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Overview

Comprehensive Description

Astyanax aeneus :

MLP 9662, (2) 1 male, 1 female, 66.0-75.0 mm SL, Las Flores stream, Mexico , March 1998 .

  • Lucila C. Protogino, Amalia M. Miquelarena, Hugo L. López (2006): A new species of Astyanax (Teleostei, Characiformes, Characidae), with breeding tubercles, from the Paraná and Uruguay river basins. Zootaxa 1297, 1-16: 13-13, URL:http://www.zoobank.org/urn:lsid:zoobank.org:pub:8B4411D9-087E-4182-81EF-23D764E0FE27
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Biology

Inhabits all types of rivers and streams, from swift water to swamps and stagnant pools (Ref. 36880). Tolerates brackish water at sea level to small mountain brooks at 1000 m elevation (Ref. 36880). Forms schools over any type of substrate (Ref. 36880). Feeds on algae, seeds, leaves, aquatic and terrestrial insects and fish fry of any species (Ref. 36880). Spawns during most of the year at some sites or seasonally in other places (Ref. 36880).
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Distribution

Central America: lower Rio Papaloapan and Colima, Mexico south to some places in Central America (Ref. 30499), extending to the Rio Cocle del Norte and Rio Tabasara in Panama (Ref. 36880).
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Central America: Mexico to Colombia.
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Physical Description

Size

Maximum size: 75 mm SL
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Max. size

7.5 cm SL (male/unsexed; (Ref. 30499)); 12 cm SL (female)
  • Greenfield, D.W. and J.E. Thomerson 1997 Fishes of the continental waters of Belize. University Press of Florida, Florida. 311 p. (Ref. 30499)
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Diagnostic Description

Differs from A. nasutus and A. orthodus by its distinct humeral blotch and intermediate body depth. Sides and belly silvery over pearl white merging to a greenish brown back; in preserved specimens, a gray band runs from the humeral mark to the caudal peduncle which has a jet black rhomboidal mark extending to the tip of the middle caudal rays; transparent fins with minimal dark pigment; usually first rays of anal and sometimes dorsal and caudal fins with red or yellow pigment (Ref. 36880).
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Type Information

Paratype for Astyanax armandoi Lozano & Contreras
Catalog Number: USNM 308113
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): S. Contreras B.
Year Collected: 1988
Locality: Arroyo S/N En Penjamo. Chiapas, Mexico., Chiapas, Mexico, North America
  • Paratype: Lozano, V. & Contreras, B. 1990. Universidad y Ciencia. 7 (14): 97.
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Ecology

Habitat

Environment

benthopelagic; freshwater; brackish
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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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