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Frilled shark
Fossil range: Campanian to Present[1]

Conservation status
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Chondrichthyes
Subclass:Elasmobranchii
Order:Hexanchiformes, proposed Clamydoselachiformes
Family:Chlamydoselachidae
Garman, 1884
Genus:Chlamydoselachus
Species:C. The Campanian is a stage on the Geologic time scale occurring from 83 The conservation status of a Species is an indicator of the likelihood of that species remaining extant either in the present day or the near future Near Threatened ( NT) is a Conservation status assigned to species or lower taxa which may be considered threatened with extinction in the near future although The IUCN Red List of Threatened Species (also known as the IUCN Red List or Red Data List) created in 1963 is the world's most comprehensive inventory of the global Chordates ( Phylum Chordata) are a group of Animals that includes the Vertebrates together with several closely related Invertebrates Chondrichthyes or cartilaginous fishes are jawed Fish with paired fins paired nostrils scales two-chambered hearts and skeletons made of Cartilage rather Elasmobranchii is the subclass of Cartilaginous fish that includes Skates rays (batoidea, and sharks (selachii. Hexanchiformes is the order consisting of the most primitive types of Sharks and numbering just five extant species Samuel Walton Garman (1843-1927 was a naturalist / Zoologist from Pennsylvania anguineus
Binomial name
Chlamydoselachus anguineus
Garman, 1884
Range of frilled shark (in blue)
Range of frilled shark (in blue)

The frilled shark, Chlamydoselachus anguineus, is a primitive shark species, of the family Chlamydoselachidae in the order Hexanchiformes. Year 1884 ( MDCCCLXXXIV) was a Leap year starting on Tuesday (link will display the full calendar of the Gregorian calendar (or a Leap year Sharks ( Superorder Selachimorpha) are a type of Fish with a full cartilaginous Skeleton and a highly streamlined body In Biological classification, family ( Latin This article is about the taxonomic rank for the sequence of species in a taxonomic list see Taxonomic order In scientific classification used Hexanchiformes is the order consisting of the most primitive types of Sharks and numbering just five extant species The Southern African frilled shark is a proposed new species from the Southern African range. The Southern African frilled shark, Chlamydoselachus sp A, is a primitive Shark of the family Chlamydoselachidae in the order These two species are very different from the other hexanchiform sharks, and it has recently been proposed that the two frilled sharks should be given their own order: Chlamydoselachiformes. Additional extinct types are known from fossil teeth; thought to be extinct itself, it was only discovered in Japanese waters in the 19th century. FOSSIL is a standard protocol for allowing serial communication for Telecommunications programs under the DOS Operating system. For a topic outline on this subject see List of basic Japan topics. The 19th century of the Common Era began on January 1, 1801 and ended on December 31, 1900, according to the Gregorian calendar [2] On January 21, 2007 a specimen was found alive off the coast of Japan near the Awashima Marine Park in Shizuoka, southwest of Tokyo. Events 1189 - Philip II of France and Richard I of England begin to assemble troops to wage the Third Crusade. Year 2007 ( MMVII) was a Common year starting on Monday of the Gregorian calendar in the 21st century. For a topic outline on this subject see List of basic Japan topics. WikipediaWikiProject Japanese prefectures for guidelines--> is a prefecture of Japan located in the Chūbu region on Honshū Island officially, is one of the 47 prefectures of Japan and located on the eastern side of the main island Honshū. The shark was captured but, being in poor health, died shortly afterwards. [3]

Contents

Appearance

A preserved specimen
A preserved specimen

Superficially, the frilled shark resembles a dark brown or grey eel, but the six gill slits identify it as a shark. True eels ( Anguilliformes) are an order of Fish, which consists of four suborders 19 families 110 Genera and approximately 600 Gill slits are Gills with individual openings rather than an outer cover The tissue of the gill slits protrudes somewhat, thus inspiring the common name. Its dorsal fin is small, anal fin large, and the caudal fin (tail fin) is highly asymmetric, the dorsal part almost unnoticeable. A dorsal fin is a Fin located on the backs of some Fishes Whales Dolphins and Porpoises as well as the (extinct The Anatomy of Fish is primarily governed by the physical characteristics of Water, which is much denser than air holds a relatively small amount of dissolved The Anatomy of Fish is primarily governed by the physical characteristics of Water, which is much denser than air holds a relatively small amount of dissolved Its teeth are small, tricuspid, and very sharp. It has been recorded at up to 2 m in length.

