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Ameca splendens, a New Genus and Species of Goodeid Fish from Western México, with Remarks on the Classification of the Goodeidae

Robert Rush Miller and John Michael Fitzsimons
Copeia
Vol. 1971, No. 1 (Mar. 8, 1971), pp. 1-13
DOI: 10.2307/1441593
Stable URL: http://www.jstor.org/stable/1441593
Page Count: 13
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Ameca splendens, a New Genus and Species of Goodeid Fish from Western México, with Remarks on the Classification of the Goodeidae
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Abstract

A new genus and species of goodeid fish is described from the Río Ameca basin, Pacific slope of western México. Distinctive traits of the family, including those associated with reproduction, are reviewed and the first karyotype is given. Ameca is shown to have 2n = 26 chromosomes (mostly metacentric), an apparently distinctive hemoglobin pattern, and an inability to hybridize in the laboratory with any of five species of goodeids tested. Rather than placing undue reliance on a few highly correlated, intraspecifically variable characters pertaining to the structure of the ovary and trophotaeniae, utilization of a diversity of characters is emphasized in discussing the classification of the family. The following synonymies are proposed or supported: Balsadichthys = Ilyodon; Lermichthys = Girardinichthys; Ollentodon and Neotoca = Skiffia; and Skiffia variegata = S. lermae. We suggest that Hubbsina lies along an evolutionary sequence leading to the two species of Girardinichthys and hence should be removed from the Goodeinae.

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