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> Saccopharyngiformes (Swallowers and gulpers) > Monognathidae (Onejaws)
Etymology: Monognathus: Greek, monos = one + Greek, gnathos = jaw (Ref. 45335); smithi: Named for Kenneth Smith, chief scientist for the cruise during which the material was caught..
More on authors: Bertelsen & Nielsen.

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

marina batypelagisk; djupintervall 4201 - 5800 m (Ref. 34506). Deep-water

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North Pacific: Central North Pacific gyre, approximately 31°N, 159'W.

Size / Vikt / Age

Maturity: L_m ? range ? - ? cm
Max length : 7.2 cm TL hane/ej könsbestämd; (Ref. 34506)

Short description Morfologi | Morfometri

Mjukstrålar i ryggfenan (totalt): 75-102; Mjukstrålar i analfenan: 55 - 63. The available specimens of M. smithi differ from all other specimens of a similar total length (6.8-7.2) within the genus by the long skull 7.0-7.6% TL and long lower jaw 11.8-12.5% TL. Furthermore, it is distinguished by the following combination of characters: head long with elongate, pointed snout slightly upturned, rostral fang strongly hooked with distal part in a nearly right angle to dorsal profile of skull, preanal 36.0-37.5% TL, and at least 7 teeth in jaw (Ref. 34506).

The holotypes and paratypes of M. smithi were caught in the water column in a closing net at 4200 and 5200 m, with a sounding at 5800 m (Ref. 34506).

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

Main reference Upload your references | referenser | Koordinator | Medarbetare

Bertelsen, E. and J.G. Nielsen, 1987. The deep sea eel family Monognathidae (Pisces, Anguilliformes). Steenstrupia, 13(4):141-198. (Ref. 34506)

IUCN Red List Status (Ref. 130435)

Data deficient (DD) ; Date assessed: 13 August 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00102 (0.00046 - 0.00225), b=3.06 (2.88 - 3.24), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).

Trofisk nivå (Ref. 69278): 3.3 ±0.5 se; based on size and trophs of closest relatives

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Monognathus smithi Bertelsen & Nielsen, 1987