On the uniquely fragmented distribution of a rare Panamanian snake, Dipsas nicholsi (Colubridae, Dipsadinae) ; American Museum novitates, no. 3554

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dc.contributor.authorMyers, Charles W.en_US
dc.contributor.authorIbáñez D., Roberto.en_US
dc.contributor.authorCadle, John E.en_US
dc.date.accessioned2007-03-23T16:22:29Z
dc.date.available2007-03-23T16:22:29Z
dc.date.issued2007en_US
dc.description18 p. : ill. (some col.), maps ; 26 cm.en_US
dc.descriptionIncludes bibliographical references (p. 16-17).en_US
dc.description.abstractDipsas nicholsi has been known from a handful of specimens collected during the final three-quarters of the 20th century. All came from a restricted lowland area (60-150 m) in central Panama, in the upper drainage of the Río Chagres. A recently identified specimen, the first known juvenile and only the second female, was found in 1997 in the Darién highlands (Serranía de Jingurudó, 855 m) of extreme eastern Panama, about 250 km from the clustered lowland localities in central Panama. It differs from central Panamanian specimens in some scutellation characters and especially in details of dorsal color pattern. The species' rarity makes it impossible to determine whether differences reflect geographic isolation or unknown aspects of ontogenetic, sexual, or individual variation. Distributional disruptions are commonplace in the Panamanian herpetofauna, although difficult to verify in the case of rare species. However, in the absence of a present-day habitat corridor, the Darién specimen of Dipsas nicholsi clearly represents a population widely separated and discontinuous from the one in central Panama. The Serranía de Jingurudó population, apparently a distributional relict, slightly closes the wide geographic gap between Dipsas nicholsi and its likely sister species, D. andiana, of western Ecuador. Commentary is provided on the cartographic names of several eastern Panamanian highlands. The Serranía de Jingurudó takes its name from a river, as shown by the Emberá suffix -dó. This highland was known for nearly half a century as the Sierra or Serranía de "Jungurudó", probably a confused combination of a still-older map name (Sierra de "Jungururo") and the Río Jingurudo.en_US
dc.format.extent2914379 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/5842
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York, NY : American Museum of Natural Historyen_US
dc.relation.ispartofseriesAmerican Museum novitates, no. 3554en_US
dc.subject.lccQL1 .A436 no.3554 2007en_US
dc.subject.lcshDipsas nicholsi -- Geographical distribution.en_US
dc.subject.lcshDipsas nicholsi -- Panama -- Darien (Province)en_US
dc.subject.lcshDipsas -- Panama -- Geographical distribution.en_US
dc.subject.lcshFragmented landscapes -- Panama.en_US
dc.subject.lcshRelicts (Biology) -- Panama.en_US
dc.subject.lcshRare reptiles -- Panama -- Geographical distribution.en_US
dc.subject.lcshRare reptiles -- Panama -- Darien (Province)en_US
dc.subject.lcshNames, Geographical -- Panama -- Darien (Province)en_US
dc.subject.lcshSnakes -- Panama -- Geographical distribution.en_US
dc.subject.lcshSnakes -- Panama -- Darien (Province)en_US
dc.subject.lcshReptiles -- Panama -- Geographical distribution.en_US
dc.subject.lcshReptiles -- Panama -- Darien (Province)en_US
dc.subject.lcshDarien (Panama : Province)en_US
dc.subject.lcshPanamaen_US
dc.titleOn the uniquely fragmented distribution of a rare Panamanian snake, Dipsas nicholsi (Colubridae, Dipsadinae) ; American Museum novitates, no. 3554en_US
dc.title.alternativeRare Panamanian snakeen_US
dc.typetexten_US

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