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Acestrocephalus acutus in Brazil

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Acestrocephalus acutus   Menezes, 2006
Family:	Characidae (Characins) , subfamily: Characinae			picture (Acacu_f0.gif) by Menezes, N.A.
Order:	Characiformes  (characins)
Class:	Actinopterygii (ray-finned fishes)
FishBase name:
Max. size:	10.4 cm SL (male/unsexed; Ref. 75890)
Environment:	benthopelagic
Climate:	tropical
Global Importance:
Resilience:	High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)
Distribution:	South America: Rio Tocantins and rio Tapajós drainages in Brazil.
Diagnosis:	Dorsal soft rays (total): 11-11; 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) (Ref. 75890). Description: Dorsal fin ii,9; Anal fin iv,29-35; Pectoral fin i+11-14; Pelvic fin i+7 (Ref. 75890).
Biology:
Threatened:	Not Evaluated, see IUCN Red List  , (Ref. 36508)
Dangerous:	harmless
Coordinator:
Main Ref:	Menezes, N.A.. 2006. (Ref. 75890)
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Brazil country information
Common names:	[ No common name ]		Ref:
Status:	native		Ref:
Salinity:	freshwater
Regulations:	no regulations		Ref:
Uses:	no uses
Comments:	Known from rio Tocantins and rio Tapajós drainages (Ref. 75890).
States/Provinces:
States/Provinces Complete?:	No
Country Information:	www.cia.gov/cia/publications/factbook/geos/br.html
Occurrences:	Occurrences    Point map
Main Ref:	Menezes, N.A., 2006
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	Note: No data are available if label is black .
Tools:	Biogeographic modelling | E-book | Field guide | Length-frequency Wizard | Life-history tool | Point map |
Internet sources:	BiOSC Point Data | CISTI | Google | GOBASE | GenBank ( genome, nucleotide ) | PubMed | Scirus | Tree of Life |   Neodat | Zoological Record
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	Entered:  Torres, Armi G.

	Ref.:				Glossary
		(e.g. 9948)				(e.g. cephalopods)
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Page created by: Eli, 20.10.03, last modified by Eli, 26.06.07