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Gymnotiformes (Knifefishes) >
Apteronotidae (Ghost knifefishes) > Apteronotinae
Etymology: Compsaraia: Greek, kompsos, -e, -on = elegance, polish, gracefulness + see under Raja; samueli: Patronym in honour of Dr Samuel Albert, who
provided the authors with specimens of the type series.
Eponymy: Dr Samuel Albert is the senior author’s father. [...] (Ref. 128868), visit book page.
Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied
Ecologie
; zoet water pelagisch. Tropical; 3°S - 4°S, 61°W - 62°W
South America: Brazil. Known from the western Amazon River basin of Peru and Brazil. Collection localities are in the Rio Amazonas, near Iquitos, Peru, the Rio Solimões below the confluence of the Rio Purus, Brazil, and the lower Rio Iça of Brazil.
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ?  range ? - ? cm
Max length : 22.6 cm SL mannelijk / geslacht onbekend; (Ref. 80384)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Compsaraia samueli differs unambiguously
from C. compsa by the presence of the following character states:more caudal-fin rays (17–18 [mode 18] vs. 13–16 [mode 14]); a shorter caudal peduncle (CP/LEA = 9% [0–23%] vs. 34% [18–46%]); a less tapering body shape in lateral profile, in which the ratio of body depth measurements at the anal fin and dorsal organ origins is greater (93% [80–116%] vs. 75% [67–82%]); and a smaller body size (minimum
size at sexual maturity 144 mm [vs. 165 mm], maximum total length of 230 mm [vs. 305 mm]). Compsaraia samueli may be further distinguished from C. compsa by secondary sexual dimorphisms in several features of snout and jaw morphology (Ref. 80384).
Body shape (shape guide): elongated; Cross section: compressed.
Electric organ discharge known from two sexually mature
females and three sexually mature males. The two female specimens exhibited a lower Fo (1.242–1.243 kHz) than the three male specimens (1.337, 1.387 and 1.396 kHz) (Ref. 80384).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Albert, J.S. and W.G.R. Crampton, 2009. A new species of electric knifefish, genus Compsaraia (Gymnotiformes: Apteronotidae) from the Amazon River, with extreme sexual dimorphism in snout and jaw length. Systematics and Biodiversity 7(1):81-92. (Ref. 80384)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))
Gevaar voor de mens
Harmless
Gebruik door de mens
Tools
Speciale rapporten
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Internetbronnen
Schattingen op basis van modellen
Fylogenetische diversiteitsindex (Ref. 82804) |
PD50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00347 (0.00141 - 0.00851), b=3.06 (2.85 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Trofisch niveau (Ref. 69278) |
3.3 ±0.3 se; based on size and trophs of closest relatives |
Kwetsbaarheid van de visserij (Ref. 59153) |
Low vulnerability (18 of 100). 🛈 |