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Scymnodon ringens Barbosa, du, Bocage, de, Brito & Capello, 1864

Knifetooth dogfish
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Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Scymnodon ringens   AquaMaps   Data sources: GBIF OBIS
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Image of Scymnodon ringens (Knifetooth dogfish)
Scymnodon ringens
Picture by Serrano, A.


Kermadec Islands country information

Common names: [No common name]
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Also Ref. 89942.
National Checklist:
Country Information:
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Duffy, C.A.J. and S.T. Ahyong, 2015
National Database:

Common names from other countries

Classificação / Names Nomes comuns | Sinônimos | Catalog of Fishes(Gênero, Espécies) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (tubarões e raias) (sharks and rays) > Squaliformes (Sleeper and dogfish sharks) > Somniosidae (Sleeper sharks)
Etymology: Scymnodon: scymnus, an ancient name for some kind of shark, derived from a Greek word meaning young animal, cub or whelp; odon (Gr.), tooth, referring to large, triangular cutting teeth on lower jaw of S. ringens. (See ETYFish);  ringens: Latin for gaping, referring to its large, open mouth (“ore amplo, hiante”). (See ETYFish).

Environment: milieu / climate zone / depth range / distribution range Ecologia

marinhas batipelágico; intervalo de profundidade 200 - 1600 m (Ref. 247), usually 550 - 1450 m (Ref. 10717).   Deep-water; 61°N - 54°S, 18°W - 172°W

Distribuição Países | Áreas da FAO | Ecossistemas | Ocorrências | Point map | Introduções | Faunafri

Eastern Atlantic: along the slope from Scotland to Spain, Portugal, Senegal. Southwest Pacific: New Zealand (Ref. 26346).

Tamanho / Peso / Idade

Maturity: Lm ?  range ? - ? cm
Max length : 110 cm TL macho/indeterminado; (Ref. 247)

Descrição suscinta Chaves de identificação | Morfologia | Morfometria

Espinhos anais: 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).

Biologia     Glossário (p.ex. epibenthic)

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).

Ciclo de vida ou comportamento de acasalamento Maturities | Reprodução | Spawnings | Egg(s) | Fecundities | Larvas

Probably ovoviviparous (Ref. 247). Distinct pairing with embrace (Ref. 205).

Referência principal Upload your references | Referências | Coordenador | Colaboradores

Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)

Status na Lista Vermelha da UICN (Ref. 130435)

  Vulnerável, ver Livro Vermelho da UICN (VU) (A2bd); Date assessed: 21 November 2019

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Ameaça para os humanos

  Traumatogenic




Uso pelos humanos

Pescarias: pouco comercial
FAO(pescarias: produção; publication : search) | FishSource | Sea Around Us

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Trophic ecology
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Ecology
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Estimates based on models

Preferred temperature (Ref. 115969): 4.2 - 11.4, mean 7.7 (based on 164 cells).
Índice de diversidade filogenética (Ref. 82804):  PD50 = 0.7500   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00178 - 0.00849), b=3.13 (2.94 - 3.32), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Nível Trófico (Ref. 69278):  3.9   ±0.7 se; based on diet studies.
Resiliência (Ref. 120179):  Baixo, tempo mínimo de duplicação da população 4,5 - 14 anos (Fec assumed to be <100).
Fishing Vulnerability (Ref. 59153):  High to very high vulnerability (66 of 100).
Climate Vulnerability (Ref. 125649):  Moderate to high vulnerability (46 of 100).
Categoria de preço (Ref. 80766):   Unknown.