Eptatretus astrolabium

Eptatretus astrolabium Fernholm & Mincarone, 2010

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drawing shows typical species in Myxinidae.

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Myxini (slijmprikken) (hagfishes) > Myxiniformes (Hagfishes) > Myxinidae (Hagfishes) > Eptatretinae
Etymology: Eptatretus: Greek, epta = seven + Greek, tretos, -e, -on = with holes (Ref. 45335);  astrolabium: Named after its type locality, Astrolabe Bay, which was named in 1827 by Jules Sébastien César Dumont d’Urville after his vessel L’Astrolabe; noun in apposition.

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

; marien benthopelagisch; diepteverspreiding ? - 500 m (Ref. 85154).   Deep-water

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

Western Pacific: Papua New Guinea.

Size / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 40.0 cm TL (female)

Korte beschrijving Morfologie | Morfometrie

This species differs from all its congeners except five Pacific species (Eptatretus carlhubbsi, Eptatretus cirrhatus, Eptatretus goliath, Eptatretus laurahubbsae, Eptatretus strahani) and two Atlantic Ocean species (Eptatretus caribbeaus, Eptatretus menezesi) by having 7 pairs of gill pouches and three-cusp multicusps on the anterior and posterior rows of cusps. It further differs from these congeners by having the following characters: 10 posterior unicusps (vs. 11-13 in E. carlhubbsi, 7-9 in E. cirrhatus, 11-16 in E. laurahubbsae); 52 total cusps (vs. 54-58 in E. caribbeaus, 61-71 in E. carlhubbsi, 61-68 in E. laurahubbsae); 18-19 prebranchial pores (vs. 13-15 in E. caribbeaus, 12-17 in E. carlhubbsi, 14-15 in E. goliath, 14-17 in E. laurahubbsae, 13-17 in E. menezesi, 13-16 in E. strahani); 5 branchial pores (vs. 6-7 or 6-8 for remaining seven-gilled species); 48-49 trunk pores (vs. 60-70 in E. carlhubbsi, 57-58 in E. goliath, 60-67 in E. laurahubbsae); 83-84 total pores (vs. 93-110 in E. carlhubbsi, 92 in E. goliath, 97-105 in E. laurahubbsae, 86-94 in E. menezesi). In addition, these congeners, except E. caribbeaus, have two bilaterally symmetrical nasal-sinus papillae in the dorsal surface of the nasal sinus, while it is absent in E. astrolabium (Ref. 85154).

Biologie     Verklarende woordenlijst (b.v. epibenthic)

The observation re the 'silty mud bottom’ were the specimen was taken, was inferred from sediment in traps retrieved. The female holotype with several small, rounded eggs, ca. 2 mm diameter; all eggs in the mesentery, which is attached to the body wall (Ref. 85154). Iteroparous (Ref. 94918).

Life cycle and mating behavior Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven

Iteroparous (Ref. 94918).

Voornaamste referentie Upload your references | Referenties | Coördinator | Medewerkers

Fernholm, B. and M.M. Mincarone, 2010. A new species of hagfish (Myxinidae: Eptatretus) from Papua New Guinea. J. Fish Biol. 77(4):998-1005. (Ref. 85154)

Status op de Rode Lijst van het IUCN (Ref. 123251)

  Onvoldoende gegevens (DD) ; Date assessed: 20 December 2010

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Harmless





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Estimates based on models

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).
Trophic level (Ref. 69278):  4.2   ±0.5 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref. 120179):  .
Kwetsbaarheid (Ref. 59153):  Low to moderate vulnerability (30 of 100) .