Scymnodon ringens Barbosa du Bocage & de Brito Capello, 1864

Knifetooth dogfish

Catalog of Fishes (gen., sp.) | ITIS | CoL

Classification	Elasmobranchii \| Squaliformes \| Somniosidae
Synonyms	... more
Common names	Squale-grogneur commun, Bruja, Knorrhaj, ... more

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Image of Scymnodon ringens (Knifetooth dogfish)

Picture by Serrano, A.

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This map was computer-generated and has not yet been reviewed.

AquaMaps Data sources: GBIF OBIS

Main reference

Compagno, L.J.V. 1984. (Ref. 247)
Other references | Biblio | Coordinator | Collaborators

Size / Weight / Age

Max length : 110 cm TL male/unsexed; (Ref. 247)

Environment

Bathypelagic; marine; depth range 200 - 1600 m (Ref. 247), usually 550 - 1450 m (Ref. 10717)

Climate / Range

Deep-water; 58°N - 15°N

Eastern Atlantic: along the slope from Scotland to Spain, Portugal, Senegal. Southwest Pacific: New Zealand (Ref. 26346).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Anal spines: 0. 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 (Ref. 247).

A rare species (Ref. 26346) inhabiting continental slopes (Ref. 247). Usually mesopelagic although taken most often near the bottom (Ref. 10717). Its razor-edged lower teeth is used to attack and dismember large prey (Ref. 247). Ovoviviparous (Ref. 205). Utilized dried salted for human consumption and for fishmeal (Ref. 247).


IUCN Red List Status (Ref. 57073)	Threat to humans
Not Evaluated	Traumatogenic

Human uses
Fisheries: minor commercial


More information
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Internet sources

Estimation of some characteristics with mathematical models

Phylogenetic diversity index (Ref. 82805)

PD₅₀ = 0.7500

Resilience (Ref. 69278)

Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100)


Vulnerability (Ref. 59153)	Price category (Ref. 80766)
High vulnerability (58 of 100)	Not marketed/unknown

Entered by Carpenter, Kent E.

Modified by Capuli, Estelita Emily

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