Overview

Distribution

Negro River and upper portion of Orinoco River basin: Brazil and Venezuela.
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South America: Negro River and upper portion of Orinoco River basin.
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Physical Description

Morphology

Dorsal soft rays (total): 9; Analsoft rays: 28 - 34; Vertebrae: 34
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Size

Max. size

3.4 cm SL (male/unsexed; (Ref. 36811))
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Diagnostic Description

A thin band of dark pigmentation present from dorsal to the anal fin base (lacking in H. macrolepis). Differs from H. virgulatus where this band and the longitudinal band extending from the posterior portion of the head to the caudal fin base is thicker and more heavily pigmented. Further, this species differs from H. virgulatus with its relatively smaller orbital diameter; more pointed posteroventral corner of preopercle; relatively elongate gill rakers along the epibranchial and hypobranchial portion of the first branchial arch; single ossification in the position primitively occupied by infraorbitals 4 and 5; small posterior dentary teeth beginning behind lateralmost tooth of the anterior row thus not forming a second internal teeth series (Ref. 38319).
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Type Information

Paratype for Heterocharax leptogrammus Toledo-Piza
Catalog Number: USNM 358587
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): M. Goulding
Year Collected: 1980
Locality: Brazil, Amazonas, Rio Arirara, Near Mouth, Amazonas, Brazil, South America
  • Paratype: Toledo-Piza, M. 2000. Ichthyological Exploration of Freshwaters. 11 (4): 301, fig. 13.
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Ecology

Habitat

Environment

benthopelagic; freshwater
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Conservation

Threats

Not Evaluated
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