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Characiformes (Characins) >
Stevardiidae (Stevardiids) > Creagrutinae
Etymology: Creagrutus: Greek, kreagreytos, -os, -on = to tear, to rip up the flesh (Ref. 45335); cerritulus: From the Latin cerritulus, meaning strange, in reference to the intense modifications of representatives of this species relative both to the other species of Creagrutus and across the Stevardiinae and even the Characidae.
Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
; eau douce benthopélagique. Tropical; 8°C - ? (Ref. 116020)
South America: Río Cachiyacu, a tributary of the Río Huallaga, Amazon basin in Peru.
Taille / Poids / Âge
Maturité: Lm ?  range ? - ? cm
Max length : 5.1 cm SL mâle / non sexé; (Ref. 116020)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Rayons mous dorsaux (Total) : 10; Rayons mous anaux: 13 - 15; Vertèbres: 36 - 37. Creagrutus cerritulus can be easily distinguished from all congeners by the following unique characters: mouth distinctly ventrally positioned; dentary and premaxilla dentition strongly spatulate with the central and adjacent cusps of similar size; anterior portion of the dentary strongly bent forming a nearly 120° angle relative to the posterior portion of the lower jaw and resulting in the cutting edges of the dentary teeth running parallel to the distal axis of the jaw; symphyseal interdigitations present on the lingual surface between the contralateral premaxillae; a notch along the posterior margin of the maxilla present which serves for the insertion of the ligamentum primordiale; distal tips of the mesethmoid wings anteriorly bent; very tight association between the posterior, cuneiform process of the vomer and the anterior portion of the parasphenoid; intestine distinctly elongated; size of stomach reduced; and swimbladder reduced, especially the posterior chamber (Ref. 116020).
Body shape (shape guide): fusiform / normal.
Inhabits river characterized by moderate to strong currents over a substrate composed primarily of pebbles and rocks. The water was reddish in color, alkaline, with high conductivity (10000 μS/cm) and 'very salty' water. Collected along with only six other fish species.
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Netto-Ferreira, A.L. and R.P. Vari, 2017. A new highly modified species of Creagrutus (Characidae: Stevardiinae) apparently mimetic of Prodontocharax. Copeia 105(2):368-374. (Ref. 116020)
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): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01549 (0.00645 - 0.03717), b=3.00 (2.79 - 3.21), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Niveau trophique (Réf.
69278): 2.5 ±0.1 se; based on size and trophs of closest relatives
Vulnérabilité de la pêche (Ref.
59153): Low vulnerability (10 of 100).
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