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.
450
datasets available to search
ShareScore release 0.9.0
Dataset results
450 results for “hook”
Fig. 5 in Large onychites (cephalopod hooks) from the Upper Jurassic of the Boreal Realm
Fig. 5. Mega− (Me) and micro−onychites (retouched). From Statoil well 33/9−C27, depth 3187.7 m (Upper Jurassic). PMO 223.405.
Fig. 8 in Large onychites (cephalopod hooks) from the Upper Jurassic of the Boreal Realm
Fig. 8. Whorl expansion coefficients (b) for inner and outer spirals. Onychites quenstedti as figured by Engeser (1987: pl. 2: 5).
Fig. 9 in Large onychites (cephalopod hooks) from the Upper Jurassic of the Boreal Realm
Fig. 9. Functional morphology of a hook or claw in a logarithmic spiral shape, penetrating a surface. A, B. Thrusting action, pole proximal. The angle φ at the contact point and the direction of the force vector (arrow) are constant during penetration. C, D. Pulling action, pole distal.
Fig. 2 in Large onychites (cephalopod hooks) from the Upper Jurassic of the Boreal Realm
Fig. 2. Simplified stratigraphy of the upper part of the Agardhfjellet Formation in the Sassenfjorden area, Spitsbergen, with positions of mega−onychites. The Upper Volgian is highly condensed. Modified from Hammer et al. (2011).
Fig. 4 in Large onychites (cephalopod hooks) from the Upper Jurassic of the Boreal Realm
Fig. 4. Belemnoid mega− (Onychites quenstedti Engeser, 1987) and microonychites from the Agardhfjellet Formation (probably Oppdalsåta Member), Upper Jurassic, Spitsbergen. PMO 223.381. A. Photograph. B. Explanatory drawing. Micro−onychites marked as hooks (complete specimens), lines and dots (incomplete specimens). Density of micro−onychites in gray scale, computed using the kernel density method.
Fig. 3 in Large onychites (cephalopod hooks) from the Upper Jurassic of the Boreal Realm
Fig. 3. Belemnoid mega−onychites Onychites quenstedti Engeser, 1987 from Boreal localities. A. PMO 223.380, seep carbonate, earliest Late Volgian, Knorringfjellet, Spitsbergen; entire specimen. B. Close−up of shaft on PMO 223.380, showing rows of circular tubercles. C. PMO 223.378, latest Early Volgian, Janusfjellet, Spitsbergen. D. PMO 223.379, latest Early Volgian, Janusfjellet, Spitsbergen. E. PMO 223.382, Middle Volgian, Janusfjellet, Spitsbergen. F. PMO 210.229, latest Early or early Middle Volgian, well 7/4−1, North Sea. G. PMO 223.383, Late Jurassic, well 34/7−23A, North Sea. H. PMO 74149, Late Jurassic, Andøya, northern Norway.
Fig. 1 in Large onychites (cephalopod hooks) from the Upper Jurassic of the Boreal Realm
Fig. 1. Geological map of the Sassenfjorden area, central Spitsbergen. Sampling locality: 1, Janusfjellet; 2, Knorringfjellet. Redrawn from Dallmann et al. (2001).
FIGURE 7 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 7 | Correlation between total length and number of rays with hooks in males of Brycon orbignyanus. X axis: total length in cm. Y axis: number (n°) of anal fin rays that developed hooks.
FIGURE 4 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 4 | Anal fin of Brycon orbignyanus with hooks. b: base of the hook. fr: first ray. lr: last ray. s: hooks. sg: rays segment. sr: second ray. st: hook cusp. Scales: A and B. 1.0 cm; C and D. 200 µm; E. 100 µm.
FIGURE 5 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 5 | Phases of testes maturation in Brycon orbignyanus. A. Immature. B. Immature intersex. C. Regressing. D. Regenerating. E. Spawning Capable (primary male). F. Spawning Capable (secondary male). bv: blood vessels. cy: germ cell cysts. dge: discontinuous germinal epithelium. in: interstice. pg: primary growing oocyte. sg: spermatogonia. s: Sertoli cell. sz: sperm. tw: testis wall. va: vacuoles. Scales: A, C, D, E. 20 µm; B, F. 50 µm. Staining: Hematoxylin and Eosin.
FIGURE 3 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 3 | Anal fin of Brycon orbignyanus without hooks. ca: callosity. fb: first fork. fr: first ray. sg: rays segment. sr: second ray. tb: terminal bifurcation. Scales: A. 0.5 cm; B. 200 µm; C. 100 µm.
FIGURE 6 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 6 | Correlation between stages of the reproductive cycle and the number of rays with hooks in males of Brycon orbignyanus. X axis: Stages of the reproductive cycle, being, 0 – Immature specimens, 1 – Regressing, 2 – Regenerating specimens, 3 – Developing specimens, 4 – Spawning Capable specimens. Y axis: number (n°) of anal fin rays that developed hooks.
FIGURE 1 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 1 | Anal fins in Brycon orbignyanus. A. Specimen of B. orbignyanus. B. Anal fin regions. C. Rays (r). D. Anal fin rays. af: anal fin. bi: bifurcation of rays. ca: caudal region. cr: cranial region. fr: first ray. im: interradial membrane. me: medial region. sg: radius segment. Scales: A. 5 cm; B and D. 1 cm; C. 200 µm.
FIGURE 2 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 2 | Details regarding the fins of Brycon orbignyanus. A, C and E. Rays without hooks. B, D and F. Rays with hooks. b: base. fb: first fork. r: rays. rs: rays with hooks. s: hooks. sg: rays segment. st: hooks cusp. tb: terminal bifurcation. Scales: A and B. 1 cm; C and D. 200 µm; E. 100 µm; F. 50 µm.
