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194 results for “tepui”
Fig. 30 in Herpetofauna Of The Yutajé -Corocoro Massif, Venezuela: Second Report From The Robert G. Goelet American Museum-Terramar Expedition To The Northwestern Tepuis
Fig. 30. Southern Venezuelan species of Pseudopaludicola (not to same scale). Top: Pseudopaludicola llanera Lynch. Adult female
Phylogeography of the tepui brush finch, Atlapetes personatus (Passeriformes: Passerellidae): Extensive differentiation on the sky islands of the Venezuelan Pantepui
<p>The biogeography and genetic structure of species endemic to the high elevation sky islands (tepuis) of the Guiana Shield in eastern and southern Venezuela and adjacent areas of Brazil and Guyana are poorly known. We investigated the phylogeography and population structure of the tepui brush finch (<em>Atlapetes personatus</em>) as an exemplar of that biota. Mitochondrial DNA sequences revealed three monophyletic clades that correspond to major morphological subspecies groups occurring in eastern, southern, and northwestern regions of the Pantepui. Differentiation among the clades accounted for 95% of the total genetic variance. DNA sequences from three nuclear loci also showed marked divergence among those three regions. Estimates of gene flow between regions and sampled populations were all less than one individual per generation. Consequently, these subspecies groups ought to be recognized as species-level taxa. The results suggest there is more large-scale biogeographic structure within the Pantepui region than generally recognized. Additionally, within two of the three regions, genetic variance among tepuis was substantial at both mitochondrial and nuclear loci. Many of the sampled populations appear to be genetically independent units that are nearly cryptic morphologically. The sampled tepuis may be islands of habitat for this taxon and for conservation purposes.</p>
FIG. 1 in Bryophytes from Uei tepui (Serra do Sol), with liverworts new to Brazil and the description of Leptoscyphus incisus sp. nov.
FIG. 1. — Localization map of Uei tepui (Serra do Sol).
Fig. 46 in Herpetofauna Of The Yutajé -Corocoro Massif, Venezuela: Second Report From The Robert G. Goelet American Museum-Terramar Expedition To The Northwestern Tepuis
Fig. 46. Tropidurus panstictus, new species. Dorsal and ventral views of lowland paratypes, EBRG
Fig. 33 in Herpetofauna Of The Yutajé -Corocoro Massif, Venezuela: Second Report From The Robert G. Goelet American Museum-Terramar Expedition To The Northwestern Tepuis
Fig. 33. Tongue of Adercosaurus vixadnexus, new species (holotype).
Fig. 38 in Herpetofauna Of The Yutajé -Corocoro Massif, Venezuela: Second Report From The Robert G. Goelet American Museum-Terramar Expedition To The Northwestern Tepuis
Fig. 38. Adercosaurus vixadnexus, new species. Palmar view of right hand (holotype).
Phylogeography of the tepui brush finch, Atlapetes personatus (Passeriformes: Passerellidae): Extensive differentiation on the sky islands of the Venezuelan Pantepui
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FIGURE 2 in A new dendrobatid frog (Anura: Dendrobatidae: Colostethus) from Aprada tepui, southern Venezuela
FIGURE 2. View of the type locality (Cueva de El Fantasma, Aprada tepui) from inside. Note the size of the two helicopters at the entrance. This is the first geographic report and photograph of such immense "cave". Photo by Charles BrewerCarías.
FIGURE 9 in A new highland species of Arthrosaura Boulenger, 1885 (Squamata: Gymnophthalmidae) from Maringma tepui on the border of Guyana and Brazil
FIGURE 9. Arthrosaura hoogmoedi sp. nov., preserved female holotype (IRSNB 2653), 59.3 mm SVL. A: Detail of dorsal scales at midbody showing the 3–4 middorsal scales noticeably narrower than contiguous dorsal scales. B: Detail of perianal region.
FIGURE 7 in A new highland species of Arthrosaura Boulenger, 1885 (Squamata: Gymnophthalmidae) from Maringma tepui on the border of Guyana and Brazil
FIGURE 7. Lower eyelid condition in Arthrosaura hoogmoedi sp. nov. and two related Arthrosaura species. A: Semitransparent, unpigmented in A. kockii (IRSNB 15397). B: Semi-transparent, partly pigmented in A. guianensis (IRSNB 17343). C: Completely opaque, completely pigmented in A. hoogmoedi sp. nov. (IRSNB 2653, holotype).
