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Myxini (slijmprikken) (hagfishes) > Myxiniformes (Hagfishes) > Myxinidae (Hagfishes) > Eptatretinae
Etymology: Eptatretus: hepta (Gr.), seven; tretos (Gr.), perforated (i.e., with holes), referring to seven gill apertures on what would later be described as Homea banksii (=E. cirrhatus) [range within genus is 6-14 pairs of gill apertures] (See ETYFish); fernholmi: In honor of Bo Fernholm (b. 1941), Swedish Museum of Natural History, for his contributions to hagfish biology (See ETYFish).
Eponymy: Bo Fernholm (d: 1941) is a Swedish zoologist. [...] (Ref. 128868), visit book page.

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

marien bathydemersaal; standvastig; diepte 200 - 400 m (Ref. 31276). Deep-water

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Northwest Pacific: Taiwan.

Grootte / Gewicht / Leeftijd

Maturity: L_m ? range ? - ? cm
Max length : 29.5 cm TL mannelijk / geslacht onbekend; (Ref. 31276)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Six pairs of gill pouches and apertures, gill apertures usually crowded in a slightly curved line; the most posterior left gill aperture not confluent with the external opening of the pharyngocutaneous duct (PCD). Eye spots present but not obvious (Ref. 31545). Branchial length less than 3% of total length. Fused cusps 3/2, total cusps 42-50. Prebranchial slime pores 16=23, total pores 64-71. Ventral finfold poorly developed (Ref. 51420).

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

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 ).

Hoofdreferentie Upload your references | Referenties | Coördinator | Medewerkers

Fernholm, B., 1998. Hagfish systematics. p. 33-44. In J.M. Jørgensen, J.P. Lomholt, R.E. Weber and H. Malte (eds.) The biology of hagfishes. Chapman & Hall, London. 578 p. (Ref. 31276)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2024-2)

Kwetsbaar, zie IUCN Rode Lijst (VU) (B1ab(iii)); Date assessed: 13 November 2009

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

Harmless

Gebruik door de mens

Visserij: van geen belang

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Estimates based on models

Fylogenetische diversiteitsindex (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00204 (0.00094 - 0.00444), b=2.93 (2.74 - 3.12), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trofisch niveau (Ref. 69278): 4.0 ±0.7 se; based on size and trophs of closest relatives

Weerstandsvermogen (Ref. 120179): laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Fec assumed to be <100).

Fishing Vulnerability (Ref. 59153): Low vulnerability (20 of 100).

Eptatretus fernholmi (Kuo, Huang & Mok, 1994)