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Dalatiidae

 
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Dalatiidae
 
 
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Dalatiidae is a family of shark
Shark

Sharks are a type of fish with a full Cartilage skeleton and a highly Streamlines, streaklines and pathlinesd body. They respire with the use of five to seven gill slits....
s, commonly known as sleeper sharks. They are found worldwide.

All members of the family except for the Pacific sleeper shark
Pacific sleeper shark

The Pacific sleeper shark, Somniosus pacificus, is a sleeper shark of the family Dalatiidae, found circumglobally on continental shelves and slopes in temperate waters between latitudes 70th parallel north and 47th parallel south, from the surface to 2,000 m....
, Somniosus pacificus, have luminescent organs. These are mostly located on the fish's underside, and appear as small dots. The sharks in this family vary greatly in size, from the smallest of all sharks, the dwarf lantern shark, at in adult body length, to the large Greenland shark
Greenland shark

The Greenland shark, Somniosus microcephalus, also known as the sleeper shark, gurry shark, ground shark, grey shark, or by the Inuit Eqalussuaq, is a large shark native to the waters of the Atlantic Ocean around Greenland and Iceland....
, at up to in length.








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Dalatiidae is a family of shark
Shark

Sharks are a type of fish with a full Cartilage skeleton and a highly Streamlines, streaklines and pathlinesd body. They respire with the use of five to seven gill slits....
s, commonly known as sleeper sharks. They are found worldwide.

All members of the family except for the Pacific sleeper shark
Pacific sleeper shark

The Pacific sleeper shark, Somniosus pacificus, is a sleeper shark of the family Dalatiidae, found circumglobally on continental shelves and slopes in temperate waters between latitudes 70th parallel north and 47th parallel south, from the surface to 2,000 m....
, Somniosus pacificus, have luminescent organs. These are mostly located on the fish's underside, and appear as small dots. The sharks in this family vary greatly in size, from the smallest of all sharks, the dwarf lantern shark, at in adult body length, to the large Greenland shark
Greenland shark

The Greenland shark, Somniosus microcephalus, also known as the sleeper shark, gurry shark, ground shark, grey shark, or by the Inuit Eqalussuaq, is a large shark native to the waters of the Atlantic Ocean around Greenland and Iceland....
, at up to in length.

Subfamilies, Tribes, and Species

In some classifications this family includes the genera Centrophorus
Centrophorus

Centrophorus is a genus of squaliform sharks. They are deep-water sharks found in temperate and tropical oceans throughout the world. They are characterized by grey or brown bodies, large green eyes, and spines on both dorsal fins....
, Cirrhigaleus
Cirrhigaleus

Cirrhigaleus is a genus of squaliform sharks in the family Squalidae ....
 and Deania
Deania

Deania is a genus of long-snouted, deepwater dogfish sharks in the family Centrophoridae....
 but this article follows FishBase
FishBase

FishBase is a comprehensive database of information about fish. , it included descriptions of over 30,000 species, over 260,000 common names in hundreds of languages, over 46,000 pictures, and references to more than 42,000 works in the scientific literature....
 in placing those genera in the families Centrophoridae
Centrophoridae

The gulper sharks are a family of squaliform sharks. The family contains just two genus and approximately 15 species.These are generally deepwater fish....
 (Centrophorus and Deania) and Squalidae
Squalidae

Squalidae is the family of dogfish sharks. They are found in the Atlantic, Pacific, and Indian oceans, from tropical equatorial climates to the Arctic and Antarctic....
 (Cirrhigaleus).

In other classifications, including that used at FishBase, the subfamilies are raised to the level of the families Etmopteridae, Oxynotidae, and Somniosidae.

Family Dalatiidae
  • Subfamily Dalatiinae (Gray
    John Edward Gray

    John Edward Gray was a United Kingdom zoology. He was the elder brother of George Robert Gray and son of the pharmacologist and botanist Samuel Frederick Gray ....
    , 1851)
    • Genus Euprotomicroides
    • Genus Heteroscymnoides
    • Genus Mollisquama
    • Tribe Dalatiini
      • Genus Dalatias
      • Genus Isistius
        Isistius

        Isistius is a genus of squaliform sleeper sharks in the family Dalatiidae....
    • Tribe Euprotomicrini
      • Genus Euprotomicrus
      • Genus Squaliolus
        Squaliolus

        Squaliolus is a genus of squaliform sleeper sharks in the family Dalatiidae....
  • Subfamily Etmopterinae Fowler, 1934
    • Genus Aculeola
    • Genus Centroscyllium
      Centroscyllium

      Centroscyllium is a genus of big-eyed deepwater dogfishes with no anal fin, a grey or black-brown body, and dorsal spines, with the second one being much larger than the first....
    • Genus Etmopterus
      Etmopterus

      Etmopterus, also known as the lantern sharks, is a genus of squaliform sharks in the family Dalatiidae....
    • Genus Miroscyllium
    • Genus Trigonognathus
  • Subfamily Oxynotinae Gill
    Theodore Gill

    Theodore Nicholas Gill was an United States ichthyologist, mammalogist, malacologist and librarian.Born and educated in New York City under private tutors, Gill early showed interest in natural history....
    , 1872
    • Genus Oxynotus
      Oxynotus

      Oxynotus is a genus of sharks in the order Squaliformes, commonly known as the rough sharks. It is the only genus in the family Oxynotidae....
  • Subfamily Somniosinae Jordan
    David Starr Jordan

    David Starr Jordan, Ph.D., LL.D. was a leading eugenics, ichthyologist , educator and peace activist. He was president of Indiana University and Stanford University....
    , 1888
    • Genus Centroscymnus
      Centroscymnus

      Centroscymnus is a genus of squaliform sleeper sharks in the family Dalatiidae....
    • Genus Scymnodalatias
      Scymnodalatias

      Scymnodalatias is a genus of squaliform sharks in the family Dalatiidae....
    • Genus Scymnodon
      Scymnodon

      Scymnodon is a genus of squaliform sharks in the family Dalatiidae....
    • Genus Somniosus
      Somniosus

      Somniosus is a genus of squaliform sleeper sharks in the family Dalatiidae....