. Atlas and zoogeography of common fishes in the Bering Sea and Northeastern Pacific / M. James Allen, Gary B. Smith. Fishes Bering Sea Geographical NORTHERN SMOOTHTONGUE, Leuroglossus schmidti Rass 1955 Bathylagidae: Deepsea Smelts Taxonomic comment Regarded as a subspecies of the California smoothtongue, Leuroglossus stilbius Gilbert 1890, during much of the period covered by these surveys; hence this species was called California smoothtongue in the field. Peden (1981) presented evidence to separate the northern and California smoothtongue as distinct species. The California
. Atlas and zoogeography of common fishes in the Bering Sea and Northeastern Pacific / M. James Allen, Gary B. Smith. Fishes Bering Sea Geographical NORTHERN SMOOTHTONGUE, Leuroglossus schmidti Rass 1955 Bathylagidae: Deepsea Smelts Taxonomic comment Regarded as a subspecies of the California smoothtongue, Leuroglossus stilbius Gilbert 1890, during much of the period covered by these surveys; hence this species was called California smoothtongue in the field. Peden (1981) presented evidence to separate the northern and California smoothtongue as distinct species. The California smoothtongue is Bathylagus stilbius in Robins (1980). Dunn (1983) presented detailed evidence for placing the two species in the genus Leuroglossus. Ahlstrom et al. (1984b), however, continue to regard the two species as Bathylagus. Literature Reported from southeastern Hokkaido, Japan, and the Sea of Okhotsk to southern Vancouver Island, British Columbia (Borodulina 1968; Peden 1981). Species is pelagic and the eggs and larvae are found in the subarctic gyre south to about lat. 47°N (Dunn 1983). Reported from the surface to 1800 m (Fedorov 1973a), although adults are generally found at depths >150 m during the day (Peden 1981). Survey data Taken in surveys along the slope of the eastern Bering Sea from Navarin Canyon to Unimak Island and along the Aleutian Islands to Attu Island; also taken off Baranof Island in southeastern Alaska. Depth range 275 to 975 m, most frequently ( of occur- rences) on the mesobenthal slope between 400 and 450 m, and of occurrences between 250 and 900 m in depth. Although neither the known geographic nor depth range of this species were extended by the survey data, the depth range of frequent occurrence was more precisely defined. In addition, it should be noted that although the northern smoothtongue is a mesopelagic species, it was captured only along the slope. This probably reflects the distribution of demersal trawl tows rather t
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