Overview

Comprehensive Description

Biology

Found in inlets and backwaters of rivers and streams. Forages mostly at twilight, stalking larger fishes to feed on their scales. Approaches its intended prey stealthily and usually aims at its flank. Strikes mostly with its mouth closed, dislodging the scales with its stout, external and forward-directed teeth. The jarring strike dislodges a few scales which are swallowed immediately if taken in the mouth, or gathered as they sink. Also feeds on aquatic insects (Ref. 40383).
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Distribution

South America: Paraguay and lower Paraná River basins.
  • Malabarba, L.R. and Z.M.S. de Lucena 1995 Phenacogaster jancupa, new species, with comments on the relationships and a new diagnosis of the genus (Ostariophysi: Characidae). Ichthyol. Explor. Freshwat. 6(4):337-344. (Ref. 26633)
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Widespread in South America: Paraná, Paraguay and Amazonas basins.
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Physical Description

Size

Max. size

8.9 cm SL (male/unsexed; (Ref. 36811))
  • Lucena, C.A.S. and N.A. Menezes 2003 Subfamily Characinae (Characins, tetras). p. 200-208. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 36811)
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Ecology

Habitat

Environment

benthopelagic; freshwater; pH range: 5.8 - 6.8; dH range: 8
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Trophic Strategy

Found in inlets and backwaters of rivers and streams. Forages mostly at twilight, stalking larger fishes to feed on their scales. Approaches its intended prey stealthily and usually aims at its flank. Strikes mostly with its mouth closed, dislodging the scales with its stout, external and forward-directed teeth. The jarring strike dislodges a few scales which are swallowed immediately if taken in the mouth, or gathered as they sink. Also feeds on aquatic insects (Ref. 40383). Food dominated by zooplankton (Ref. 56181).
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Roeboides descalvadensis

The following is a representative barcode sequence, the centroid of all available sequences for this species.


No available public DNA sequences.

Download FASTA File
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Statistics of barcoding coverage: Roeboides descalvadensis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 10
Specimens with Barcodes: 10
Species With Barcodes: 1
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Conservation

Threats

Not Evaluated
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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Disclaimer

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