Five new species of Pristimantis (Anura: Strabomantidae) from the coastal cloud forest of the Península de Paria, Venezuela

Journal of Threatened Taxa

卷:7

César L. Barrio-Amorós¹  Hinrich Kaiser²  Gilson A. Rivas³  Michael Schmid⁴  Claus Steinlein⁵ 

[1] andDepartment of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20013, USA;

[2] Department of Biology, Victor Valley College, 18422 Bear Valley Road, Victorville, California 92395, USA;

[3] Doc Frog Expeditions, Apartado Postal 220-8000, San José, Perez Zeledon, San Isidro del General 11901, Costa Rica;

[4] Institut für Humangenetik, Universität Würzburg, Biozentrum Am Hubland, 97074 Würzburg, Germany;

[5] Museo de Biologia, Facultad Experimental de Ciencias, La Universidad del Zulia, Apartado Postal 526, Maracaibo 4011, Maracaibo, Venezuela;

关键词: Biogeography;    chromosomes;    new species;    osteology;    Península de Paria;    Pristimantis;    taxonomy;    Trinidad;    Tobago;    Venezuela.;   

DOI  :  10.11609/JoTT.o4197.7047-88

来源: DOAJ

【 摘 要 】

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 Pristimantis.  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, P. geminus sp. nov. and P. nubisilva sp. nov., have phenotypes remarkably similar to the Trinidadian P. urichi, supporting a prediction that Pristimantis from easternmost Venezuela may have given rise to Trinidadian forms. Pristimantis hoogmoedi sp. nov. is easily identified by its large size and red eyes. Two of the species, P. longicorpus sp. nov. and P. pariagnomus 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 P. nubisilva sp. nov. and P. hoogmoedi sp. nov. revealed chromosome numbers of 2n = 36 and 2n = 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 Pristimantis 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 Pristimantis 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.

【 授权许可】

Unknown