Eptatretus mccoskeri

Eptatretus mccoskeri McMillan, 1999

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Eptatretus mccoskeri   AquaMaps   Data sources: GBIF OBIS
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Classification / Names Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa

Myxini (pirålar) (hagfishes) > Myxiniformes (Hagfishes) > Myxinidae (Hagfishes) > Eptatretinae
Etymology: Eptatretus: Greek, epta = seven + Greek, tretos, -e, -on = with holes (Ref. 45335);  mccoskeri: Named for John E. McCosker, Senior Scientist, California Academy of Sciences, for providing this new study material, as well for his important contributions to marine biology (Ref. 31788).

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

; marina djupbottenlevande; ej vandrande; djupintervall ? - 215 m (Ref. 31788).   Deep-water

Utbredning Länder | FAO områden | Ekosystem | Förekomster | Point map | Utplanteringar | Faunafri

Southeast Pacific: known only from the Galapagos Islands.

Size / Vikt / Age

Maturity: Lm ?  range ? - ? cm
Max length : 32.0 cm TL hane/ej könsbestämd; (Ref. 31788)

Short description Morfologi | Morfometri

Eight gill pouches and apertures each side, last gill aperture confluent with the pharyngocutaneous duct on the left side; 12 multicusps (3 fused cusps in each row), unicusps 36-39 (9,9 to 10,10 unicusps in each anterior and 9,9 to 9,10 in each posterior row), total cusps 48-51; total slime pores 72-74, prebranchial 14-15, branchial 7, trunk 40-42, tail 10-12. Ventral finfold absent or vestigial; caudal finfold with white margin; head slightly lighter than body color, face dark except for small white area around mouth; barbels all white (Ref. 31788).

Biologi     Ordlista (t.ex. epibenthic)

Life cycle and mating behavior Könsmognad | Reproduktion | Lek | Ägg | Fecundity | Larver

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 ).

Main reference Upload your references | referenser | Koordinator | Medarbetare

McMillan, C.B., 1999. Three new species of hagfish (Myxinidae, Eptatretus) from the Galápagos Islands. Fish. Bull. 97:110-117. (Ref. 31788)

IUCN Red List Status (Ref. 123251)

  Least Concern (LC) ; Date assessed: 10 November 2009

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

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Estimates based on models

Preferred temperature (Ref. 115969): 8.2 - 14.7, mean 9.6 °C (based on 7 cells).
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).
Trofisk nivå (Ref. 69278):  4.1   ±0.5 se; based on size and trophs of closest relatives
Resiliens (Ref. 120179):  Låg, lägsta populationsfördubblingstid 4,5-14 år (Fec assumed to be <100).
Vulnerability (Ref. 59153):  Low vulnerability (23 of 100) .