Myxines (hagfishes) >
Myxiniformes (Hagfishes) >
Myxinidae (Hagfishes) > Myxininae
Etymology: Myxine: Ancient Greek word for a slimy fish: myxa, slime; -inus, one who, referring to copious amounts of slime produced by M. glutinosa (See ETYFish); sotoi: In honor of Jules Marcelo Rosa Soto (b. 1970), Universidade do Vale do Itajai, for his work on the Brazilian marine fauna and for encouraging Mincarone to study hagfishes (See ETYFish).
Eponymy: Dr Jules Marcelo Rosa Soto (d: 1970) is a Brazilian ichthyologist and geographer who is Curator at Museu Oceanográfico do Vale do Itajaí, Universidade do Vale do Itajaí. [...] (Ref. 128868), visit book page.
Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
marin bathydémersal; non migrateur; profondeur 690 - 810 m (Ref. 40869). Deep-water
Southwest Atlantic: Brazil.
Taille / Poids / Âge
Maturité: Lm ? range ? - ? cm
Max length : 52.0 cm TL mâle / non sexé; (Ref. 40869)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Color of live specimens pinkish red with whitish head anterior to first slime pore; whitish middorsal stripe extending from caudal finfold to about over gill apertures. Six pairs of gill pouches; a 2-cusp multicusp on both anterior and posterior sets of cusps, total cusps 38-44. Pores: prebranchial 28-38; trunk 61-73; tail 11-13; total 101-119. Ventral finfold 4-6 mm high.
Body shape (shape guide): eel-like; Cross section: oval.
Of 30 specimens, 26 were females, 3 males, 1 hermaphrodite. Four females had large eggs about 20 x 6 mm, but none of the eggs with encapsulated anchor filaments. The species lives on the continental slope.
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Copulatory organ absent. The gonads of hagfishes are situated in the peritoneal cavity. The ovary is found in the anterior portion of the gonad, and the testis is found in the posterior part. The animal becomes female if the cranial part of the gonad develops or male if the caudal part undergoes differentiation. If none develops, then the animal becomes sterile. If both anterior and posterior parts develop, then the animal becomes a functional hermaphrodite. However, hermaphroditism being characterised as functional needs to be validated by more reproduction studies (Ref. 51361 ).
Mincarone, M.M., 2001. Myxine sotoi, a new species of hagfish (Agnatha, Myxinidae) from Brazil. Bull. Mar. Sci. 68(3):479-483. (Ref. 40869)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))
Menace pour l'homme
Harmless
Utilisations par l'homme
Outils
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Sources Internet
Estimations basées sur des modèles
Température préférée (Réf.
123201): 4.9 - 6.6, mean 5 °C (based on 5 cells).
Indice de diversité phylogénétique (Réf.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00115 (0.00045 - 0.00294), b=3.03 (2.81 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Niveau trophique (Réf.
69278): 3.4 ±0.6 se; based on size and trophs of closest relatives
Résilience (Réf.
120179): Faible, temps minimum de doublement de population : 4,5 à 14 années (Fec assumed to be <100).
Vulnérabilité de la pêche (Ref.
59153): Moderate vulnerability (41 of 100).
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