Squaliformes

From Free net encyclopedia

{{Taxobox | color = pink | name = Squaliformes | image = Gulper shark.png | image_width = 250px | image_caption = Gulper shark, Centrophorus granulosus | regnum = Animalia | phylum = Chordata | classis = Chondrichthyes | ordo = Squaliformes | ordo_authority = Goodrich, 1909 | subdivision_ranks = Families | subdivision = Squalidae (dogfish sharks)
Centrophoridae (gulper sharks)
Dalatiidae (sleeper sharks)
Echinorhinidae (bramble sharks) }} Squaliformes is an order of sharks that includes the smooth dogfish and spiny dogfish and others, about 80 species in four families.

Members of the order have two dorsal fins, no anal fin, and no nictitating membrane. They have five gill slits.

Classification

Family Echinorhinidae

Family Centrophoridae

Family Dalatiidae

Family Squalidae

References

fr:Squaliforme nl:Doornhaaiachtigen pl:Koleniokształtne pt:Squaliformes zh:角鲨目