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Teleostei (teleosts) > Gymnotiformes (Knifefishes) > Apteronotidae (Ghost knifefishes) > Apteronotinae
Etymology: Megadontognathus: Greek, megas, megalos = great + Greek, odous = teeth + Greek, gnathos = jaw (Ref. 45335).

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

Freshwater; benthopelagic. Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South America: Known only from the Cuyuni Basin and the Rio Caroní in Venezuela.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 23.8 cm TL male/unsexed; (Ref. 26457)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 0; Anal soft rays: 159 - 169; Vertebrae: 90. Considered unique among apteronotids by its dentition: 2-3 large conical teeth on the posterior end of dentary; 2-3 minute, conical teeth on each premaxillary.

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Main reference Upload your references | References | Coordinator : Albert, James S. | Collaborators

Mago-Leccia, F., 1994. Electric fishes of the continental waters of America. Fundacion para el Desarrollo de las Ciencias Fisicas, Matematicas y Naturales (FUDECI), Biblioteca de la Academia de Ciencias Fisicas. Matematicas y Naturales, Caracas, Venezuela. vol. 29 . 206 p. (Ref. 26457)

IUCN Red List Status (Ref. 130435)

Critically Endangered (CR) (B2ab(iii)); Date assessed: 02 October 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

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Ecology
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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00355 (0.00145 - 0.00871), b=3.06 (2.85 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.3 ±0.3 se; based on size and trophs of closest relatives

Fishing Vulnerability (Ref. 59153): Low vulnerability (14 of 100).

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Megadontognathus cuyuniensis Mago-Leccia, 1994