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139 results for “Varanus”
FIGURE 1 in Molecular and morphological assessment of Varanus pilbarensis (Squamata: Varanidae), with a description of a new species from the southern Pilbara, Western Australia
FIGURE 1. Maximum Likelihood phylogeny of the V. pilbarensis species-group and selected outgroups estimated from 663 base pairs of ND4 and tRNA data. Branches are not shown for more distant outgroups (Varanus acanthurus DQ525100, Varanus baritji DQ525106, Varanus storri DQ631869).
FIGURE 3 in Molecular and morphological assessment of Varanus pilbarensis (Squamata: Varanidae), with a description of a new species from the southern Pilbara, Western Australia
FIGURE 3. Details of primary dorsal scales and granules in (A) WAM R102103, V. pilbarensis and (B) WAM R129628, V. hamersleyensis sp. nov.. Scale bar 1 cm.
FIGURE 5. Adult V in Molecular and morphological assessment of Varanus pilbarensis (Squamata: Varanidae), with a description of a new species from the southern Pilbara, Western Australia
FIGURE 5. Adult V. pilbarensis photographed in life from (A) Ord Ranges and (B) 55 km ENE Pannawonica, (images—J. Vo s).
FIGURE 4 in A review of the subgenus Euprepiosaurus of Varanus (Squamata: Varanidae): morphological and molecular phylogeny, distribution and zoogeography, with an identification key for the members of the V. indicus and the V. prasinus species groups
FIGURE 4. Maximum parsimony (MP) cladogram based on 548 bp of the mitochondrial 16S ribosomal RNA gene sequences. Values above the nodes represent bootstrap values in percent.
FIGURE 6 in A review of the subgenus Euprepiosaurus of Varanus (Squamata: Varanidae): morphological and molecular phylogeny, distribution and zoogeography, with an identification key for the members of the V. indicus and the V. prasinus species groups
FIGURE 6. Bayesian (PP) reconstruction based on 548 bp of the mitochondrial 16S ribosomal RNA gene sequences. Values above the nodes are Bayesian posterior probabilities.
FIGURE 5 in A review of the subgenus Euprepiosaurus of Varanus (Squamata: Varanidae): morphological and molecular phylogeny, distribution and zoogeography, with an identification key for the members of the V. indicus and the V. prasinus species groups
FIGURE 5. Neighbour-joining (NJ) phylogram based on 548 bp of the mitochondrial 16S ribosomal RNA gene sequences. Values above the nodes represent bootstrap values in percent.
FIGURE 3 in A review of the subgenus Euprepiosaurus of Varanus (Squamata: Varanidae): morphological and molecular phylogeny, distribution and zoogeography, with an identification key for the members of the V. indicus and the V. prasinus species groups
FIGURE 3. Distribution of the members of the V. prasinus species group in relation to significant biogeographic discontinuities within the Indo-Australian Archipelago (We — Weber's line, Ly — Lydekker's line): V. prasinus (1), V. beccarii (2), V. kordensis (3), V. bogerti (4), V. keithhornei (5), V. telenesetes (6), V. macraei (7), V. boehmei (8), V. reisingeri (9).
FIGURE 1 in A review of the subgenus Euprepiosaurus of Varanus (Squamata: Varanidae): morphological and molecular phylogeny, distribution and zoogeography, with an identification key for the members of the V. indicus and the V. prasinus species groups
FIGURE 1. Distribution of the members of the V. indicus species group in relation to significant biogeographic discontinuities within the Indo-Australian Archipelago (Wa — Wallace's line, We — Weber's line, Ly — Lydekker's line): Varanus indicus (1), V. doreanus (2), V. jobiensis (3), V. finschi (4), V. melinus (5), V. cerambonensis (6), V. juxtindicus (7), V. yuwonoi, V. caerulivirens, V. zugorum, and Varanus sp. n. (8). Note, the Pacific island populations of V. indicus are not included in the map for a better resolution and due to their possible anthropogenic origin; dotted lines indicate presumed distributions.
FIGURE 2 in A review of the subgenus Euprepiosaurus of Varanus (Squamata: Varanidae): morphological and molecular phylogeny, distribution and zoogeography, with an identification key for the members of the V. indicus and the V. prasinus species groups
FIGURE 2. Detailed distribution maps of the members of the V. indicus species group: A and B — Australo-Papuan region, C — Moluccas, D — Solomon Islands; question marks and dotted lines indicate presumed distributions.
Figure 12 in Two new species of monitor lizards (Squamata: Varanus) endemic to the Louisiade and Tanimbar Archipelagos with a key to the subgenus Euprepiosaurus
Figure 12. Adult Varanus tanimbar sp. nov. (WAM 109896) Lorulun, Yamdena Island (photo Richard How).
Figure 11 in Two new species of monitor lizards (Squamata: Varanus) endemic to the Louisiade and Tanimbar Archipelagos with a key to the subgenus Euprepiosaurus
Figure 11. Juvenile Varanus tanimbar sp. nov. caught by local hunters at Saumlaki, Yamdena (photo VW).
