Elasmobranchi (squali e razze) (sharks and rays)
(Sleeper and dogfish sharks) > Somniosidae
Etymology: Scymnodon: Greek, skymnos, -ou = little lion + Greek, odous = teeth (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
; marino batipelagico; distribuzione batimetrica 200 - 1600 m (Ref. 247), usually 550 - 1450 m (Ref. 10717). Deep-water; 61°N - 54°S, 18°W - 172°W
Eastern Atlantic: along the slope from Scotland to Spain, Portugal, Senegal. Southwest Pacific: New Zealand (Ref. 26346).
Size / Peso / Age
Maturity: Lm ?  range ? - ? cm
Max length : 110 cm TL maschio/sesso non determinato; (Ref. 247)
Spine anali 0; Raggi anali molli: 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).
Life cycle and mating behavior
Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve
Probably ovoviviparous (Ref. 247). Distinct pairing with embrace (Ref. 205).
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)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Pesca: scarso interesse commerciale
BibliografiaAcquacolturaProfilo di acquacolturaVarietàGeneticaFrequenze allelicheEreditarietàMalattieElaborazioneMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 4.2 - 11.4, mean 7.7 °C (based on 164 cells).
Phylogenetic diversity index (Ref. 82805
= 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00490 (0.00210 - 0.01144), b=3.13 (2.93 - 3.33), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic level (Ref. 69278
): 3.9 ±0.7 se; based on diet studies.
Resilienza (Ref. 120179
): Basso, tempo minimo di raddoppiamento della popolazione 4.5 - 14 anni (Fec assumed to be <100).
Vulnerability (Ref. 59153
): High vulnerability (58 of 100) .