Classification / Names
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Characiformes (Characins) >
Crenuchidae (South American darters) > Characidiinae
Etymology: Characidium: Diminutive of Charax, -akos = a fish without identification (Ref. 45335).
More on author: Peters.
Environment: milieu / climate zone / depth range / distribution range
Écologie
; eau douce benthopélagique. Tropical
South America: Brazil, near Rio de Janeiro (type locality).
Taille / Poids / Âge
Maturity: Lm ?  range ? - ? cm
Max length : 6.1 cm SL mâle / non sexé; (Ref. 38397)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Épines dorsales (Total) : 2; Rayons mous dorsaux (Total) : 9; Épines anales: 2; Rayons mous anaux: 6; Vertèbres: 36. Flat, scale-less breast, developed pectorals, slightly oblique eyes, only seen from above, and narrow interorbital; 3 unbranched pectoral rays and 1 unbranched pelvic ray; lateral line complete, adipose fin present, cheeks not covered, mouth with few, unicuspid teeth, numbering only 4 on the upper jaw. A rather broad, brown lateral stripe from snout to end of peduncle just above lateral line. 'Spines' are unbranched rays.
A small, bottom living species. Not collected since more than 100 years, and thus it may well be endangered, if not extinct (Ref. 38397).
Life cycle and mating behavior
Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larves
Géry, J., A. Zarske and H.J. Paepke, 2001. Supplementary description of two overlooked fish taxa, Leporinus macrolepidotus Peters, 1868, and Nanognathus borellii Boulenger, 1895, actually members of the genus Characidium Reinhardt, 1866 (Teleostei: Characiformes: Characidiidae. Zool. Abh. Mus. Tierkde. Dresden 51(3):23-31. (Ref. 38397)
Statut dans la liste rouge de l'IUCN (Ref. 130435)
Menace pour l'homme
Harmless
Utilisations par l'homme
Pêcheries: sans intérêt
Outils
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Sources Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Niveau trophique (Ref.
69278): 3.5 ±0.3 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).