Figure 3 in Two new species of monitor lizards (Squamata: Varanus) endemic to the Louisiade and Tanimbar Archipelagos with a key to the subgenus Euprepiosaurus
Figure 3. Dorsal, ventral and head profile of the holotype (ZMUT Sa197) of Varanus louisiadensis sp. nov.
Figure 2 in Two new species of monitor lizards (Squamata: Varanus) endemic to the Louisiade and Tanimbar Archipelagos with a key to the subgenus Euprepiosaurus
Figure 2. Linear discriminant analysis showing morphospaces for members of the Varanus indicus group based on scalation characters P, Q, R, S, T, N, XY and m.
Figure 1 in Two new species of monitor lizards (Squamata: Varanus) endemic to the Louisiade and Tanimbar Archipelagos with a key to the subgenus Euprepiosaurus
Figure 1. Map of the western Pacific region showing the geographic ranges of the species of the Varanus indicus group.
Figure 10 in Two new species of monitor lizards (Squamata: Varanus) endemic to the Louisiade and Tanimbar Archipelagos with a key to the subgenus Euprepiosaurus
Figure 10. Adult Varanus tanimbar sp. nov. male killed by local hunters near Saumlaki, Yamdena (photo VW).
Figure 7 in Two new species of monitor lizards (Squamata: Varanus) endemic to the Louisiade and Tanimbar Archipelagos with a key to the subgenus Euprepiosaurus
Figure 7. Map of the Papuan region (A) with the Tanimbar Islands (B) and Louisiade Archipelago (C) enlarged. The type locality of Varanus louisiadensis sp. nov. on Misima island is indicated with a filled circle, and additional collection localities for the paratypes on Sudest and Rossell are indicated by open circles. The type locality of V. tanimbar sp. nov., Latdalam, is indicated by a filled star, and the collection locality of one of the paratypes at Adaut, Selary Island, with an open star.
Data from: Insights into the introduction history and population genetic dynamics of the Nile monitor (Varanus niloticus) in Florida
Open the record for dataset details and reuse information.
Data from: The roles of joint tissues and jaw muscles in palatal biomechanics of the Savannah monitor (Varanus exanthematicus) and their significance for cranial kinesis
Open the record for dataset details and reuse information.
Figure 4. Optimal maximum-likelihood tree resulting from the RAxML analysis. Bootstrap support values greater than 50 in Taxonomy of Micronesian monitors (Reptilia: Squamata: Varanus): endemic status of new species argues for caution in pursuing eradication plans
Figure 4. Optimal maximum-likelihood tree resulting from the RAxML analysis. Bootstrap support values greater than 50% are shown on the nodes. Scale bar corresponds to the mean number of nucleotide substitutions per site.
Data from: Using striated tooth marks on bone to predict body size in theropod dinosaurs: a model based on feeding observations of Varanus komodoensis, the Komodo monitor
Mesozoic tooth marks on bone surfaces directly link consumers to fossil assemblage formation. Striated tooth marks are believed to form by theropod denticle contact, and attempts have been made to identify theropod consumers by comparing these striations with denticle widths of contemporaneous taxa. The purpose of this study is to test whether ziphodont theropod consumer characteristics may be accurately identified from striated tooth marks on fossil surfaces. There are three major objectives; 1) experimentally produce striated tooth marks and explain how they form; 2) determine whether body size characteristics are reflected in denticle widths; 3) determine whether denticle characters are accurately transcribed onto bone surfaces in the form of striated tooth marks. Controlled feeding trials were conducted with the dental analogue Varanus komodoensis (the Komodo monitor). Goat (Capra hircus) carcasses were introduced to captive, isolated individuals. Striated tooth marks were then identified, and striation width, number, and degree of divergence were recorded for each. Denticle widths and tooth/body size characters were taken from photographs and published accounts of both theropod and V. komodoensis skeletal material, and regressions were compared among and between the two groups. Striated marks tend to be regularly striated with a variable degree of branching, and may co-occur with scores. Striation morphology directly reflects contact between the mesial carina and bone surfaces during the rostral reorientation when defleshing. Denticle width is primarily influenced by tooth size, and correlates well with body size displaying negative allometry in both groups regardless of taxon or position. When compared, striation widths fall within or below the range of denticle widths extrapolated for similar sized V. komodoensis individuals. Striation width is directly influenced by the orientation of the carina during feeding, and may underestimate but cannot overestimate denticle width. Although body size may theoretically be estimated solely by a striated tooth mark under ideal circumstances, many caveats should be considered. These include the influence of negative allometry across taxa and throughout ontogeny, the existence of theropods with extreme denticle widths, and the potential for striations to underestimate denticle widths. This method may be useful under specific circumstances, especially for establishing a lower limit body size for potential consumers.
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