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10 results for “Oplurus”
Data from: Defining spatial and temporal patterns of phylogeographic structure in Madagascar's iguanid lizards (Genus Oplurus)
Understanding the remarkably high species diversity and levels of endemism found among Madagascar's flora and fauna has been the focus of many studies. One hypothesis that has received much attention proposes that Pleistocene climate fluctuations spurred diversification. However, while spatial patterns of distribution and phylogenetic relationships can provide support for biogeographic predictions, temporal estimates of divergence are required to determine the fit of these geospatial patterns to climatic or biogeographic mechanisms. We use multilocus DNA sequence data to test whether divergence times among Malagasy iguanid lizards of the subfamily Oplurinae are compatible with a hypotheses of Quaternary diversification. We estimate the oplurine species tree and associated divergence times under a relaxed clock model. In addition, we examine the phylogeographic structure and population divergence times within two sister-species of Oplurus primarily distributed in the northwest and southwest of Madagascar (O. cuvieri and O. cyclurus, respectively). We find that divergence events among oplurine lineages occurred in the Oligocene and Miocene and are thus far older and incompatible with the hypothesis that recent climate fluctuations are related to current species diversity. However, the timing of intraspecific divergences and spatial patterns of population genetic structure within O. cuvieri and O. cyclurus suggest a role for both intrinsic barriers and recent climate fluctuations at population-level divergences. Integrating information across spatial and temporal scales allows us to identify and better understand the mechanisms generating patterns diversity.
FIGURE 8 in The rediscovery of Oplurus bibronii Guichenot, 1848 a valid species of the liolaemid genus Phymaturus (Iguania: Liolaemidae)
FIGURE 8. Dorsal view in life of Phymaturus paihuanense (junior synonym of P. bibronii) male (SSUC Re 0427).
FIGURE 7 in The rediscovery of Oplurus bibronii Guichenot, 1848 a valid species of the liolaemid genus Phymaturus (Iguania: Liolaemidae)
FIGURE 7. Dorsal view in life of Phymaturus bibronii female with ocellated dorsal design (SSUC Re 0431).
FIGURE 6 in The rediscovery of Oplurus bibronii Guichenot, 1848 a valid species of the liolaemid genus Phymaturus (Iguania: Liolaemidae)
FIGURE 6. Dorsal view in life of Phymaturus bibronii female with common dorsal pattern (SSUC Re 0430).
FIGURE 2 in The rediscovery of Oplurus bibronii Guichenot, 1848 a valid species of the liolaemid genus Phymaturus (Iguania: Liolaemidae)
FIGURE 2. Dorsal view of Phymaturus bibronii. Top: Lectotype MNHN (Paris) 2395. Bottom: MNHN (Paris) 2395A. Photograph by I. Ineich.
Data from: Defining spatial and temporal patterns of phylogeographic structure in Madagascar's iguanid lizards (Genus Oplurus)
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FIGURE 5 in The rediscovery of Oplurus bibronii Guichenot, 1848 a valid species of the liolaemid genus Phymaturus (Iguania: Liolaemidae)
FIGURE 5. Dorsal view in life of Phymaturus bibronii male (SSUC Re 0432).
FIGURE 1 in The rediscovery of Oplurus bibronii Guichenot, 1848 a valid species of the liolaemid genus Phymaturus (Iguania: Liolaemidae)
FIGURE 1. Illustration of Oplurus bibronii according to Gay (1854).
FIGURE 4 in The rediscovery of Oplurus bibronii Guichenot, 1848 a valid species of the liolaemid genus Phymaturus (Iguania: Liolaemidae)
FIGURE 4. Main diagnostic characters of the specimens studied. A) Lateral view of the head of Phymaturus bibronii (syntype MNHN (Paris) 2395A). B) Lateral view of the head of P. bibronii (topotype SSUC Re 0432). C) Lateral view of the head of P. paihuanense (= P. bibronii) (holotype MNHN-CL 4053). D) Lateral view of the head of Phymaturus sp. (MNHN (Paris) 1824A). E) Parietal scale of P. bibronii (syntype MNHN (Paris) 2395A). F) Parietal scale of Phymaturus sp. (MNHN (Paris) 1824). The arrows indicate the superciliaries scales, canthal scale, subocular scale, scales between nasal and rostral, supralabials and interparietal scale.
FIGURE 3 in The rediscovery of Oplurus bibronii Guichenot, 1848 a valid species of the liolaemid genus Phymaturus (Iguania: Liolaemidae)
FIGURE 3. Dorsal view of Phymaturus sp. Top: MNHN (Paris) 1824A. Bottom: MNHN (Paris) 1824. Photograph by I. Ineich.
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