Classification / Names
Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa
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Characiformes (Characins) >
Characidae (Characins; tetras) > Characinae
Etymology: Acestrocephalus: Greek, agkistron = hook + Greek, kepahle = head (Ref. 45335); acutus: From the Latin adjective acutus, meaning sharp, in reference to the pointed nature of the snout of this species.
Environment: milieu / climate zone / depth range / distribution range
Ekologi
; sötvatten bentopelagisk. Tropical
South America: Rio Tocantins and rio Tapajós drainages in Brazil.
Size / Vikt / Age
Maturity: Lm ? range ? - ? cm
Max length : 10.4 cm SL hane/ej könsbestämd; (Ref. 75890)
Short description
Bestämningsnycklar | Morfologi | Morfometri
Mjukstrålar i ryggfenan (totalt) : 11; Mjukstrålar i analfenan: 33 - 39; Ryggkotor: 37 - 39. Among the species of Acestrocephalus with dark humeral blotch absent, this species can be separated from Acestrocephalus sardina and Acestrocephalus nigrifasciatus by possessing a smaller eye (28.0- 31.7 vs. 32.6-36.5 in Acestrocephalus nigrifasciatus and 31.3-37.4 in Acestrocephalus sardina); and an oblong dark blotch at caudal base instead of the triangular dark blotch present on the caudal base of those two species. Distinguished from Acestrocephalus pallidus by having an oblong dark blotch at caudal base (vs. absence of dark blotch); and differs further from Acestrocephalus pallidus by the shape of the muscular hiatus of the pseudotympanum and the muscular arrangement around it. Can be diagnosed from Acestrocephalus anomalus by having more teeth in the posterior row on dentary (28-36 vs. 23-28) and fewer teeth in the external tooth row on premaxilla (6-8 vs. 8-11) (Ref. 75890).
Life cycle and mating behavior
Könsmognad | Reproduktion | Lek | Ägg | Fecundity | Larver
Menezes, N.A., 2006. Description of five new species of Acestrocephalus Eigenmann and redescription of A. sardina and A. boehlkei (Characiformes: Characidae). Neotrop. Ichthyol. 4(4):385-400. (Ref. 75890)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Harmless
Human uses
Verktyg
Special reports
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00442 - 0.02263), b=3.09 (2.89 - 3.29), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisk nivå (Ref.
69278): 3.7 ±0.6 se; based on size and trophs of closest relatives
Resiliens (Ref.
120179): Hög, lägsta populationsfördubblingstid mindre än 15 månader (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
