Five new species of Pristimantis (Anura: Strabomantidae) from the coastal cloud forest of the Península de Paria, Venezuela
<p class="p1">Fieldwork in the cloud forest of Venezuela’s remote Península de Paria in 2001 resulted in the collection of several specimens that could unquestionably be classified as members of the genus <em>Pristimantis</em>. Subsequent analysis of comparative material...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wildlife Information Liaison Development Society
2015-04-01
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| Series: | Journal of Threatened Taxa |
| Subjects: | |
| Online Access: | http://threatenedtaxa.org/index.php/JoTT/article/view/1949 |
| Summary: | <p class="p1">Fieldwork in the cloud forest of Venezuela’s remote Península de Paria in 2001 resulted in the collection of several specimens that could unquestionably be classified as members of the genus <em>Pristimantis</em>. Subsequent analysis of comparative material in museum collections brought the total number of specimens to 44, and these collectively represent five new species. Two of these species, <em>P. geminus </em>sp. nov. and <em>P. nubisilva</em> sp. nov., have phenotypes remarkably similar to the Trinidadian <em>P. urichi,</em> supporting a prediction that <em>Pristimantis</em> from easternmost Venezuela may have given rise to Trinidadian forms. <em>Pristimantis hoogmoedi </em>sp. nov. is easily identified by its large size and red eyes. Two of the species, <em>P. longicorpus</em> sp. nov. and <em>P. pariagnomus </em>sp. nov., are very distinct morphologically but are known only from the holotypes. The former is characterized by an elongate body form supported by relatively short limbs, whereas the latter has very distinctive hand morphology and is likely the smallest Venezuelan frog. Chromosome banding studies of <em>P. nubisilva </em>sp. nov.<em> </em>and <em>P. hoogmoedi </em>sp. nov. revealed chromosome numbers of 2<em>n </em>= 36 and 2<em>n</em> = 26, respectively, with an unusual submetacentric fusion chromosome 11;18 in some males of the former and a unique meiotic pairing of chromosomes in males of the latter. All five species can be readily distinguished by their osteology, such as by the extent of the sphenethmoid and features on the roof of the mouth, as well as by the shape and rearrangement of mesopodial elements. The unexpectedly high diversity of <em>Pristimantis</em> in this region, along with high endemism of amphibians and reptiles in general, underscores the position of the Península de Paria as a center for frog biodiversity in Venezuela. The similarity of these Paria species to <em>Pristimantis</em> from Trinidad, Tobago and the central Cordillera de la Costa represents a tangible piece of evidence for the close biogeographic link of the anuran fauna of these landmasses.</p> |
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| ISSN: | 0974-7893 0974-7907 |