Deania is a genus of long-snouted, deepwater dogfish sharks in the family Centrophoridae. Species Deania calcea R. T. Lowe, 1839 (birdbeak dogfish) Deania hystricosa Garman, 1906 (rough longnose dogfish) Deania profundorum H. M. Smith & Radcliffe, 1912 (arrowhead dogfish) Deania quadrispinosa McCulloch, 1915 (longsnout dogfish) Habitats In the North Atlantic Waters, three species of the genus Deania have been reported; Deania calcea, Deania hystricosa and Deania profundorum. However, in the North Spanish waters, only Deania calcea and Deania profundorum have been caught. Taxonomy Deania species have two dorsal fins with strong grooved spines, no anal fin, and a strong sub terminal notch on the caudal fin. Typically, identification characteristics such as dermal denticles and teeth have been utilized to distinguish between elasmobranch species. See also List of prehistoric cartilaginous fish References Sources Tony Ayling & Geoffrey Cox, Collins Guide to the Sea Fishes of New Zealand, (William Collins Publishers Ltd, Auckland, New Zealand 1982) Aquitanian genus first appearances Extant Miocene first appearances Shark genera Taxa named by David Starr Jordan Taxa named by John Otterbein Snyder