Latimeria chalumnae

Latimeria chalumnae , Photo: Michael Lahanas

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Osteichthyes
Classis: Sarcopterygii
Subclassis: Coelacanthimorpha
Ordo: Coelacanthiformes
Familia: Latimeriidae
Genus: Latimeria
Species: Latimeria chalumnae

Name

Latimeria chalumnae Smith, 1939

Latimeria chalumnae,

References

* IUCN link: Latimeria chalumnae Smith, 1939 (Critically Endangered)

Vernacular names
Internationalization
Česky: Latimérie podivná
Español: Celacanto de las Comores
Suomi: Latimeria

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West Indian Ocean coelacanth (Latimeria chalumnae) is a species of coelacanth, known for its vivid blue pigment. It is the better known of the two extant species.

Biological characteristics
The average weight of the living West Indian Ocean coelacanth, Latimeria chalumnae, is 80 kg (176 lb), and they can reach up to 2 m (6.5 ft) in length. Adult females are slightly larger than males. L. chalumnae is widely but very sparsely distributed around the rim of the western Indian Ocean, from South Africa northward along the east African coast to Kenya, the Comoros and Madagascar, seemingly occurring in small colonies.

Population and conservation

In accordance with the Convention on International Trade of Endangered Species treaty, the coelacanth was added to Appendix I (threatened with extinction) in 1989. The treaty forbids international trade for commercial purposes and regulates all trade, including sending specimens to museums, through a system of permits. In 1998, the total population of the West Indian Ocean coelacanth was estimated to have been 500 or fewer, a number that would threaten the survival of the species.[1] L. chalumniae is listed as critically endangered and L. menadoensis is listed as vulnerable by IUCN.[2][3]

First find in South Africa

On December 23, 1938, Hendrik Goosen, the captain of the trawler Nerine, returned to the harbour at East London, South Africa, after a trawl between the Chalumna and Ncera Rivers. As he frequently did, he telephoned his friend, Marjorie Courtenay-Latimer, curator at East London's small museum, to see if she wanted to look over the contents of the catch for anything interesting, and told her of the strange fish he had set aside for her. Correspondence in the archives of the South African Institute for Aquatic Biodiversity (SAIAB, formerly the JLB Smith Institute of Ichthyology) show that Goosen went to great lengths to avoid any damage to this fish and ordered his crew to set it aside for the East London Museum. Goosen later told how the fish was steely blue when first seen but by the time the Nerine entered East London harbour many hours later the fish had become dark grey.

Failing to find a description of the creature in any of her books, she attempted to contact her friend, Professor James Leonard Brierley Smith, but he was away for Christmas. Unable to preserve the fish, she reluctantly sent it to a taxidermist. When Smith returned, he immediately recognized it as a coelacanth, known only from fossils. Smith named the fish Latimeria chalumnae in honor of Marjorie Courtenay-Latimer and the waters in which it was found. The two discoverers received immediate recognition, and the fish became known as a "living fossil." The 1938 coelacanth is still on display in the East London, South Africa, museum.

However, as the specimen had been stuffed, the gills and skeleton were not available for examination, and some doubt therefore remained as to whether it was truly the same species. Smith began a hunt for a second specimen that would take more than a decade.

References

1. ^ Jewett, Susan L., "On the Trail of the Coelacanth, a Living Fossil", The Washington Post, 1998-11-11, Retrieved on 2007-06-19.
2. ^ "IUCN Redlist--L. chalumnae". http://www.iucnredlist.org/apps/redlist/details/11375/0/full. Retrieved 2009-02-28.
3. ^ "IUCN Redlist--L. menadoensis". http://www.iucnredlist.org/apps/redlist/details/135484/0/full. Retrieved 2009-02-28.

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