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Coelacanths (/ ˈ s iː l ə k æ n θ / ⓘ SEE-lə-kanth) (order Coelacanthiformes) are an ancient group of lobe-finned fish (Sarcopterygii) in the class Actinistia. [ 2 ] [ 3 ] As sarcopterygians, they are more closely related to lungfish and tetrapods (which includes amphibians , reptiles , birds and mammals ) than to ray-finned fish .
Latimeria is a rare genus of fish which contains the only living species of coelacanth. It includes two extant species: the West Indian Ocean coelacanth ( Latimeria chalumnae) and the Indonesian coelacanth ( Latimeria menadoensis ). They follow the oldest known living lineage of Sarcopterygii (lobe-finned fish and tetrapods ), which means they ...
Marjorie Eileen Doris Courtenay-Latimer (24 February 1907 – 17 May 2004) was a South African museum official, who in 1938, brought to the attention of the world the existence of the coelacanth, a fish thought to have been extinct for 65 million years. Marjorie Courtenay-Latimer discovered this coelacanth, formerly only seen in fossils ...
Latimeriidae. Latimeriidae is the only extant family of coelacanths, an ancient lineage of lobe-finned fish. It contains two extant species in the genus Latimeria, found in deep waters off the coasts of southern Africa and east-central Indonesia. In addition, several fossil genera are known from the Mesozoic of Europe, the Middle East, and the ...
Coelacanths were thought to be extinct until a live one was caught in South Africa in 1938. Others have been seen and photographed since then. They're usually found in deep, dark waters.
The evolution of fish began about 530 million years ago during the Cambrian explosion. It was during this time that the early chordates developed the skull and the vertebral column, leading to the first craniates and vertebrates. The first fish lineages belong to the Agnatha, or jawless fish. Early examples include Haikouichthys.
Mawsonia is an extinct genus of prehistoric coelacanth fish. It is amongst the largest of all coelacanths, with one quadrate specimen (DGM 1.048-P) possibly belonging to an individual measuring 5.3 metres (17.4 feet) in length. [ 2] It lived in freshwater and brackish environments from the late Jurassic to the mid- Cretaceous ( Tithonian to ...
The West Indian Ocean coelacanth[ 6] ( Latimeria chalumnae) (sometimes known as gombessa, [ 2][ 7] African coelacanth, [ 8] or simply coelacanth[ 9]) is a crossopterygian, [ 10] one of two extant species of coelacanth, a rare order of vertebrates more closely related to lungfish and tetrapods than to the common ray-finned fishes.