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Journal Article

Taxonomic Status of Rhinichthys osculus (Cyprinidae) in the Moapa River, Nevada

Jack E. Williams
The Southwestern Naturalist
Vol. 23, No. 3 (Aug. 10, 1978), pp. 511-517
DOI: 10.2307/3670257
Stable URL: http://www.jstor.org/stable/3670257
Page Count: 7

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Topics: Rivers, Freshwater fishes, Head, Peduncle, Fish, Lakes, Vertebrae, Animal fins, Holotypes, Game fishes
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Taxonomic Status of Rhinichthys osculus (Cyprinidae) in the Moapa River, Nevada
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Abstract

Specimens of Rhinichthys osculus collected from the Moapa River between 1963 and 1967 were examined to determine their taxonomic status relative to other populations of R. osculus in southern Nevada. The Moapa River population is distinct, and is regarded as a new subspecies. The new subspecies is characterized by adaptations to its swift water habitat, including expansive, falcate dorsal and anal fins and expansive, deeply forked caudals. Meristically, the new subspecies exhibits characteristics intermediate between those of R. o. velifer and R. o. yarrowi.

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