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68 results for “shell evolution”
Data from: Correlation of shell phenotype and local environment suggests a role for natural selection in the evolution of Placostylus snails
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Data from: Brachiopod shell thickness links environment and evolution
While it is well established that the shapes and sizes of shells are strongly phylogenetically controlled, little is known about the phylogenetic constraints on shell thickness. Yet, shell thickness is likely to be sensitive to environmental fluctuations and has the potential to illuminate environmental perturbations through deep time. Here we systematically quantify the thickness of the anterior brachiopod shell which protects the filtration chamber and is thus considered functionally homologous across higher taxa of brachiopods. Our data comes from 66 genera and ten different orders and shows well-defined upper and lower boundaries of anterior shell thickness. For Ordovician and Silurian brachiopods we find significant order-level differences and a trend of increasing shell thickness with water depth. Modern (Cenozoic) brachiopods, by comparison, fall into the lower half of observed shell thicknesses. Among Ordovician – Silurian brachiopods, older stocks commonly have thicker shells, and thick-shelled taxa contributed more prominently to the Great Ordovician Biodiversification, but suffered more severely during the Late Ordovician Mass Extinction. Our data point at a significant reduction in maximum and minimum shell thickness following the Late Ordovician mass extinction. This points towards stronger selection pressure for energy-efficient shell secretion during times of crisis.
Supplementary material 2 from: Salvador RB, Breure ASH (2024) Pilsbrylia, a dextral-shelled door snail from South America (Gastropoda, Clausiliidae). Zoosystematics and Evolution 100(1): 9-14. https://doi.org/10.3897/zse.100.110105
Bayesian inference tree of the Clausilioidea showing the complete set of terminal taxa
Figure 1 from: Salvador RB, Breure ASH (2024) Pilsbrylia, a dextral-shelled door snail from South America (Gastropoda, Clausiliidae). Zoosystematics and Evolution 100(1): 9-14. https://doi.org/10.3897/zse.100.110105
Figure 1 Shells of the three known species of Pilsbrylia in apertural, lateral, and dorsal views. A.P. paradoxa, holotype MLP-Ma 11337 (Museo de La Plata, Argentina); B.P. hyltonae, lectotype MLP-Ma 3991-1; C.P. dalli, holotype MZSP 133161 (Museu de Zoologia da Universidade de São Paulo, Brazil). Scale bar: 5 mm.
Figure 2 from: Salvador RB, Breure ASH (2024) Pilsbrylia, a dextral-shelled door snail from South America (Gastropoda, Clausiliidae). Zoosystematics and Evolution 100(1): 9-14. https://doi.org/10.3897/zse.100.110105
Figure 2 Bayesian inference tree of the Clausilioidea. The crown group is collapsed to facilitate visualization (see Suppl. material 2 for a full view). Posterior probabilities are shown on nodes. Scale bar is substitutions per site.
Data from: Trends in the sand: directional evolution in the shell shape of recessing scallops (Bivalvia: Pectinidae)
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Data from: Brachiopod shell thickness links environment and evolution
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Figure 4 in A dark shell hiding great variability: a molecular insight into the evolution and conservation of melanic Daphnia populations in the Alps
Figure 4. Unrooted haplotype networks of European Daphnia pulicaria haplotypes showing disconnections at the 97% parsimony threshold. Different patterns identify the main haplogroups considered in this study (see Fig. 1 for geographical distributions of haplogroups). Circles indicate distinct haplotypes (size proportional to the number of specimens sharing the same haplotype). Bold outlines indicate haplotypes found in our melanic alpine populations. The minimum number of mutational steps required to connect all haplotypes in a single network is also given (dashed double-arrowed lines). Alpine haplotypes are coded as in Fig. 3. Black dots indicate missing (unsampled/extinct) haplotypes.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.