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Coelacanth eggs are large, with only a thin layer of membrane to protect them. Embryos hatch within the female and eventually are born alive, which is a rarity in fish. This was only discovered when the American Museum of Natural History dissected its first coelacanth specimen in 1975 and found it pregnant with five embryos. [67]
Latimeria is the type genus of Latimeriidae, a group of coelacanths that first appeared in the Early Triassic. Within Latimeriidae, it has been found by cladistic analysis to be most closely related to the genus Swenzia , known from the Late Jurassic of Europe, leaving a long ghost lineage of over 150 million years from its closest relative.
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.
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 southeastern ...
Binomial name. †Coelacanthus granulatus. Agassiz, 1839. Coelacanthus ("hollow spine") is a genus of extinct marine coelacanths known from the late Permian period. It was the first genus of coelacanths described, about a century before the discovery of the extant coelacanth Latimeria. [1] The order Coelacanthiformes is named after it.
It has the same white mottling pattern as the West Indian Ocean coelacanth, but with flecks over the dorsal surface of its body and fins that appear golden due to the reflection of light. [9] It may grow to 1.4 meters long. [17] [16] DNA analysis has shown that the specimen obtained by Erdmann differed genetically from the Comorian population.
East London Museum. 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 ...
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.