Distribution

Distribution is worldwide, but they are very rarely found in shallow water. They have been reported in all oceans but are mainly found near Norway, South Africa, New Zealand, and Chile. An ocean (from Greek, ''Okeanos'' (Oceanus) is a major body of saline water, and a principal component of the Hydrosphere. Norway ( Norwegian: Norge ( Bokmål) or Noreg ( Nynorsk) officially the Kingdom of Norway, is a Constitutional The Republic of South Africa (also known by other official names) is a country located at the southern tip of the continent of Africa New Zealand is an Island country in the south-western Pacific Ocean comprising two main landmasses (the North Island and the South Island Chile, officially the Republic of Chile ( Spanish:) is a country in South America occupying a long and narrow Coastal strip wedged between the The sharks are usually found at depths of between 50 m and 1,500 m. They typically eat squid, other sharks, and deepwater bony fish. Squid are marine Cephalopods of the order Teuthida, which comprises around 300 species Osteichthyes (ˌɒstiːˈɪkθiːz also called bony fish, are a taxonomic Class of Fish that includes the ray-finned fish ( Actinopterygii [4]The frilled shark is sometimes referred to as a living fossil partially because the species has changed little since pre-historic times. Living fossil is an informal term for any living Species (or Clade) of organism which appears [5]

Reproduction

Reproduction is not well understood, but like many other sharks they bear live young (ovoviviparous), with litter sizes of 2 to 12 pups. Ovoviviparous Animals develop within eggs that remain within the mother's body up until they hatch or are about to hatch Compagno states "They are pregnant for a long time, probably one to two years". Leonard J V Compagno is an international authority on shark taxonomy and the author of many scientific papers and books on the subject best known of which is his 1984 catalogue of shark

Sightings

The first known video footage of a frilled shark in its natural habitat.
The first known video footage of a frilled shark in its natural habitat.

Frilled sharks appear regularly in the catches from bottom trawling, and when caught are used as food or for fishmeal. Bottom trawling is Trawling (towing a trawl, which is a Fishing net) along the sea floor Fish meal, or fishmeal, is a commercial product made from both whole Fish and the bones and Offal from processed fish [4]

On January 21, 2007, staff at Awashima Marine Park in Shizuoka, southwest of Tokyo, were alerted by fishermen to a 'strange eel-like fish with razor sharp teeth'. Events 1189 - Philip II of France and Richard I of England begin to assemble troops to wage the Third Crusade. Year 2007 ( MMVII) was a Common year starting on Monday of the Gregorian calendar in the 21st century. WikipediaWikiProject Japanese prefectures for guidelines--> is a prefecture of Japan located in the Chūbu region on Honshū Island officially, is one of the 47 prefectures of Japan and located on the eastern side of the main island Honshū. True eels ( Anguilliformes) are an order of Fish, which consists of four suborders 19 families 110 Genera and approximately 600 Fish are aquatic Vertebrate animals that are typically ectothermic (previously Cold-blooded) covered with scales, and equipped with two A razor is a Bladed Tool primarily used in the Shaving off of unwanted Body hair. The fish was identified as a pregnant female 1. Female (♀ is the Sex of an Organism, or a part of an organism which produces ova (egg cells 6 m frilled shark and was captured by park staff who were concerned that the shark appeared to be unhealthy. The metre or meter is a unit of Length. It is the basic unit of Length in the Metric system and in the International They took it out of the water and put it into a salt water tank where they filmed it and took pictures of it. The shark died a few hours after capture. This rare surface appearance of a frilled shark has been attributed to the animal being unwell and possibly disoriented. [6]

See also

References

  1. ^ Sepkoski, Jack (2002). Shark classification Sharks belong to the superorder Selachimorpha in the subclass Elasmobranchii in the class Chondrichthyes. Hexanchiformes is the order consisting of the most primitive types of Sharks and numbering just five extant species "A compendium of fossil marine animal genera (Chondrichthyes entry)". Bulletins of American Paleontology 364: p. 560.  
  2. ^ Allen, Thomas B. (1999). The Shark Almanac. New York: The Lyons Press, 48. ISBN 1-55821-582-4.  
  3. ^ CBS news story. Accessed 2007-01-25
  4. ^ a b Compagno (1984). Year 2007 ( MMVII) was a Common year starting on Monday of the Gregorian calendar in the 21st century. Events 41 - After a night of negotiation Claudius is accepted as Roman Emperor by the Senate Leonard J V Compagno is an international authority on shark taxonomy and the author of many scientific papers and books on the subject best known of which is his 1984 catalogue of shark Sharks of the World: An annotated and illustrated catalogue of shark species known to date. Food and Agriculture Organization of the United Nations, 14-15.  
  5. ^ National Geographic News Photo Gallery: Rare "Prehistoric" Shark Photographed Alive
  6. ^ Rare shark captured on film. CNN. Retrieved on 2007-01-24. Year 2007 ( MMVII) was a Common year starting on Monday of the Gregorian calendar in the 21st century. Events 41 - Gaius Caesar (Caligula, known for his eccentricity and cruel Despotism, is Assassinated by his disgruntled
General references

External links

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