Black dogfish to the clade formed by the granular dogfish ("C. granulatum") and combtooth dogfish ("C. nigrum"). The black dogfish is a common species, with a wide but discontinuous distribution in the temperate waters of the Atlantic Ocean; its range abuts, but does not extend into, the Arctic Ocean. In the northeast, it occurs from Iceland to Sierra Leone, including the Faroe Islands, southern Norway, and the Rockall Trough and Porcupine Seabight off Ireland. In the northwest, it is found from southern Greenland and Baffin Island to Virginia, being particularly abundant in the Laurentian Channel, and may occur further south to the
Rockall Bank dispute "Faroes-Rockall Plateau", an "elevated plain with its summit in the Faroe Islands". Iceland does not claim the rock itself, considering it irrelevant as far as delimitation of EEZs and continental shelf is concerned. Iceland however claims an extended continental shelf in the Hatton-Rockall area. Despite its long history of human habitation into the 20th century, Iceland considers St. Kilda to be "a minuscule, effectively uninhabited, islet, categorized under article 121(3) of the Law of the Sea Convention". Furthermore, St. Kilda lies outside the British territorial sea limit. Therefore, it is not an "equitable basepoint for an equidistant line". Iceland ratified