Longsnout dogfish - Deania quadrispinosum Family SQUALIDAE - Dogfish sharks Deania quadrispinosum No links at the moment. Deania quadrispinosum ITIS 'Other Source' Search results for FAO
Deania profundorum (Smith and Radcliffe in Smith, 1912) -- valid -- arrowhead dogfish.
http://www.itis.usda.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=160749