Scymnodon ringens

Barbosa Du Bocage & De Brito Capello, 1864

Knifetooth dogfish
Classification: Elasmobranchii Squaliformes Somniosidae

Reference of the original description
du Bocage, J.V.B. & de Brito Capello, F. (1864)
Sur quelques espèces inédites de Squalidae de la tribu Acanthiana Gray, qui fréquentent les côtes du Portugal. Proceedings of the Zoological Society of London, 1864, 260–263

Image of the original description

Scymnodon ringens Barbosa du Bocage & de Brito Capello, 1864

Synonyms / new combinations and misspellings
Centrophorus ringens, Scymnodon cf. ringens

Scymnodon ringens
Syntype: BMNH: 1867.7.23.3

Description :

Citation: Scymnodon ringens Barbosa Du Bocage & De Brito Capello, 1864: In: Database of modern sharks, rays and chimaeras,, World Wide Web electronic publication, Version 03/2024

Please send your images of "Scymnodon ringens" to

Scymnodon ringens Barbosa du Bocage & de Brito Capello, 1864, © FAO,
Common names
deu \(T\) Messerzahnhai, spa Bruja, spa Tiburón bruja, fra \(T\) Squale-grogneur commun, eng Knifetooth dogfish, por Arreganhada

Short Description
Black in color; small dorsal fin spines; short snout; small lanceolate teeth without cusplets in upper jaw and huge high, knife-cusped cutting teeth in lower jaw; mouth very wide and broadly arched; caudal fin with weak subterminal notch and no lower lobe [518].

Eastern Atlantic: along the slope from Scotland to Spain, Portugal, Senegal. Southwest Pacific: New Zealand [578]. Source:

Human uses
fisheries: minor commercial; price category: not marketed/unknown; price reliability:

Probably ovoviviparous [518]. Distinct pairing with embrace [17086].

Size / Weight / Age
110 cm TL (male/unsexed; [518])

bathypelagic; marine; depth range 200 - 1600 m [518], usually 550 - 1450 m [20048]

tooth formula (upper/lower): 24-25/14-15 [1131];

Links: SEM-images of teeth

shark-references Species-ID=6443;