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12 results for “Bradypodion”
Data from: Does diet drive the evolution of head shape and bite force in chameleons of the genus Bradypodion?
The head is a complex integrated system that is implicated in many vital functions. As such, its morphology is impacted by different and sometimes conflicting demands. Consequently, head shape varies greatly depending on the environment and dietary ecology of an organism. Moreover, given its role in territory defence and mating in lizards, it is also subjected to strong sexual selection in these animals. We investigated the relationships between head shape, bite performance and diet in 14 of the 17 extant Bradypodion species to determine whether variation in diet can explain the observed diversity in bite force and head shape in this genus. We also evaluate differences between sexes in terms of the relationships between head shape, bite force and diet and predict tighter relationships in females given that the head in this sex is principally under natural selection. Our results show that there is indeed a correlation between head shape, diet and bite force, but the direction and magnitude are sex-dependent. Whereas we observed a correlation between absolute bite force and head shape in both sexes, size-corrected bite force was correlated with mandible and quadrate shape in females only. Despite strong correlations between bite force and prey hardness, and between prey hardness and head shape, we did not find any relationship between head shape and prey evasiveness. These data suggest that the cranial system in chameleons of the genus Bradypodion evolves under natural selection for the ability to eat large or hard prey. Moreover, significant differences in the ecomorphological relationships between the two sexes suggest that sexual selection plays a role in driving the evolution of bite force and head shape. These data suggest that ecomorphological relationships may be sex-dependent.
FIGURE 2 in A review of the systematics of the genus Bradypodion (Sauria: Chamaeleonidae), with the description of two new genera
FIGURE 2. Bayesian consensus tree for the family Chamaelonidae. The range of posterior probabilites (pp) from 4 independent runs are given on each node (* = 100 pp). Values are not given where nodes are unsupported (<0.95 pp). Sample numbers correspond with Table 1.
FIGURE 1 in A review of the systematics of the genus Bradypodion (Sauria: Chamaeleonidae), with the description of two new genera
FIGURE 1. Combined locality map of Bradypodion sensu lato demonstrating geographic distribution patterns of two broad groups within the genus sensu Klaver & Bhme 1986. Red dots indicate records for Southern African Bradypodion and black dots indicate records for the "fischeri complex". Data locality points are based on specimens from seventeen museum collections.
FIGURE 1 in A new species of dwarf chameleon (Sauria; Chamaeleonidae, Bradypodion Fitzinger) from KwaZulu Natal South Africa with notes on recent climatic shifts and their influence on speciation in the genus
FIGURE 1. Forest localities for Bradypodion in KwaZulu-Natal. Forests are shown in black, with other vegetation types in grey (lightest to darkest: thicket, grassland, savanna). Map insets show the locations of the enlarged areas. The distribution of forests is shown by the black speckling in the inset of South Africa.
FIGURE 7 in A new species of dwarf chameleon (Sauria; Chamaeleonidae, Bradypodion Fitzinger) from KwaZulu Natal South Africa with notes on recent climatic shifts and their influence on speciation in the genus
FIGURE 7. Bradypodion nemorale, adult male, Qudeni Forest, KZN. Demonstrating phenotypic variation compared to same species from Nkandla Forest.
FIGURE 2 in A new species of dwarf chameleon (Sauria; Chamaeleonidae, Bradypodion Fitzinger) from KwaZulu Natal South Africa with notes on recent climatic shifts and their influence on speciation in the genus
FIGURE 2. Bayesian consensus phylogram for the genus Bradypodion, including chameleons from six forests in KwaZulu-Natal. Bayesian posterior probabilities are given above each node, whereas parsimony bootstrap values are given below each node. Only supported nodes are labeled.
FIGURE 6 in A new species of dwarf chameleon (Sauria; Chamaeleonidae, Bradypodion Fitzinger) from KwaZulu Natal South Africa with notes on recent climatic shifts and their influence on speciation in the genus
FIGURE 6. Bradypodion nemorale, adult male, Nkandla Forest, KZN. Demonstrating red interstitial web on the flank and superficial similarity to Bradypodion caeruleogula (compare Figure 9). Photo by Marius Burger
Data from: Does diet drive the evolution of head shape and bite force in chameleons of the genus Bradypodion?
Open the record for dataset details and reuse information.
- *4K* Video - Cape Dwarf Chameleon (Bradypodion pumilum) head and brain 3D rendering
<p>4K movie displaying the 3D rendering of the head and both the morphological features and spatial organization of the main encephalic subdivisions of the Cape Dwarf Chameleon. The brain reconstruction was obtained from a microCT scan of a iodine-stained specimen through manual segmentation using the software Amira 5.5.0.</p> <p>Other videos can be found <strong><a href="https://zenodo.org/search?page=1&size=20&q=keywords:%22squamate%20brain%22">here</a></strong>.</p> <p><em>If you are interested in reptile brain evolution and behavior, please, have a look to our recent publication:</em></p> <p><a href="https://www.nature.com/articles/s41467-019-13405-w"><em><strong>"Comparative analysis of squamate brains unveils multi-level variation in cerebellar architecture associated with locomotor specialization"</strong></em></a></p> <p><strong>Simone Macrì, Yoland Savriama, Imran Khan & Nicolas Di-Poï</strong></p> <p><em>Nature Communications</em> <strong>10, </strong>5560 (2019)</p> <p> </p> <p>For any inquiries or additional information, please, refer to the contacts provided in the <strong><a href="https://www.nature.com/articles/s41467-019-13405-w">article</a></strong>.</p>
FIGURE 5 in A new species of dwarf chameleon (Sauria; Chamaeleonidae, Bradypodion Fitzinger) from KwaZulu Natal South Africa with notes on recent climatic shifts and their influence on speciation in the genus
FIGURE 5. Bradypodion ngomeense sp. nov. Adult female, Ngome Forest, KZN.
FIGURE 4 in A new species of dwarf chameleon (Sauria; Chamaeleonidae, Bradypodion Fitzinger) from KwaZulu Natal South Africa with notes on recent climatic shifts and their influence on speciation in the genus
FIGURE 4. Bradypodion ngomeense sp. nov. Adult male, Ngome Forest, KZN.
FIGURE 3 in A new species of dwarf chameleon (Sauria; Chamaeleonidae, Bradypodion Fitzinger) from KwaZulu Natal South Africa with notes on recent climatic shifts and their influence on speciation in the genus
FIGURE 3. Head detail of Bradypodion ngomeense sp. nov. Adult male.
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