Eptatretus grouseri McMillan, 1999

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Eptatretus grouseri   AquaMaps   Data sources: GBIF OBIS
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Eptatretus grouseri
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drawing shows typical fish in this Family.

Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Myxini (slijmprikken) (hagfishes) > Myxiniformes (Hagfishes) > Myxinidae (Hagfishes) > Eptatretinae
Etymology: Eptatretus: Greek, epta = seven + Greek, tretos, -e, -on = with holes (Ref. 45335);  grouseri: Named for David 'Grouser' McMillan, Chief Engineer in the U.S. Merchant Marine, for his continued encouragement of C.B. McMillan's hagfish studies and for his knowledge and love of ships and the seas (Ref. 31788).

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

; marien bathydemersaal; standvastig; diepteverspreiding ? - 722 m (Ref. 31788).   Deep-water

Verspreiding Landen | FAO regio's | Ecosystems | Voorkomen | Point map | Introducties | Faunafri

Southeast Pacific: known only from the Galapagos Islands.

Size / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 37.8 cm TL mannelijk/geslacht niet bekend; (Ref. 31788)

Korte beschrijving Morfologie | Morfometrie

Five or six gill pouches and apertures each side, last gill aperture confluent with the pharyngocutaneous duct on the left side. Multicusps 3 in anterior and 2 in posterior rows, 9 unicusps in each anterior and 8 in each posterior row, total cusps 44; slime pore counts: prebranchial 12-13, branchial 4-5, trunk 44-46, tail 14-15, total slime pores 76-77. Ventral finfold vestigial; caudal finfold well developed (Ref. 31788).

Biologie     Verklarende woordenlijst (b.v. epibenthic)

Life cycle and mating behavior Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | 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 ).

Voornaamste referentie Upload your references | Referenties | Coördinator | Medewerkers

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

Status op de Rode Lijst van het IUCN (Ref. 120744)

  Niet bedreigd (LC) ; Date assessed: 10 November 2009

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Harmless





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Estimates based on models

Preferred temperature (Ref. 115969): 6.9 - 11.2, mean 9.5 (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 (0.00094 - 0.00446), b=2.92 (2.72 - 3.12), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  4.2   ±0.5 se; Based on size and trophs of closest relatives
Weerstandsvermogen (Ref. 120179):  laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Fec assumed to be <100).
Kwetsbaarheid (Ref. 59153):  Low to moderate vulnerability (30 of 100) .