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> Gymnotiformes (Knifefishes) > Sternopygidae (Glass knifefishes)
Etymology: Archolaemus: Greek, archo = anus + Greek, laimos = throat (Ref. 45335); orientalis: From the Latin for ‘of the east’ refers to the presence of the species in the Rio São Francisco, the easternmost known occurrence of a species of Archolaemus ..

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

; süßwasser benthopelagisch. Tropical

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South America: upper Rio São Francisco basin, Brazil.

Size / Gewicht / Alter

Maturity: L_m ? range ? - ? cm

Kurzbeschreibung Morphologie | Morphometrie

Afterflossenweichstrahlen: 164 - 186. Distinguished from all species of the Archolaemus by the absence of a narrow dark stripe along the lateral line and absence of a broad band of dusky to dark pigmentation overlying the basal pterygiophores of the anal fin (versus the presence of such dark pigmentation). Differs further from other congeners by having the following combination of characters: gape short, the rictus falling short of the vertical through the posterior border of the posterior nares; 16 pectoral-fin rays; 164-186 anal-fin rays; anteroposterior length of premaxilla equal to the transverse width; length of the posterior ceratohyal approximately the same length as the ventral hypohyal; length of the coronomeckelian bone less than 20% the length of Meckel’s cartilage; teeth on the dentary restricted to the anterior one-half or slightly more of the dorsal margin of the dentary (Ref. 93148).

Inhabits portion of a river characterized by large rapids, a major waterfall and rocky and sandy substrates (Ref. 93148).

Life cycle and mating behavior Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

Hauptreferenz Upload your references | Referenzen | Koordinator : Albert, James S. | Partner

Vari, R.P., C.D. de Santana and W.B. Wosiacki, 2012. South American electric knifefishes of the genus Archolaemus (Ostariophysi, Gymnotiformes): undetected diversity in a clade of rheophiles. Zoological Journal of the Linnaean Society 165:670-699. (Ref. 93148)

IUCN Rote Liste Status (Ref. 130435)

Daten mangelhaft (DD) ; Date assessed: 07 November 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

Harmless

Nutzung durch Menschen

Fischereien:

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00363 (0.00172 - 0.00768), b=2.97 (2.78 - 3.16), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.2 ±0.4 se; based on size and trophs of closest relatives

Fishing Vulnerability (Ref. 59153): Low to moderate vulnerability (28 of 100).

Archolaemus orientalis Stewart, Vari, de Santana & Wosiacki, 2012