squaliform
The Squaliformes are an order (biology), order of sharks that includes about 126 species in seven families.
Members of the order have two dorsal fins, which usually possess spines, they usually have a sharp head, no anal fin or nictitating me ...
shark
Sharks are a group of elasmobranch cartilaginous fish characterized by a ribless endoskeleton, dermal denticles, five to seven gill slits on each side, and pectoral fins that are not fused to the head. Modern sharks are classified within the ...
s. These deep-water sharks, found in temperate and tropical oceans throughout the world, are characterized by grey or brown bodies, large green eyes, and spines on both
dorsal fins
A dorsal fin is a fin on the back of most marine and freshwater vertebrates. Dorsal fins have evolved independently several times through convergent evolution adapting to marine environments, so the fins are not all homologous. They are found i ...
. These spines give them their name, from
Greek
Greek may refer to:
Anything of, from, or related to Greece, a country in Southern Europe:
*Greeks, an ethnic group
*Greek language, a branch of the Indo-European language family
**Proto-Greek language, the assumed last common ancestor of all kno ...
, ''kentron'' meaning "thorn" and φέρειν, ''pherein'' meaning "to bear".
The genus is present in the fossil record from the
Paleocene
The Paleocene ( ), or Palaeocene, is a geological epoch (geology), epoch that lasted from about 66 to 56 mya (unit), million years ago (mya). It is the first epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), ...
(''C. squamosus'') onwards.
Species
* ''
Centrophorus atromarginatus
The dwarf gulper shark (''Centrophorus atromarginatus'') is a dogfish of the family Centrophoridae.
Physical characteristics
The maximum total length recorded for the gulper shark is 5 ft (150 cm). Gulper shark pups average from 1 to 1.4 ft ( ...
''
Garman Garman is a surname or first name. Notable people with the name include:
Sports
* Ann Garman, All-American Girls Professional Baseball League player
* Judi Garman (born 1954), American softball coach
* Mike Garman (born 1949), American baseball pla ...
, 1913. (dwarf gulper shark)
* ''
Centrophorus granulosus
The gulper shark (''Centrophorus granulosus'') is a long and slender Squalidae, dogfish usually about three feet in length generally found in deep, murky waters all around the world. It is a light grayish brown, Countershading, paler ventrally, ...
''
Bloch
Bloch is a surname of German origin. Notable people with this surname include:
A
*Adele Bloch-Bauer (1881–1925), Austrian entrepreneur
*Albert Bloch (1882–1961), American painter
*Alexandre Bloch (1857–1919), French painter
*Alfred Bloch ( ...
Centrophorus lusitanicus
The lowfin gulper shark (''Centrophorus lusitanicus'') is a large deepwater dogfish in the family Centrophoridae.
Physical characteristics
The lowfin gulper shark has no anal fin, two dorsal fins (with spines with the first dorsabeing much long ...
Bleeker Bleeker is a Dutch occupational surname. Bleeker is an old spelling of ''(linnen)bleker'' ("linen bleacher").Centrophorus seychellorum'' Baranes, 2003 (Seychelles gulper shark)
* ''
Centrophorus squamosus
The leafscale gulper shark (''Centrophorus squamosus'') is a Squaliformes, dogfish of the family (biology), family Centrophoridae. ''C. squamosus'' is reported to have a lifespan of approximately 70 years, based on otolith ring counts. It was th ...
Ebert Ebert is a surname of German origin. Notable people with the surname include:
* Alex Ebert (born 1978), lead singer for the band Ima Robot
* Anton Ebert (1845–1896), Austrian painter
* Beanie Ebert (1902–1980), American football player
* Blan ...
& Compagno, 2008 (western gulper shark)
* '' Centrophorus zeehaani'' W. T. White, Ebert & Compagno, 2008 (southern dogfish)
* ''Centrophorus'' sp. A Not yet described (minigulper)
* ''Centrophorus'' sp. B Not yet described (slender gulper)
See also
*
List of prehistoric cartilaginous fish
This list of prehistoric cartilaginous fish genera is an attempt to create a comprehensive listing of all Genus, genera that have ever been included in the class chondrichthyes ''and'' are known from the fossil record. This list excludes purely v ...