Acestrocephalus Acutus

📖 Overview

Acestrocephalus Acutus (Acestrocephalus acutus) is a ray-finned fish of the family Characidae. It inhabits freshwater waters. This species can reach a maximum total length of 10.4 cm. With a trophic level of 3.7, it is a mid-level predator. It is assessed as Least Concern on the IUCN Red List.

🔬 Taxonomy

🐟 Physical Description

Dorsal soft rays (total): 11; Anal soft rays: 33 - 39; Vertebrae: 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) . : fusiform / normal.

🌀 Behaviour

Behavioural data for Acestrocephalus Acutus is currently being reviewed.

🦐 Diet

Diet information for Acestrocephalus Acutus is currently being compiled.

🥚 Reproduction

Reproduction data for Acestrocephalus Acutus is currently being compiled.

🌍 Habitat & Distribution

Freshwater; benthopelagic. Tropical South America: Rio Tocantins and rio Tapajós drainages in Brazil.

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

🛡️ Conservation Assessment

📊 Population Risk & Fisheries

🐠 Related Species

🔍 Similar Species

👥 Community & Contribute