Fig. 1 - Begonia veitchii Hook. f in The history of the Botanic Garden of Brera during the Restoration of the Austrian Empire and the early years of the Kingdom of Italy
Fig. 1 - Begonia veitchii Hook. f. (Begoniaceae) (Lemaire Ch. (redigÉ par), 1868 - L'illustration horticole, Gand, 15, tav. 553).
Linked collectors and determiners for: Two new species and a new combination in the genus Pauridiantha Hook. f. (Rubiaceae) from tropical Africa.
Natural history specimen data linked to collectors and determiners held within, "Two new species and a new combination in the genus Pauridiantha Hook. f. (Rubiaceae) from tropical Africa". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/9dfbe7ab-f1ae-49ff-af7b-14dff6879995">https://bionomia.net/dataset/9dfbe7ab-f1ae-49ff-af7b-14dff6879995</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/9dfbe7ab-f1ae-49ff-af7b-14dff6879995">https://gbif.org/dataset/9dfbe7ab-f1ae-49ff-af7b-14dff6879995</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: Partial redescriptions of three holothurians with " hook papillae " (Apodida Chiridotidae): Taeniogyrus japonicus (Marenzeller, 1882), T. dendyi (Mortensen 1925), Scoliorhapis theelii (Heding, 1928).
Natural history specimen data linked to collectors and determiners held within, "Partial redescriptions of three holothurians with " hook papillae " (Apodida Chiridotidae): Taeniogyrus japonicus (Marenzeller, 1882), T. dendyi (Mortensen 1925), Scoliorhapis theelii (Heding, 1928)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/653f12df-811e-4693-ac19-50f7b109d51a">https://bionomia.net/dataset/653f12df-811e-4693-ac19-50f7b109d51a</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/653f12df-811e-4693-ac19-50f7b109d51a">https://gbif.org/dataset/653f12df-811e-4693-ac19-50f7b109d51a</a>. Formatted as a Frictionless Data package.
Text-fig. 25. Scanning electron microscope (SEM) images of Appomattoxia minuta sp. nov. fruits and associated monocolpate pollen grains; Torres Vedras locality, Portugal. a–c) Lateral view of fruits (a, holotype) covered with hooked hairs showing the apical stigmatic area; d–g) Pollen grains from the fruits in (a) and (b) showing short monocolpate aperture, granular aperture membrane and microechinate tectum. Specimens, TV44-S136786 (holotype; a, d, e), TV44-S136787 (b, f, g), TV43-S105022 (c). Scale bars 300 Μm (a–c), 30 Μm (e), 6 Μm (d, f, g). in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community
Text-fig. 25. Scanning electron microscope (SEM) images of Appomattoxia minuta sp. nov. fruits and associated monocolpate pollen grains; Torres Vedras locality, Portugal. a–c) Lateral view of fruits (a, holotype) covered with hooked hairs showing the apical stigmatic area; d–g) Pollen grains from the fruits in (a) and (b) showing short monocolpate aperture, granular aperture membrane and microechinate tectum. Specimens, TV44-S136786 (holotype; a, d, e), TV44-S136787 (b, f, g), TV43-S105022 (c). Scale bars 300 Μm (a–c), 30 Μm (e), 6 Μm (d, f, g).
Text-fig. 26. Scanning electron microscope (SEM) images of fruits of Appofructus gen. nov. and associated pollen grains; Torres Vedras locality, Portugal. a, b) Appofructus nudus gen. et sp. nov., lateral views of fruits (holotype figured in a) showing the ribbed surface, the poorly defined apical stigmatic area and short stalk; c, d) Appofructus sp. lateral view of fruit showing the absence of hooked hairs, the apical stigmatic area, the short stalk and pollen grain from the fruit surface (d); e–g) Appofructus nudus gen. et sp. nov., individual monocolpate pollen grains (f, g) from the group of pollen grains on the stigmatic surface (e). Specimens, TV44-S148143 (holotype; a); TV44-S148007 (b), TV38-S174610 (c, d), TV44-S148141 (e, f), TV44-S136687 (g). Scale bars 300 Μm (a–c), 60 Μm (e), 6 Μm (d, f, g). in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community
Text-fig. 26. Scanning electron microscope (SEM) images of fruits of Appofructus gen. nov. and associated pollen grains; Torres Vedras locality, Portugal. a, b) Appofructus nudus gen. et sp. nov., lateral views of fruits (holotype figured in a) showing the ribbed surface, the poorly defined apical stigmatic area and short stalk; c, d) Appofructus sp. lateral view of fruit showing the absence of hooked hairs, the apical stigmatic area, the short stalk and pollen grain from the fruit surface (d); e–g) Appofructus nudus gen. et sp. nov., individual monocolpate pollen grains (f, g) from the group of pollen grains on the stigmatic surface (e). Specimens, TV44-S148143 (holotype; a); TV44-S148007 (b), TV38-S174610 (c, d), TV44-S148141 (e, f), TV44-S136687 (g). Scale bars 300 Μm (a–c), 60 Μm (e), 6 Μm (d, f, g).
Figure 12 in Developmental basis of limb homology in Pleurodiran turtles, and the identity of the hooked element in the chelonian tarsus
Figure 12. Abnormal morphologies observed during limb development in Phrynops hilarii. A, the arrows point to a condensation of centrale 3 that seems to be duplicated. B, the arrows point to three ossification nuclei representing the primary cartilages of the fibulare, intermedium, and centrale 4 in the proximal tarsal.
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.