Mixines (mixinos) (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); mcconnaugheyi: In honor of Ronald R. McConnaughey, marine technician and diver, Scripps Institution of Oceanography, who helped develop gear used to capture type (See ETYFish).
Eponymy: Ronald R McConnaughey is a marine technician and diver. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ecología
marino demersal; no migratorio; rango de profundidad 43 - 415 m (Ref. 31276). Deep-water
Eastern Central Pacific: off southern California and in lower Gulf of California.
Tamaño / Peso / Age
Maturity: Lm ? range ? - ? cm
Max length : 48.2 cm TL macho / no sexado; (Ref. 96339)
TBK: demerspelag.
Life cycle and mating behavior
Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
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 ).
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)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
Pesquerías: sin interés
Herramientas
Special reports
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Fuentes de Internet
Estimates based on models
Preferred temperature (Ref.
123201): 8.8 - 15.8, mean 12.7 °C (based on 32 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 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).
Nivel trófico (Ref.
69278): 4.1 ±0.7 se; based on size and trophs of closest relatives
Resiliencia (Ref.
120179): Bajo, población duplicada en un tiempo mínimo de 4.5-14 años (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (38 of 100).
