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Gymnotiformes (Knifefishes) >
Apteronotidae (Ghost knifefishes) > Apteronotinae
Etymology: Sternarchorhynchus: Greek, sternon = sternon, + Greek, archos = anus + Greek, rhyngchos = snout (Ref. 45335); gnomus: From the Latin gnomus, meaning dwarf, in allusion to its small body size.
Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
; eau douce benthopélagique; pH range: 6.6 - 7.6. Tropical; 28°C - ? (Ref. 56955)
South America: Lower Río Caroni, Venezuela.
Taille / Poids / Âge
Maturité: Lm ?  range ? - ? cm
Max length : 15.2 cm TL mâle / non sexé; (Ref. 84053); 13.4 cm TL (female)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Rayons mous anaux: 159 - 177. Distinguished from all congeners by the following combination of characters: snout strongly curved; head and mid-dorsum as dark as dorsolateral areas; anal and pectoral fins translucent, without conspicuous distal dark margins; scales present along anterodorsal region of body; 6-7 scales above lateral line at mid-body; 159-177 total anal-fin rays; five branchiostegal rays; greatest body depth 9.3-11.4% of length to end of anal fin; snout to anus 58.4-77.6% of length to end of anal fin; pre-pectoral fin length 34.8-41.0% of HL; snout length 57.6-65.4% of HL; head depth at nape 39.7-44.9% of HL; postocular distance 36.9-41.6% of HL; eye diameter 4.1-7.6% of HL; internarial distance 2.7-7.0% of HL; branchial opening 9.5-12.3% of HL; tail length 10.1-17.4% of length to end of anal fin; tail depth 8.3-13.8% of caudal length (Ref. 56955).
Body shape (shape guide): elongated.
Inhabits channel with clear water (Ref. 56955); visibility of approximately 2 m and the pH ranging from 6.6-7.6 (Ref. 84053). Feeds on insects such as chironomids, ephemeropterans and trichopterans (Ref. 56955).
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
de Santana, C. D. and R.P. Vari, 2010. Electric fishes of the genus Sternarchorhynchus (Teleostei, Ostariophysi, Gymnotiformes); phylogenetic and revisionary studies. Zool. J. Linn. Soc. 159:223-371. (Ref. 84053)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))
Menace pour l'homme
Harmless
Utilisations par l'homme
Outils
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Sources Internet
Estimations basées sur des modèles
Indice de diversité phylogénétique (Réf. 82804) |
PD50 = 0.5000 [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). |
Niveau trophique (Réf. 69278) |
3.2 ±0.3 se; based on size and trophs of closest relatives |
Vulnérabilité de la pêche (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |