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174 results for “Chameleons”
Supplementary data for "Armored with skin and bone: A combined histological and µCT study of the exceptional integument of the Antsingy leaf chameleon Brookesia perarmata (Angel, 1933)"
<p>This project contains the supplementary µCT-scans of the whole body and a lateral flank integumentary armor of <em>Brookesia perarmata</em> (Angel, 1933) (Squamata: Iguania: Chamaeleonidae) belonging to the following publication:</p> <p>Schucht P, Rühr PT, Geier B, Glaw F & M LAmbertz (<strong>2020</strong>): Armored with skin and bone: A combined histological and µCT study of the exceptional integument of the Antsingy leaf chameleon <em>Brookesia perarmata</em> (Angel, 1933). <em>Journal of Morphology</em>. doi: <a href="https://onlinelibrary.wiley.com/doi/full/10.1002/jmor.21135">10.1002/jmor.21135</a>.</p> <p> </p> <p><strong>Whole body scan:</strong></p> <ul> <li>specimen: ZSM 17/2006, Zoologische Staatssammlung München</li> <li>machine: phoenix nanotom m (GE Measurement & Control)</li> <li>scan settings: <ul> <li>tube voltage = 110 kV</li> <li>ube current = 70 μA</li> <li>target = tungsten</li> <li>no filter</li> <li>total sample rotation = 360°</li> <li>angular step size = 0.24°</li> <li>exposure time = 750 ms</li> <li>binning = 1</li> <li>averaging = 4</li> <li>voxel size = 37.8 μm</li> </ul> </li> <li>filename: Schucht_B_perarmata_whole.tif</li> </ul> <p> </p> <p><strong>Lateral flank integumentary armor scan:</strong></p> <ul> <li>specimen: ZSM 862/2000, Zoologische Staatssammlung München</li> <li>machine: Skyscan 1272 device (Bruker microCT)</li> <li>scan settings: <ul> <li>tube voltage = 70 kV</li> <li>ube current = 142 μA</li> <li>target = tungsten</li> <li>filter = Al 0.5 mm</li> <li>total sample rotation = 180°</li> <li>angular step size = 0.19°</li> <li>exposure time = 1925 ms</li> <li>binning = 2x2</li> <li>averaging = 8</li> <li>random movement = 15</li> <li>voxel size = 4.4 μm</li> </ul> </li> <li>filename: Schucht_B_perarmata_osteoderm.tif</li> </ul>
Chameleon bare metal cloud traces (2020-09-03)
<p>This cloud trace contains instance events and machine events for the bare-metal clouds on the Chameleon testbed since it was built in 2015. Several text fields have been anonymized to hide user information.</p> <ul> <li>This trace contains data from 2015-06-17T17:54:29.000Z until 2020-09-03T01:51:34.000Z. </li> <li>The epoch time for timestamps is 2015-06-17T00:00:00.</li> <li>It follows <strong>version 0.3</strong> of the <a href="http://press3.mcs.anl.gov/scienceclouds/cloud-traces/cloud-trace-format/">cloud trace format</a>.</li> </ul> <p>You can find more information and trace datasets at <a href="https://www.scienceclouds.org/cloud-traces">Science Clouds</a>.</p>
Chameleon KVM cloud traces (2020-09-04)
<p>This cloud trace contains Nova compute events for the OpenStack KVM cloud on the Chameleon testbed since it was built in 2015. Several text fields have been anonymized to hide user information.</p> <ul> <li>This is the last set of traces for the KVM cloud built in 2015 in a file "chameleon_legacy_kvm_tacc_2020_02_03.zip". Chameleon deprecated the legacy KVM site in February 2020 and future versions of this deposition will not include this historical trace data.</li> <li>This trace contains data from 2015-09-17T15:37:05.000Z until 2020-02-03T06:23:40.000Z.</li> <li>The epoch time for timestamps is 2015-09-06T00:00:00.</li> <li>It follows version 0.3 of the <a href="http://press3.mcs.anl.gov/scienceclouds/cloud-traces/cloud-trace-format/">cloud trace format</a>.</li> </ul> <p>You can find more information and trace datasets at <a href="https://www.scienceclouds.org/cloud-traces">Science Clouds</a>.</p>
