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.authorKallman, Klaus D.en_US
dc.contributor.authorWalter, Ronald B.
dc.contributor.authorMorizot, Donald C.
dc.contributor.authorKazianis, Steven.
dc.date.accessioned2005-10-06T16:38:57Z
dc.date.available2005-10-06T16:38:57Z
dc.date.issued2004en_US
dc.description34 p. : ill., 2 col. maps ; 26 cm.en_US
dc.descriptionIncludes bibliographical references (p. 26-27).en_US
dc.description.abstractThe 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.extent1664309 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/2806
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York, NY : American Museum of Natural Historyen_US
dc.relation.ispartofseriesAmerican Museum novitates ; no. 3441en_US
dc.subject.lccQL1 .A436 no.3441 2004en_US
dc.subject.lcshXiphophorus mixei.en_US
dc.subject.lcshXiphophorus monticolus.en_US
dc.subject.lcshXiphophorus -- Mexico -- Coatzacoalcos River Valley.en_US
dc.subject.lcshXiphophorus -- Mexico -- Tehuantepec, Isthmus of -- Geographical distribution.en_US
dc.subject.lcshXiphophorus -- Phylogeny.en_US
dc.subject.lcshFishes -- Mexico -- Coatzacoalcos River Valley.en_US
dc.subject.lcshFishes -- Mexico -- Tehuantepec, Isthmus of -- Geographical distribution.en_US
dc.titleTwo 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. 3441en_US
dc.title.alternativeNew swordtails from Oaxaca, Mexico.en_US
dc.typetexten_US

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