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.
901
datasets available to search
ShareScore release 0.9.0
Dataset results
901 results for “Amazon Basin”
FIGURE 23 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 23: Skeleton of Plesiotrygon cf. iwamae from radiograph (MUSM 39977, juvenile male, 1096 mm TL, 221 mm DL, 211 mm DW). Tail posterior to caudal stings not depicted in radiograph.
Figure 20 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
Figure 20 (specimens depicted in B-E come from the same locality in Rio Pará). Enlarged dorsal tail spines, with very wide bases and high, acute crowns arranged in a single irregular row, are present in the vast majority of specimens of P. iwamae, but some specimens (MZUSP 59897, 108706, 108707, 108767, 108773) lack them altogether or present smaller, more scattered spines with few larger spines interspersed (Figures 19E, F, 23, 24C). Denticle morphology is similar to P. nana (Figure 22).
FIGURE 20 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 20: Left posterolateral disc region in Plesiotrygon iwamae, showing some of the variation in dorsal disc color present in specimens examined. A) MZUSP 59896 (Rio Solimões, 470 mm DL, 460 mm DW). B) MZUSP 108706 (Rio Pará, 350 mm DL, 355 mm DW). C) MZUSP 108771 (Rio Pará, 292 mm DL, 294 mm DW). D) MZUSP 108772 (Rio Pará, 298 mm DL, 300 mm DW). E) 108776 (Rio Pará, 396 mm DL, 398 mm DW). F) MZUSP 108775 (Rio Pará, 452 mm DL, 442 mm DW).
FIGURE 3 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 3: Paratype of Plesiotrygon nana sp. nov., in dorsal (A) and ventral (B) views (MUSM 40243, preadult male, 671 mm TL, 174 mm DL, 170 mm DW, Río Amazonas, near Tamshiyacu, Peru).
FIGURE 8 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 8: Nasal curtain and mouth (closed) of holotype of Plesiotrygon nana sp. nov., showing triangular mark on nasal curtain formed by junction of suborbital and prenasal canals of ventral lateral-line system, tubular narial grooves, and labial folds (MUSM 20328, 243 mm DL, 247 mm DW). Distance between nostrils = 1.5 cm.
FIGURE 4 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 4: Morphological details of paratype of Plesiotrygon nana sp. nov. (MUSM 40243, preadult male, 671 mm TL, 174 mm DL, 170 mm DW, Río Amazonas, near Tamshiyacu, Peru). A) Dorsal view of anterior disc and head region. B) Nasoral region. C) Dorsal view of base of tail and pelvic fins. D) Dorsal view of claspers and pelvic fins. E) Ventral view of pelvic fins and claspers. F) Dorsal view of base of tail and tail region at caudal stings. G) Lateral view of tail at caudal sting region, showing ventral tail-fold. Scale bar in A, C, E, F, G = 2 cm; B, D = 1 cm.
FIGURE 13 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 13: Radiograph of skeleton of holotype of Plesiotrygon nana sp. nov. (MUSM 20328, adult male, 1024 mm TL, 243 mm DL, 247 mm DW). Distal tail filament not shown.
FIGURE 12 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 12: Ventral lateral-line system in species of Plesiotrygon. A) P. nana sp. nov. (based on female paratype, MZUSP 108777, 81 mm DL, 72 mm DW). B) P. iwamae (MZUSP 59899, 325 mm DL, 310 mm DW). Abbreviations: AST, anterior subpleural tubules; HYC, hyomandibular canal; IOC, infraorbital canal; IOL, infraorbital loop; JUG, jugular canal; PNS, prenasal canal; PST, posterior subpleural tubule; SOC, supraorbital canal; SOL, suborbital loop; SPL, subpleural loop. Scale bar = 3 cm.
FIGURE 17 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 17: Paratype of Plesiotrygon iwamae in dorsal (A) and ventral (B) views (FMNH 94500, adult female, 565 mm DL, Río Napo, Ecuador).
FIGURE 2 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 2: Morphological details of holotype of Plesiotrygon nana sp. nov. (MUSM 20328, adult male, 1024 mm TL, 243 mm DL, 247 mm DW, from Río Pachitea, tributary of Río Ucayali, near Puerto Inca, Peru). A) Dorsal view of anterior disc and head region. B) Nasoral region. C) Dorsal view of base of tail and pelvic fins. D) Ventral view of pelvic fins and clasper. E) Dorsal view of tail region at caudal stings (removed). F) Lateral view of tail at region of caudal stings (removed), showing ventral tail-fold. Scale bar in A, C-F = 2 cm; B = 1 cm.