FIGURE 6 in A new highland species of Arthrosaura Boulenger, 1885 (Squamata: Gymnophthalmidae) from Maringma tepui on the border of Guyana and Brazil
FIGURE 6. Arthrosaura hoogmoedi sp. nov., female holotype (IRSNB 2653), 59.3 mm SVL. Dorsal, ventral, and lateral views of head. Scale bar is 2 mm.
FIGURE 8 in A new highland species of Arthrosaura Boulenger, 1885 (Squamata: Gymnophthalmidae) from Maringma tepui on the border of Guyana and Brazil
FIGURE 8. Arthrosaura hoogmoedi sp. nov., female holotype (IRSNB 2653), 59.3 mm SVL. A: Ventral view in life. B: Detail of the gular region in life.
FIGURE 4 in A new highland species of Arthrosaura Boulenger, 1885 (Squamata: Gymnophthalmidae) from Maringma tepui on the border of Guyana and Brazil
FIGURE 4. Maringma tepui. Author's tent on the very top of the mountain; looking SWW, Mount Roraima is hidden by clouds (28 November 2007).
FIGURE 5 in A new highland species of Arthrosaura Boulenger, 1885 (Squamata: Gymnophthalmidae) from Maringma tepui on the border of Guyana and Brazil
FIGURE 5. Arthrosaura hoogmoedi sp. nov., female holotype (IRSNB 2653), 59.3 mm SVL. A: Dorsolateral view. B: Dorsal view.
FIGURE 2. Maringma tepui. A in A new highland species of Arthrosaura Boulenger, 1885 (Squamata: Gymnophthalmidae) from Maringma tepui on the border of Guyana and Brazil
FIGURE 2. Maringma tepui. A: Scenic view of the tepui from the east (20 November 2007). B: Dense vegetation on the summit plateau (28 November 2007).
FIGURE 1 in A new highland species of Arthrosaura Boulenger, 1885 (Squamata: Gymnophthalmidae) from Maringma tepui on the border of Guyana and Brazil
FIGURE 1. Area map of Maringma tepui showing the type locality of Arthrosaura hoogmoedi sp. nov. (blue dot). Coordinates and boundary with Brazil are approximate and based on the available map (note that there is a substantial difference in the country boundary between this map and that shown in Google Earth). Maps elaborated after "Roraima Sheet 40 SE" published by the Survey Department of Guyana, 1972, and a radar image of South America by NASA/JPL/ NIMA available at http://photojournal.jpl.nasa.gov/catalog/PIA03388.
FIGURE 10. A in A new highland species of Arthrosaura Boulenger, 1885 (Squamata: Gymnophthalmidae) from Maringma tepui on the border of Guyana and Brazil
FIGURE 10. A patch of Brocchinia tatei (Bromeliaceae), habitat on the summit plateau of Maringma tepui in which the holotype of Arthrosaura hoogmoedi sp. nov. was found.
FIGURE 3. Maringma tepui. A in A new highland species of Arthrosaura Boulenger, 1885 (Squamata: Gymnophthalmidae) from Maringma tepui on the border of Guyana and Brazil
FIGURE 3. Maringma tepui. A: View from the summit plateau of the mountain, looking to the west; Yakontipu is visible on the right (28 November 2007). B: Dense mist on the summit plateau, the usual climatic condition during our stay on the top of the tepui (25 November 2007).
FIGURE 5 in A new Pristimantis (Anura, Strabomantidae) from Yuruaní-tepui, Venezuela
FIGURE 5. Oscillogram and sonagram of the advertisement call of Pristimantis yuruanienis sp. nov. (specimen not collected).
FIGURE 3 in A new Pristimantis (Anura, Strabomantidae) from Yuruaní-tepui, Venezuela
FIGURE 3. Further specimens of Pristimantis yuruaniensis sp. nov. and its type locality. A-C: specimens not collected from Yuruaní-tepui. D: female Pristimantis yuruanienis sp. nov. with egg clutch in terrarium. This frog belongs to the type series, but there are no records as to which of them it is. E: type locality of Pristimantis yuruaniensis sp. nov. on top of Yuruaní-tepui. F: Pristimantis cf. yuruanienis, uncollected specimen photographed on Kukenán-tepui. Photos: H. Mägdefrau.
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