Chameleon biogeographic dispersal associated with extreme life history strategies
<div class="t-landing__text-wall "> <p>This dataset contains data and code that support the results in Weil, S.-S., Gallien, L., Lavergne, S., Börger, L., Hassler, G., Nicolaï, Michaël P. J., Allen, William L. (2022) Chameleon biogeographic dispersal associated with extreme life history strategies (DOI<strong>: </strong><span>10.1111/ecog.06323</span>).</p> <p>We used species distribution, phylogenetic and life history trait data of 181 chameleons to determine the relationship between three traits (coastal distribution, body size, position on the fast/slow life history continuum) and past dispersal probability on an evolutionary timescale using trait-dependent biogeographic models.</p> <p>We found that all three traits were associated with past biogeographical movements. Lineages having coastal distributions and those with large bodies had higher dispersal probabilities. Interestingly, chameleons with either very fast or very slow life history were more successful dispersers than species with an intermediate strategy. Together, the three traits "coastal, large-bodied and extreme life history" form a dispersal syndrome.</p> </div>
Fig. 2 in Parasite burden in a short-lived chameleon, Furcifer labordi
Fig. 2. Composition of gastrointestinal parasite taxa in the fecal samples of A) adult F. labordi and B) adult F. cf. nicosiai from January to June and in total.
Fig. 4 in Parasite burden in a short-lived chameleon, Furcifer labordi
Fig. 4. Prevalence of mite infestation in A) F. labordi males and females, B) F. labordi and F. cf. nicosiai.
Fig. 4 in New distribution records, observations on natural history, and notes on reproduction of the poorly known Sudanese Unicorn Chameleon (Chamaeleonidae: Trioceros conirostratus) from Uganda, Africa
Fig. 4. Examples of Sudanese Unicorn Chameleons (Trioceros conirostratus) displaying a threatened posture with the mouth open. (A) Threatened male from Morongole Central Forest Reserve (CFR) displaying a temporal pouch filled with brown odiferous material (in-detail); (B) Another threatened male from Morongole CFR demonstrating an empty temporal pouch depleted after being handled (in-detail).
Fig. 5. A in New distribution records, observations on natural history, and notes on reproduction of the poorly known Sudanese Unicorn Chameleon (Chamaeleonidae: Trioceros conirostratus) from Uganda, Africa
Fig. 5. A developing embryo of the Sudanese Unicorn Chameleon (Trioceros conirostratus), removed from a female oviduct. Scale bar = 1 mm.
Fig. 3 in New distribution records, observations on natural history, and notes on reproduction of the poorly known Sudanese Unicorn Chameleon (Chamaeleonidae: Trioceros conirostratus) from Uganda, Africa
Fig. 3. Representatives of the Sudanese Unicorn Chameleon (Trioceros conirostratus) and local habitats from the three "northern" Central Forest Reserves (CFR) surveyed in Northern Region, Uganda, Africa. Sub-adult male and female from Orom CFR (top row), male and female from Morongole CFR (middle row), and juvenile male and juvenile female from Agoro-Agu CFR (bottom row).
Fig. 2 in New distribution records, observations on natural history, and notes on reproduction of the poorly known Sudanese Unicorn Chameleon (Chamaeleonidae: Trioceros conirostratus) from Uganda, Africa
Fig. 2. Representatives of the Sudanese Unicorn Chameleon (Trioceros conirostratus) and local habitats from the three "southern" Central Forest Reserves (CFR) surveyed in Northern Region, Uganda, Africa. Male and female from Kadam CFR (top row), male and female from Moroto CFR (middle row), and male and female from Napak CFR (bottom row).
