|Range of the knifetooth dogfish (in blue)|
The knifetooth dogfish, is a harmless sleeper shark of the family Somniosidae, found in the eastern Atlantic, from Scotland to Spain, Portugal, and Senegal, and the southwest Pacific from New Zealand, between latitudes 58°N and 15°N, at depths of between 200 and 1,600 m. Its length is up to 1.1 m.
- Blasdale, T. & Valenti, S.V. 2009. Scymnodon ringens. The IUCN Red List of Threatened Species 2009: e.T161717A5487631. https://dx.doi.org/10.2305/IUCN.UK.2009-2.RLTS.T161717A5487631.en. Downloaded on 19 October 2017.
- Froese, Rainer and Pauly, Daniel, eds. (2014). "Scymnodon ringens" in FishBase. November 2014 version.
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