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Rhipidistia includes Porolepiformes and Dipnoi. Extensive fossilization of lungfishes has contributed to many evolutionary studies of this group. Evolution of autostylic jaw suspension, in which the palatoquadrate bone fuses to the cranium, and the lymph pumping " lymph heart " (later lost in mammals and flying birds ), are unique to this group.
Relatively little is known about the South American lungfish, [21] or scaly salamander-fish. [22] When immature it is spotted with gold on a black background. In the adult this fades to a brown or gray color. [23] Its tooth-bearing premaxillary and maxillary bones are fused like other lungfish.
Porolepiformes is an order of prehistoric lobe-finned fish which lived during the Devonian period (about 416 to 359 million years ago). They are thought to represent the sister group to lungfish (class Dipnoi). [1] The group contains two families: Holoptychiidae and Porolepididae.
Sarcopterygii (/ ˌ s ɑːr k ɒ p t ə ˈ r ɪ dʒ i. aɪ /; from Ancient Greek σάρξ (sárx) 'flesh' and πτέρυξ (ptérux) 'wing, fin') — sometimes considered synonymous with Crossopterygii (from Ancient Greek κροσσός (krossós) 'fringe') — is a clade (traditionally a class or subclass) of vertebrate animals which includes a group of bony fish commonly referred to as lobe ...
The South American lungfish is an extraordinary creature - in some sense, a living fossil. ... the largest-known animal genome was that of another lungfish, the Australian lungfish, Neoceratodus ...
The West African lungfish is historically known as a unique species and an early precursor of fish to tetrapods. Due to its monophyletic clade, Dipnoi, it is the sister group to the tetrapods; this is attributed to its distinctive physiology and inferred data from fossil and taxa records.
Also known as the leopard lungfish, it is found in Eastern and Central Africa, as well as the Nile region. At 133 billion base pairs , [ 4 ] it has the largest known genome of any animal and one of the largest of any organism , along with the flowering plant Paris japonica , the fern Tmesipteris oblanceolata and the protist Polychaos dubium at ...
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]