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
Slyne-Erris Trough Slyne Transfer, interpreted to be a splay of the Great Glen Fault. The Corrib Field is situated in the Northern Slyne Basin. In the Central Slyne the 27/5-1 well proved the presence of Late Permian evaporites including salt, possibly indicating fault activity at this time. The basin is interpreted to have been active particularly during the Triassic and Middle Jurassic periods. The Slyne Basin links the Erris and Porcupine Basins. The Erris Trough or Erris Basin is a half-graben that runs parallel with the Rockall Basin and is separated from it by a horst structure, the Erris Ridge. It is