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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
Published by: Southwestern Association of Naturalists
Stable URL: http://www.jstor.org/stable/3670257
Page Count: 7
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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.
The Southwestern Naturalist © 1978 Southwestern Association of Naturalists