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Dogfish sharks: Order squaliform
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Species of Dogfish sharks
Family Somniosidae - Sleeper Sharks - 18 species 

Red indicates inclusion on the IUCN Red List of Endangered Species. 

Order Squaliformes - Dogfish Sharks
     Family Somniosidae - Sleeper Sharks      
 Species
 Common name
          Genus Centroscymnus
Centroscymnus coelolepis
 Portuguese Dogfish
 Centroscymnus owstoni
 Roughskin Dogfish
          Genus Centroselachus
Centroselachus crepidator
 Longnose Velvet Dogfish
          Genus Proscymnodon
Proscymnodon macracanthus
 Largespine Velvet Dogfish
Proscymnodon plunketi
 Plunket Shark
          Genus Scymnodalatias
Scymnodalatias albicauda
 Whitetail Dogfish
Scymnodalatias garricki
 Azores Dogfish
Scymnodalatias oligodon
 Sparsetooth Dogfish
Scymnodalatias sherwoodi
Sherwood Dogfish
          Genus Scymnodon
Scymnodon ringens
 Knifetooth Dogfish
          Genus Somniosus
Somniosus antarcticus
 Southern Sleeper Shark
  Somniosus longus
 Frog Shark
Somniosus microcephalus
 Greenland Shark
Somniosus pacificus
 Pacific Sleeper Shark
Somniosus rostratus
 Little Sleeper Shark
Somniosus sp?
 Longnose Sleeper Shark
          Genus Zameus
Zameus ichiharai
 Japanese Velvet Dogfish
Zameus squamulosus Velvet Dogfish