Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
13,017
datasets available to search
ShareScore release 0.9.0
Dataset results
13,017 results for “Positionning”
FIGURE 7 in Osteology of Hemigrammocypris neglecta (Teleostei: Cypriniformes) with comments on its systematic position
FIGURE 7. Weberian apparatus. (A) and (B) Hemigrammocypris neglecta, TKPM-P 26051, 36.7 mm SL; lateral (A) and ventral (B) views. Cartilage is cross-hatched. C, claustrum; CE, centrum; I, intercalarium; IOS, inner arm of the os suspensorium; L, lateral process of the vertebral centrum; NA, neural arch; NS, neural spine; OOS, outer arm of os suspensorium; R, rib of vertebral centrum; S, scaphium; SN, supraneural; T, tripus. Scale bars represent 1 mm.
FIGURE 3 in Osteology of Hemigrammocypris neglecta (Teleostei: Cypriniformes) with comments on its systematic position
FIGURE 3. Upper (A–B: lateral views) and lower jaws (C-1, 2: lateral and medial views), and kinethmoids. (A) and (C) Hemigrammocypris neglecta, KUN-P 43646, 32.5 mm SL. (B) Aphyocypris chinensis, KUN-P 43660, 50.1 mm SL. Cartilage is cross-hatched. AN, anguloarticular; CM, coronomeckelian; DEN, dentary; KE, kinethmoid; MC, Meckel's cartilage; MEP, maxilla medial process; MX, maxilla; PMX, premaxilla; RA, retroarticular. Scale bars represent 1 mm.
FIGURE 10 in Osteology of Hemigrammocypris neglecta (Teleostei: Cypriniformes) with comments on its systematic position
FIGURE 10. Dorsal (A–B: lateral views) and anal fin supports (C–F: lateral views). (A) and (C) Hemigrammocypris neglecta, TKPM-P 26051, 30.4 mm SL. (B) and (D) Aphyocypris kikuchii, TKPM-P 26050, 58.1 mm SL. (E) Metzia lineata, KUN-P 40610, 63.6 mm SL. (F) M. mesembrinum: TKPM-P 26049, 77.7 mm SL. Cartilage is cross-hatched. DR, distal radial; FIR, fin ray; MR, middle radial; PRA, proximal radial; ST, stay. Scale bars represent 1 mm.
FIGURE 9 in Osteology of Hemigrammocypris neglecta (Teleostei: Cypriniformes) with comments on its systematic position
FIGURE 9. Pectoral girdles (A–B: medial views) and Pelvic girdle (C: lateral view). (A) Hemigrammocypris neglecta, KUN-P 43642, 32.4 mm SL. (B) Aphyocypris kikuchii, TKPM-P 26050, 58.1 mm SL. (C) H. neglecta, TKPM-P 26051, 36.7 mm SL. Cartilage is cross-hatched. CL, cleithrum; CO, coracoid; MS, mesocoracoid; PCL, postcleithrum; PER, pectoral radial; PLB, pelvic bone; PR, pelvic radial; PS, pelvic splint; PT, posttemporal; SC, scapula; SCL, supracleithrum. Scale bars represent 1 mm.
FIGURE 6 in Osteology of Hemigrammocypris neglecta (Teleostei: Cypriniformes) with comments on its systematic position
FIGURE 6. Branchial arches (A: dorsal view) and pharyngeal teeth (B–C: lateral view). (A) Hemigrammocypris neglecta, KUN-P 43644, 24.4 mm SL. (B) H. neglecta, TKPM-P 26051, 36.7 mm SL. (C) Aphyocypris kikuchii, TKPM-P 26050, 58.1 mm SL. Cartilage is cross-hatched. BB, basibranchial; BH, basihyal; CB, ceratobranchial; EB, epibranchial; HB, hypobranchial; PB, pharyngobranchial; PC, posterior copula cartilage. Scale bars represent 1 mm.
Data from: Whole genome sequencing of two North American Drosophila melanogaster populations reveals genetic differentiation and positive selection
The prevailing demographic model for Drosophila melanogaster suggests that the colonization of North America occurred very recently from a subset of European flies that rapidly expanded across the continent. This model implies a sudden population growth and range expansion consistent with very low or no population subdivision. As flies adapt to new environments, local adaptation events may be expected. To describe demographic and selective events during North American colonization, we have generated a data set of 35 individual whole-genome sequences from inbred lines of D. melanogaster from a west coast US population (Winters, California, USA) and compared them with a public genome data set from Raleigh (Raleigh, North Carolina, USA). We analysed nuclear and mitochondrial genomes and described levels of variation and divergence within and between these two North American D. melanogaster populations. Both populations exhibit negative values of Tajima's D across the genome, a common signature of demographic expansion. We also detected a low but significant level of genome-wide differentiation between the two populations, as well as multiple allele surfing events, which can be the result of gene drift in local subpopulations on the edge of an expansion wave. In contrast to this genome-wide pattern, we uncovered a 50-kilobase segment in chromosome arm 3L that showed all the hallmarks of a soft selective sweep in both populations. A comparison of allele frequencies within this divergent region among six populations from three continents allowed us to cluster these populations in two differentiated groups, providing evidence for the action of natural selection on a global scale.
FIGURE 1. Diagrams showing positions used for morphometric measurements. A, carapace B in A revision of the shovel-nosed lobsters of the genus Thenus (Crustacea: Decapoda: Scyllaridae), with descriptions of three new species
FIGURE 1. Diagrams showing positions used for morphometric measurements. A, carapace B, first and second antennal segments; C, pereiopods 1–3; D, first abdominal segment; E, sixth abdominal segment and telson.
FIGURE 1 in Paraphyly of Chinese Amolops (Anura, Ranidae) and phylogenetic position of the rare Chinese frog, Amolops tormotus
FIGURE 1. Bayesian inference tree derived from partial DNA sequences of the mitochondrial genes 12S and 16S. Numbers above branches are bootstrap support for maximum parsimony (1000 replicates) / maximum likelihood (10 replicates) analyses (>50 retained), and numbers below branches indicate Bayesian posterior probabilities (>90% retained). Species new to this study are indicated in bold. Species groups of Chinese Amolops from Fei et al. (2005) are indicated.
FIGURE 4 in Phylogenetic position and taxonomy of the enigmatic Orobanche krylowii (Orobanchaceae), a predominatly Asian species newly found in Albania (SE Europe)
FIGURE 4. Distribution of Orobanche krylowii based on the examined herbarium material and photos (big dots) as well as literature data (small dots). The locality in Albania is marked with a triangle.
FIGURE 1 in Phylogenetic position and taxonomy of the enigmatic Orobanche krylowii (Orobanchaceae), a predominatly Asian species newly found in Albania (SE Europe)
FIGURE 1. Maximum likelihood tree of nuclear ITS sequences of Orobanche, using the genus Diphelypaea as outgroup. Some clades with more sequences per species and/or several closely related species are collapsed to aid legibility. Orobanche krylowii is indicated in bold larger font. Numbers above branches are maximum likelihood, those below maximum parsimony bootstrap support values above 60%.
FIGURE 2 in Taxonomic position and identity of Stemodia scoparioides (Gratiolae, Plantaginaceae)
FIGURE 2. Pollen grains of Stemodia scoparioides. A. Equatorial view. B. Detail of the exine (A–B from Cowan et al. 4196, CTES). Scale bar = 10 µm.
FIGURE 1. Stemodia scoparioides. A. Plant. B in Taxonomic position and identity of Stemodia scoparioides (Gratiolae, Plantaginaceae)
FIGURE 1. Stemodia scoparioides. A. Plant. B. Detail of a stem node. C-D. Detail of leaf margin. E. Flower. F. Detail of sepal. G. Detail of node with immature fruits. H. Gynoecium. I. Corolla (inner view). J. Short anther. K. Large anther. L. Fruit (A-L from Cowan et al. 4185B, CTES; illustrated by Mirtha L. Gómez).
FIGURES 10–19 in Syvertsenia iberica (Cymatosiraceae): a new estuarine diatom genus characterized by the position of its process
FIGURES 10–19. Syvertsenia iberica. SEM images from the holotype sample (GS1) from Guadiana Estuary, Spain. Fig. 10: General view of the interior of the process valve. Note the tubular process (white arrow) and the presence of two linearly opposed ocelluli. Fig. 11: Close up to the valve internal view. Fig. 12: Close up of the middle part of the valve. Note the areolae occlusions, tubular process (black arrowhead) and mantle expansion with an areolae (white arrow). Fig. 13: Close up of the tubular process and areolae in the mantle expansion. Fig 14: Close up to the marginal spines. Fig. 15: Close up to the valve face areolae, which present an approximated linear and equidistant distribution. Figs 16, 17: Close up to the ocellulus, external (black arrowhead, Fig. 16) and internal (white arrow, Fig. 16) showing the presence of porelli (note the presence of spines in an external view). Figs 18, 19: Close up to the opposite apex ocellulus external view, note the presence of spines within ocellulus (black arrowhead, Fig. 18). Fig. 10: Scale bar = 10 µm. Fig. 11: Scale bar = 5 µm. Figs 12, 15 and 19: Scale bar = 500 nm. Fig. 13: Scale bar = 250 nm. Fig. 14: Scale bar = 200 nm. Fig. 16: Scale bar = 2 µm. Figs 17, 18: Scale bar = 1 µm.
FIGURES 2–9 in Syvertsenia iberica (Cymatosiraceae): a new estuarine diatom genus characterized by the position of its process
FIGURES 2–9. Syvertsenia iberica. LM images. Figs 3–9: Specimens from the holotype slide. Figs 6, 7: Holotype specimen photographed in various techniques, note the presence of the tubular process on a mantle (arrow) Figs 8, 9: Same specimen photographed in various techniques. Figs 4–6 and 8: Phase contrast. Figs 7 and 9: Differential Interference Contrast. All scale bars = 10 µm.
FIGURE 1 in Syvertsenia iberica (Cymatosiraceae): a new estuarine diatom genus characterized by the position of its process
FIGURE 1. Study area: (A) Location in Iberia Peninsula, (B) Location in the lower area of the Guadiana Estuary and (C) Schematic representation of the sampling transect (elevation relative to the mean sea-level). Illustrations of Sarcocornia perennis (Miller) A. J. Scott (1977: 367) & Halimione portulacoides (L.) Aellen (1938: 126) by Tracey (2010) and Spartina maritima (Curtis) Fernald (1916: 180) by Saxby (2010).
FIGURE 4 in On the taxonomic position of Panicum scabridum (Poaceae, Panicoideae, Paspaleae)
FIGURE 4. Scanning electron micrographs of the upper anthecia of Coleataenia scabrida. A. Apex of the upper lemma and palea with simple papillae. B. Apex of the upper lemma with simple papillae. Zuloaga et al. 4384. Scale: 100 µm.
FIGURE 1 in On the taxonomic position of Panicum scabridum (Poaceae, Panicoideae, Paspaleae)
FIGURE 1. Strict consensus tree obtained in the parsimony analysis of the combined (ndhF + morphology) Panicoid matrix, including C. scabrida (see arrow). Bootstrap support levels are shown below branches.
FIGURE 3. Coleataenia scabrida. A. Habit. B. Ligular region. C. Spikelet, lateral view. D. Spikelet, ventral view. E. Spikelet, dorsal view. F. Upper anthecium, dorsal view. G. Upper anthecium, ventral view. H in On the taxonomic position of Panicum scabridum (Poaceae, Panicoideae, Paspaleae)
FIGURE 3. Coleataenia scabrida. A. Habit. B. Ligular region. C. Spikelet, lateral view. D. Spikelet, ventral view. E. Spikelet, dorsal view. F. Upper anthecium, dorsal view. G. Upper anthecium, ventral view. H. Upper palea, with lodicules and flower. I. Caryopsis, embryo view. J. Caryopsis, hilum view. Based on Zuloaga et al. 4384, V. Dudas, illustrator.
FIGURE 2 in On the taxonomic position of Panicum scabridum (Poaceae, Panicoideae, Paspaleae)
FIGURE 2. Strict consensus trees (only the Arthropogoninae subtribe is shown) obtained in parsimony analysis of the ndhf Panicoid matrix, including C. scabrida (see arrow). Bootstrap support levels are shown above branches. A. Analysis includes Triscenia ovina. B. Analysis excludes T. ovina.
FIGURE 5. Leaf anatomy. A–B in On the taxonomic position of Panicum scabridum (Poaceae, Panicoideae, Paspaleae)
FIGURE 5. Leaf anatomy. A–B, Coleataenia scabrida; A, transverse leaf section; B, abaxial epidermis. C, Coleataenia prionitis; transverse leaf section. A and C, inner mestome sheath with chloroplasts indicated by arrows. A, Zuloaga et al. 4384; B, Davidse 5444; C, reproduced from Zuloaga et al. (1989). Scale: A, 25 µm; B, C, 50 µm.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
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.