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Characiformes (Characins) >
Anostomidae (Headstanders) > Leporininae
Etymology: Insperanos: Name from Latin 'īnspērāns' for unexpected, alluding to the surprising discovery of an ancient
lineage of Anostomidae represented by I. nattereri, plus the four first letters of Anostomus referring to the type genus of the family, following the practice of previous authors who described genera in the Anostomidae (e.g. Pseudanos Winterbottom, 1980;
Petulanos Sidlauskas & Vari, 2008).
Eponymy: Dr Johann Natterer (1787–1843) was an Austrian naturalist and collector. [...] (Ref. 128868), visit book page.
More on author: Steindachner.
Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
; eau douce benthopélagique. Tropical
South America: throughout Orinoco and Amazon basins; Brazil and possibly Bolivia and Colombia.
Taille / Poids / Âge
Maturité: Lm ?  range ? - ? cm
Max length : 36.0 cm TL mâle / non sexé; (Ref. 126097); poids max. publié: 669.92 g (Ref. 126097)
Adults occur in rocky areas of the river with moderate to high current (Ref. 57460). Feed on sponges (Ref. 57460). Distinct pairs breed on densely grown weedy places (Ref. 205).
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Distinct pairs breed on densely grown weedy places (Ref. 205).
Sidlauskas, B.L., F.M. Assega, B.F. Melo, C. Oliveira and J.L.O. Birindelli, 2021. Total evidence phylogenetic analysis reveals polyphyly of Anostomoides and uncovers an unexpectedly ancient genus of Anostomidae fishes (Characiformes). Zool. J. Linn. Soc. 194(2):626-669. (Ref. 138033)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))
Menace pour l'homme
Harmless
Utilisations par l'homme
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Sources Internet
Estimations basées sur des modèles
Indice de diversité phylogénétique (Réf.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00437 (0.00168 - 0.01131), b=3.14 (2.92 - 3.36), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Niveau trophique (Réf.
69278): 2.3 ±0.1 se; based on size and trophs of closest relatives
Résilience (Réf.
120179): Milieu, temps minimum de doublement de population : 1,4 à 4,4 années (Preliminary K or Fecundity.).
Vulnérabilité de la pêche (Ref.
59153): Low to moderate vulnerability (26 of 100).
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