FIGURE 19 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 19: Morphological details of Plesiotrygon iwamae. A) Dorsal view of anterior disc and head region (MZUSP 59896). B) Nasoral region (MZUSP 59898). C) Dorsal view of base of tail and pelvic fins (MZUSP 108773). D) Ventral view of pelvic fins (MZUSP 59897). E) Dorsal view of base of tail and tail region at caudal stings (MZUSP 59898). F) Lateral view of tail at caudal sting region, showing ventral tail-fold (MZUSP 59898). Scale bar = 5 cm.
FIGURE 1 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 1: Holotype of Plesiotrygon nana sp. nov., in dorsal (A) and ventral (B) views (MUSM 20328, adult male, 1024 mm TL, 243 mm DL, 247 mm DW, from Río Pachitea, tributary of Río Ucayali, near Puerto Inca, Peru).
FIGURE 18 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 18: Specimen of Plesiotrygon iwamae (MZUSP 59898, 432 mm DL, 425 mm DW) from the Rio Jutaí (Amazonas state, Brazil), in dorsal (A) and ventral (B) views.
FIGURE 11 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 11: Dermal denticles and larger spines in holotype (left column) and male paratype (right column) of Plesiotrygon nana sp. nov. A, B) Enlarged spine from dorsal tail base. C, D) Scale bars: A, B = 1 mm; C, D = 0.5 mm; E, F = 0.1 mm.
FIGURE 15 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 15: Skeletal aspects of holotype of Plesiotrygon nana sp. nov. (MUSM 20328, adult male, 1024 mm TL, 243 mm DL, 247 mm DW). A) Articulation between pectoral basal elements and shoulder girdle, showing pectoral radials and lateral aspect of scapulocoracoid. B) Detail of propterygium, neurocranium, and mandibular and hyoid arches in ventral view. Abbreviations: AC, angular cartilage; AOC, antorbital cartilage; HYO, hyomandibula; MC, Meckel's cartilage; MES, mesopterygium; MET, metapterygium; NA, nasal aperture; POP, postorbital process; PQ, palatoquadrate; PR, pectoral radials; PRO, propterygium; SCP, scapulocoracoid.
FIGURE 14 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 14: Details of the skeleton and dermal covering in holotype of Plesiotrygon nana sp. nov., from radiograph (MUSM 20328, adult male, 1024 mm TL, 243 mm DL, 247 mm DW). A) Splanchnocranium and scapular region. B) Angular cartilage magnified. C) Base of tail region showing arrangement of dorsal spines and denticles. For an anatomical guide, refer to Figure 15. Scale bar = 1 cm.
FIGURE 16 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 16: Distribution of specimens of Plesiotrygon examined in this study (see text for details). Square with star: holotype of P. nana (Río Pachitea, tributary of Río Ucayali, near Puerto Inca, Peru). Open square: paratypes of P. nana (representing two separate, but proximal, localities). Closed square: specimen collected and photographed from Rio Solimões in 1996. Closed circle with star: holotype of P. iwamae (Rio Solimões, above Tefé). Open circles: paratypes of P. iwamae. Closed circles: non-type specimens of P. iwamae. Base map by M.J. Weitzman.
FIGURE 10 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 10: Small, free-living specimen of Plesiotrygon nana sp. nov. MZUSP 57642, juvenile or preadult female 912 mm TL, 124 mm DL, 118 mm DW. Characters that allow it to be identified as P. nana include its dorsal color pattern, dark purplish-brown caudal whip, proportionally smaller spiracles and nasoral region, and ventral lateral-line canals. Photo courtesy M. Toledo-Piza.
FIGURE 6 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 6: Paratype of Plesiotrygon nana sp. nov., in dorsal (A) and ventral (B) views (MZUSP 108777, juvenile female, 463 mm TL, 81 mm DL, 72 mm DW, Río Itaya, tributary of Río Nanay, near Iquitos, Peru).
FIGURE 9 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 9: Dorsal (A, B) and external (C) aspect of clasper of holotype of Plesiotrygon nana sp. nov. (MUSM 20328, adult male, 243 mm DL, 247 mm DW). Abbreviations: CG, clasper groove; DPS, dorsal pseudosiphon; VPS, ventral pseudosiphon (mostly concealed in dorsal view). Scale bar = 1 cm.
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.