Overview

Comprehensive Description

Biology

Inhabits spring, most adults occur in the upper meter of the water column and near the margins of the cattails or in the growth of cattails surrounding the spring. Few individuals are found in the open water column and near the substrate; relatively few fish are seen in the shallow marginal waters. Forms schools of at least 500-600 individuals .
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Distribution

North America: endemic to Guzman basin, northern Mexico.
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Chihuahua, Mexico.
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Physical Description

Morphology

Dorsal spines (total): 0; Dorsal soft rays (total): 8 - 9; Analspines: 0; Analsoft rays: 7 - 9; Vertebrae: 30 - 32
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Size

Maximum size: 40.7 mm SL
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Max. size

4.1 cm SL (male/unsexed; (Ref. 13265))
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Diagnostic Description

Modally 8 anal-fin rays; 29 or more predorsal circumferential scales; absence of basicaudal spot; breast fully scaled; upper jaw large, length greater than 9.4% SL, extending under orbit; gular stripe reaching under orbit, not to isthmus; breeding males with many large tubercles over head, with narrow gap on rostrum, not organized into rows, less than 16 non-marginal tubercles on caudal-peduncle scales; both breeding males and females with distinct plum-colored lateral stripe below iridescent light-yellow stole; and scapular bar absent or weak; mouth terminal to subterminal (Ref. 42680).
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Type Information

Paratype for Notropis bocagrande Chernoff & Miller
Catalog Number: USNM 226900
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): B. Chernoff & M. Smith
Year Collected: 1979
Locality: Mexico: Chihuahua; Ojo Solo, 39 km NW Villa Ahumada., Chihuahua, Mexico, North America
  • Paratype: Chernoff, B. & Miller, R. R. 1982. Copeia. 1982 (3): 514.
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Ecology

Habitat

Habitat and Ecology

Systems
  • Freshwater
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Environment

benthopelagic; freshwater
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
CR
Critically Endangered

Red List Criteria
A2e, C2b

Version
2.3

Year Assessed
1996
  • Needs updating

Assessor/s
Contreras-Balderas, S. & Almada-Villela, P.

Reviewer/s

Contributor/s

History
  • 1994
    Vulnerable
    (Groombridge 1994)
  • 1990
    Vulnerable
    (IUCN 1990)
  • 1988
    Vulnerable
    (IUCN Conservation Monitoring Centre 1988)
  • 1986
    Vulnerable
    (IUCN Conservation Monitoring Centre 1986)
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Threats

Critically Endangered (CR) (A2e, C2b)
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Wikipedia

Largemouth shiner

The largemouth shiner (Cyprinella bocagrande) is a species of ray-finned fish in the Cyprinidae family. It is found only in Mexico, where it is called sardinita bocagrande.

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