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); bobwisneri: Replacement name of E. wisneri McMillan 1999, which became a junior homonym of Paramyxine wisneri Kuo, Huang & Mok 1994 when Paramyxine was subsumed into Eptatretus; the name continues to honor Robert (“Bob”) L. Wisner (1921-2005), McMillan’s colleague at Scripps Institution of Oceanography, for “invaluable” assistance with her hagfish research and other contributions to ichthyology (See ETYFish).
Eponymy: Robert ‘Bob’ Lester Wisner (1912–2005) was honoured for his “…valuable assistance with C.B. McMillan’s myxinid research as well as his other contributions to ichthyology.” (See Wisner, also see Fern) (Ref. 128868), visit book page.
Entorno: milieu / zona climática / rango de profundidad / gama de distribución
Ecología
marino batidemersal; no migratorio; rango de profundidad 512 - 577 m (Ref. 123790). Deep-water
Southeast Pacific: known only from the Galapagos Islands (Ref. 31788).
Tamaño / Peso / Edad
Madurez: Lm ?  range ? - ? cm
Max length : 32.8 cm TL macho / no sexado; (Ref. 31788); 35.6 cm TL (female)
Descripción breve
Claves de identificación | Morfología | Morfometría
This species is distinguished from its congeners except E. gomoni, E. luzonicus, E. octatrema, E. okinoseanus by the following characters: eight pairs of gill apertures that are well-spaced and arranged in an almost straight line; teeth 3/2 multicusps pattern; total cusps 44-47 (vs. 50 in E. gomoni, 38-40 in E. octatrema); prebranchial pores 9-11 (vs. 12-13 in E. gomoni, 22-26 in E. octatrema, 13-17 in E. okinoseanus); trunk pores 43-47 (vs. 57-58 in E. gomoni, 63-68 in E. octatrema, 54-61 in E. okinoseanus); total pores 73-76 (vs. 91-93 in E. gomoni, 77-82 in E. indrambaryai, 84-88 in E. luzonicus, 104-117 in E. octatrema, 87-97 in
E. okinoseanus); nasal-sinus papillae absent (vs. one single nasal-sinus papilla in E. luzonicus, two bilaterally symmetrical nasal-sinus papillae in E. octatrema) (Ref. 123790).
Body shape (shape guide): eel-like; Cross section: oval.
Ciclo vital y comportamiento de apareamiento
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 ).
McMillan, C.B., 1999. Three new species of hagfish (Myxinidae, Eptatretus) from the Galápagos Islands. Fish. Bull. 97:110-117. (Ref. 31788)
Situación en la Lista Roja de la UICN (Ref. 130435: Version 2025-2 (Global))
Amenaza para el ser humano
Harmless
Usos humanos
Pesquerías: sin interés
Herramientas
Informes especiales
Descargar XML
Fuentes de Internet
Estimaciones basadas en modelos
Índice de diversidad filogenética (Referencia 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00204 (0.00095 - 0.00440), 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 (Referencia 69278) |
4.0 ±0.7 se; based on size and trophs of closest relatives |
Resiliencia (Referencia 120179) |
Bajo, población duplicada en un tiempo mínimo de 4.5-14 años (Fec assumed to be <100). |
Vulnerabilidad pesquera (Ref. 59153) |
Low to moderate vulnerability (32 of 100). 🛈 |