Family Gonostomatidae 179bristlemouths Marine Atlantic Indian and Pacific

Body elongate, never extremely compressed; adipose fins present or absent; anal fin rays 16-31; branchiostegal rays, 12-16, 4-6 on epihyal (= posterior ceratohyal); 8-16 branchiostegal photophores; photophores on isthmus; vertebrae 29-40.

With the removal of the genera Diplophos, Manducus, and Triplophos (see above), a monophyletic Gonostomatidae is reduced to five genera.

Five genera, Bonapartia, Cyclothone, Gonostoma, Margyrethia, and Sigmops, with 23 species (Miya, 1994; Miya and Nishida, 2000; Harold, 1998, 2003). Cyclothone, with 13 species, is probably a synonym of Gonostoma, but Harold (1998) did not change the classification pending further studies. Cyclothone occurs in virtually all seas including the Antarctic; it and Vinciguerria have the greatest abundance of individuals of any vertebrate genera in the world.

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