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Two new species of Xiphophorus (Poeciliidae) from the Isthmus of Tehuantepec, Oaxaca, Mexico, with a discussion of the distribution of the X. clemenciae clade. American Museum novitates ; no. 3441

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dc.contributor.author Kallman, Klaus D. en_US
dc.contributor.author Walter, Ronald B.
dc.contributor.author Morizot, Donald C.
dc.contributor.author Kazianis, Steven.
dc.date.accessioned 2005-10-06T16:38:57Z
dc.date.available 2005-10-06T16:38:57Z
dc.date.issued 2004 en_US
dc.identifier.uri http://hdl.handle.net/2246/2806
dc.description 34 p. : ill., 2 col. maps ; 26 cm. en_US
dc.description Includes bibliographical references (p. 26-27). en_US
dc.description.abstract The swordtail, Xiphophorus clemenciae (Poeciliidae), has been considered a species of special concern because of its apparent limited range. Although described in 1959, it is officially still known only from three locations in the Rio Coatzacoalcos basin, Mexico. Zoogeographic studies have now shown that this species is widespread and abundant but restricted to the uplands of the Rio Coatzacolacos basin where it replaces in many areas the common swordtail, X. helleri. Two new swordtail taxa, X. mixei and X. monticolus, are described from headwater streams of the Rio Jaltepec, a major Rio Coatzacoalcos tributary, Oaxaca, Mexico. The new forms are sympatric in part of their range and replace both X. clemenciae and X. helleri. Morphometric and molecular analyses revealed that X. clemenciae and the two new species constitute a monophyletic clade that exhibits a closer evolutionary affinity to the "northern" swordtails and the "platyfish" group of the genus rather than to X. helleri and the other "southern" swordtails. The evolutionary relationships of these taxa are discussed. en_US
dc.format.extent 1664309 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York, NY : American Museum of Natural History en_US
dc.relation.ispartofseries American Museum novitates ; no. 3441 en_US
dc.subject.lcc QL1 .A436 no.3441 2004 en_US
dc.subject.lcsh Xiphophorus mixei. en_US
dc.subject.lcsh Xiphophorus monticolus. en_US
dc.subject.lcsh Xiphophorus -- Mexico -- Coatzacoalcos River Valley. en_US
dc.subject.lcsh Xiphophorus -- Mexico -- Tehuantepec, Isthmus of -- Geographical distribution. en_US
dc.subject.lcsh Xiphophorus -- Phylogeny. en_US
dc.subject.lcsh Fishes -- Mexico -- Coatzacoalcos River Valley. en_US
dc.subject.lcsh Fishes -- Mexico -- Tehuantepec, Isthmus of -- Geographical distribution. en_US
dc.title Two new species of Xiphophorus (Poeciliidae) from the Isthmus of Tehuantepec, Oaxaca, Mexico, with a discussion of the distribution of the X. clemenciae clade. American Museum novitates ; no. 3441 en_US
dc.title.alternative New swordtails from Oaxaca, Mexico. en_US
dc.type text en_US


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  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

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