Linked collectors and determiners for: Endangered beauties: micro-CT cranial osteology, molecular genetics and external morphology reveal three new species of chameleons in the Calumma boettgeri complex (Squamata: Chamaeleonidae).
Natural history specimen data linked to collectors and determiners held within, "Endangered beauties: micro-CT cranial osteology, molecular genetics and external morphology reveal three new species of chameleons in the Calumma boettgeri complex (Squamata: Chamaeleonidae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/99b3b009-f006-4146-b335-cbfdc2fcd60b">https://bionomia.net/dataset/99b3b009-f006-4146-b335-cbfdc2fcd60b</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/99b3b009-f006-4146-b335-cbfdc2fcd60b">https://gbif.org/dataset/99b3b009-f006-4146-b335-cbfdc2fcd60b</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: Rivaling the World's Smallest Reptiles: Discovery of Miniaturized and Microendemic New Species of Leaf Chameleons (Brookesia) from Northern Madagascar.
Natural history specimen data linked to collectors and determiners held within, "Rivaling the World's Smallest Reptiles: Discovery of Miniaturized and Microendemic New Species of Leaf Chameleons (Brookesia) from Northern Madagascar". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/898ecee8-1c5a-4969-b340-03a52d6bb1bd">https://bionomia.net/dataset/898ecee8-1c5a-4969-b340-03a52d6bb1bd</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/898ecee8-1c5a-4969-b340-03a52d6bb1bd">https://gbif.org/dataset/898ecee8-1c5a-4969-b340-03a52d6bb1bd</a>. Formatted as a Frictionless Data package.
FIG. 2 in The Brooklyn snake papyrus: why the enigmatic k could be a chameleon
FIG. 2. — Common chameleon (Chamaeleo chamaeleon (Linnaeus, 1758)) tongue protrusion. Photo credit: Mehmetkrckrc (CC BY-SA 4.0). https://commons. wikimedia.org/wiki/File:Hunter_chameleon.jpg, last consultation on 22 November 2022.
FIG. 1 in The Brooklyn snake papyrus: why the enigmatic k could be a chameleon
FIG. 1. — Common chameleon (Chamaeleo chamaeleon (Linnaeus, 1758)). Photo credit: mirecca (https://www.istockphoto.com).
Macroevolution of sexually selected weapons: weapon evolution in chameleons
Abstract The evolution of sexually selected traits is a major topic in evolutionary biology. However, large-scale evolutionary patterns in these traits remain understudied, especially those traits used in male–male competition (weapons sensu lato). Here, we analyze weapon evolution in chamaeleonid lizards, both within and between the sexes. Chameleons are an outstanding model system because of their morphological diversity (including 11 weapon types among ~220 species) and a large-scale time-calibrated phylogeny. We analyze these 11 traits among 165 species using phylogenetic methods, addressing many questions for the first time in any group. We find that all 11 weapons have each evolved multiple times and that weapon origins are generally more frequent than their losses. We find that almost all weapons have each persisted for &gt;30 million years (and some for &gt;65 million years). Across chameleon phylogeny, we identify both hotspots for weapon evolution (up to 10 types present per species) and coldspots (all weapons absent, many through loss). These hotspots are significantly associated with larger male body size, but are only weakly related to sexual-size dimorphism. We also find that weapon evolution is strongly correlated between males and females. Overall, these results provide a baseline for understanding large-scale patterns of weapon evolution within clades.
Feats of supercontractile strength: Functional convergence of supercontracting muscle properties among hyoid musculature in chameleons
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Macroevolution of sexually selected weapons: weapon evolution in chameleons
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Chameleon biogeographic dispersal associated with extreme life history strategies
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Data from: Adaptation in the Anthropocene: How behavioural choice and colour change enables chameleon prawns to camouflage on non‐native seaweeds
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- *4K* Video - Jackson's Chameleon (Chameleo jacksonii) High Definition 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 major brain subdivisions of the Flying Dragon lizard. 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> <p> </p>
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