidae have gills only when they are larvae. [5] The South American and African lungfish also all have generally small scales and two lungs as opposed to the Australian lungfish's single lung. [5]
Researchers found that the South American lungfish has 90 billion base pairs in its genetic code thanks to “jumping genes,” which have continued to expand the length of the fish’s sequence ...
Unlike the South American and African lungfishes, the Australian species has gills on all the first four gill arches, while the fifth arch bears a hemibranch. It is also the only facultative air breather lungfish species, only breathing air when oxygen in the water is not sufficient to meet their needs.
The Gnathorhizidae are an extinct family of lungfish that lived from the late Carboniferous until the middle Triassic. Gnathorhizid fossils have been found in North America, Madagascar, Australia, and possibly Eastern Europe and South Africa. They are characterized by high-ridged toothplates that form cutting blades and a reduction in cranial ...
South American lungfish This page was last edited on 20 August 2015, at 17:40 (UTC). Text is available under the Creative Commons Attribution-ShareAlike 4.0 ...