Eptatretus ancon

Eptatretus ancon (Mok, Saavedra-Diaz & Acero P., 2001)

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Klassifizierung / Names Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa

Myxini (Kieferlose) (hagfishes) > Myxiniformes (Hagfishes) > Myxinidae (Hagfishes) > Eptatretinae
Etymology: Eptatretus: Greek, epta = seven + Greek, tretos, -e, -on = with holes (Ref. 45335);  ancon: Named for the research vessel B/I ANCON of INVEMAR, from which the holotype was captured.

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

; seewasser bathydemersal; standorttreu; tiefenbereich ? - 488 m (Ref. 41105).   Deep-water

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Western Central Atlantic: off La Punta de los Remedios, Caribbean Sea.

Size / Gewicht / Alter

Maturity: Lm ?  range ? - ? cm
Max length : 22.0 cm TL Männchen/unbestimmt; (Ref. 41105)

Kurzbeschreibung Morphologie | Morphometrie

External aperture of its last efferent gill duct and pharyngocutaneous duct separated. Gill apertures nonlinear and crowded. Lengths of efferent gill ducts unequal with anterior ones much longer with length of first about 3 times that of last. Gill apertures 6. Slime pores: prebranchial 26; branchial 0; trunk 45; tail 9; total 80. Caudal and ventral finfold not well developed. Head, body, tail and finfold uniformly light brown in alcohol; eyespots faint, gill aperture margins not pale. Ventral aorta bifurcated between the fourth and fifth gill pouches (Ref. 41105).

Biologie     Fachlexikon (Englisch) (z.B. epibenthic)

Iteroparous (Ref. 94918).

Life cycle and mating behavior Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

Iteroparous (Ref. 94918). 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 ).

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Mok, H.-K., L.M. Saavedra-Diaz and A.P. Acero, 2001. Two new species of Eptatretus and Quadratus (Myxinidae, Myxiniformes) from the Caribbean Coast of Colombia. Copeia 2001(4):1026-1033. (Ref. 41105)

IUCN Rote Liste Status (Ref. 123251)

  Daten mangelhaft (DD) ; Date assessed: 11 November 2009

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00204 (0.00095 - 0.00438), b=2.93 (2.73 - 3.13), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  4.0   ±0.5 se; based on size and trophs of closest relatives
Widerstandsfähigkeit (Ref. 120179):  niedrig, Verdopplung der Population dauert 4,5 - 14 Jahre. (Fec assumed to be <100).
Verwundbarkeit (Ref. 59153):  Low vulnerability (11 of 100) .