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.
222
datasets available to search
ShareScore release 0.9.0
Dataset results
222 results for “ancient lake”
FIGURES 166–218 in Observations on Hippodonta (Bacillariophyceae) in selected ancient lakes
FIGURES 166–218: LM micrographs. Figs 166–179. Hippodonta subrostrata (type material). Figs 180–191. Hippodonta rostratoides (type material). Figs 192–200. Hippodonta affinis (type material). Figs 201–212. Hippodonta exigua (type material). Figs 213–218. Hippodonta humboldtiana (type material). Scale bar = 10 µm.
FIGURES 64–68 in Observations on Hippodonta (Bacillariophyceae) in selected ancient lakes
FIGURES 64–68: SEM micrographs. Figs 64–66. Hippodonta latelanceolata (type material). Fig. 64. External view of entire valve. Terminal pores of raphe deflected towards secondary valve side. Fig. 65. Close-up of central area of valve in Fig. 64. Central raphe endings with pronounced teardrop-shaped depressions. Fig. 66. External view of valve depicting complete mantle. Pronounced hyaline area present throughout valve mantle. Fig. 67. Hippodonta lueneburgensis. External view of complete frustule showing broad unornamented girdle. Fig. 68. Hippodonta costulatiformis var. costulatiformis. External view of complete frustule showing prominent hyaline area present on valve mantle and broad, unornamented girdle. Scale bars in Figs 64, 66, 68 = 5 µm; Fig. 67 = 10 µm; Fig. 65 = 2 µm.
FIGURES 102–165 in Observations on Hippodonta (Bacillariophyceae) in selected ancient lakes
FIGURES 102–165: LM micrographs. Figs 102–137. Hippodonta abunda (type material). Figs 138–155. Hippodonta microcostulata. Figs 156–165. Hippodonta media (type material). Scale bar = 10 µm.
FIGURES 226–271 in Observations on Hippodonta (Bacillariophyceae) in selected ancient lakes
FIGURES 226–271: LM micrographs. Figs 226–238. Hippodonta capitata. Figs 239–248. Hippodonta hungarica. Figs 249–271. Hippodonta linearis. Scale bar = 10 µm.
FIGURES 27–63 in Observations on Hippodonta (Bacillariophyceae) in selected ancient lakes
FIGURES 27–63: LM micrographs. Figs 27–44. Hippodonta latelanceolata (type material). Fig. 30. Complete frustule in girdle view. Figs 45–63. Hippodonta costulatiformis var. costulatiformis. Fig. 63. Complete frustule in girdle view. Scale bar = 10 µm.
FIGURES 219–225 in Observations on Hippodonta (Bacillariophyceae) in selected ancient lakes
FIGURES 219–225: SEM micrographs. Figs 219–222. Hippodonta abunda (type material). Fig. 219. External view of entire valve. Terminal pores of raphe are simple linear depressions. Fig. 220. External view of complete frustule showing broad, unornamented girdle. Fig. 221. Internal view of entire valve. Striae positioned in shallow depressions, helictoglossae in line with raphe slits. Fig. 222. Close-up of one half of valve, internal view. Lineolae covered by quite prominent elliptical volae. Fig. 223. Hippodonta rostratoides (type material). External view of entire valve. Lineolae quite prominent. Terminal pores of raphe slightly deflected towards one valve side. Fig. 224. Hippodonta affinis (type material). External view of entire valve. Lineolae narrow but long. Terminal pores of raphe simple linear. Fig. 225. Hippodonta exigua (type material). External view of entire valve. Lineolae weakly pronounced, short. Terminal pores of raphe slightly deflected towards one valve side. Scale bars in Figs 219, 223, 224 = 5 µm; Fig. 220 = 2 µm; Fig. 221 = 6 µm; Fig. 222 = 3 µm; Fig. 225 = 4 µm.
FIGURES 96–101 in Observations on Hippodonta (Bacillariophyceae) in selected ancient lakes
FIGURES 96–101: SEM micrographs. Figs 96, 97. Hippodonta costulatiformis var. densistriata (type material). Fig. 96. External view of complete frustule showing narrow hyaline area present on valve mantle and the unornamented girdle. Fig. 97. Internal view of entire valve; striae positioned in shallow ridge depressions; interstriae strongly pronounced; helictoglossae in line with raphe slits. Figs 98–101. Hippodonta naviculiformis (type material). Figs 98, 100. External view of entire valve. Terminal pores of raphe deflected towards one valve side. Fig. 99. Internal view of entire valve. Lineolae positioned in shallow elliptical depressions. Central raphe endings simple linear and distantly positioned. Fig. 101. External view of broken frustule showing girdle unornamented. Scale bars in Fig. 96 = 2 µm; Fig. 97 = 5 µm; Figs 98–101 = 2 µm.
FIGURES 365–392 in Observations on Hippodonta (Bacillariophyceae) in selected ancient lakes
FIGURES 365–392: LM micrographs. Figs 365–372. Hippodonta pulchra (type material). Figs 366, 367. Images of same valve at different focus. Fig. 372. Complete frustule in girdle view. Figs 373–376. Hippodonta costuloides. Fig. 373. Image of broken initial cell. Figs 377–392. Hippodonta intermedia. Fig. 380. Complete frustule in girdle view. Scale bar = 10 µm.
FIGURES 308–364 in Observations on Hippodonta (Bacillariophyceae) in selected ancient lakes
FIGURES 308–364: LM micrographs. Figs 308–328. Hippodonta avittatiformis (type material). Figs 327, 328. Images of complete frustules in girdle view. Figs 329–342. Hippodonta angustata (type material). Figs 343–349. Hippodonta cocquytiae (type material). Figs 350–353. Hippodonta conspicua (type material). Figs 354–364. Hippodonta minuta (type material). Fig. 354. Complete frustule in girdle view. Scale bar = 10 µm.
FIGURES 547–555 in Observations on Hippodonta (Bacillariophyceae) in selected ancient lakes
FIGURES 547–555: SEM micrographs. Figs 547, 548. Hippodonta subelegans. Fig. 547. External view of entire valve. Terminal pores of raphe are simple linear. Fig. 548. Detail of central area. Lineolae quite narrow and long, bone-shaped. Figs 549, 550. Hippodonta acuta (type material). Fig. 549. Internal valve view. Linear raphe slit distally terminated by semi-elliptical helictoglossa, positioned just before terminal area. Fig. 550. Detail of internal mid-valve. Striae positioned in prominent depressions. Lineolae covered by prominent, broadly elliptical volae. Figs 551–554. Hippodonta microcostulata. Fig. 551. External view of entire valve. Terminal pores of raphe distinct, advancing strongly into terminal area. Figs 552, 554. External view of two complete frustules, showing girdle unornamented. Fig. 553. Detail of mid-valve in fig. 552. Lineolae prominent and elliptical, longer near raphe and shorter towards valve mantle. Fig. 555. Hippodonta communis (type material). External view of complete frustule. Lineolae prominent and long, simple linear. Girdle quite broad and unornamented. Scale bars in Figs 547, 549, 554 = 5 µm; Figs 548, 550, 553 = 1 µm; Figs 551, 552 = 2 µm; Fig. 555 = 10 µm.
FIGURES 499–546 in Observations on Hippodonta (Bacillariophyceae) in selected ancient lakes
FIGURES 499–546: LM micrographs. Figs 499–519. Hippodonta microcostulata. Figs 520–525. Hippodonta kornevae. Fig. 525. Complete frustule in girdle view. Figs 526–534. Hippodonta certa (type material). Fig. 533. Complete frustule in girdle view. Figs 535–543. Hippodonta communis (type material). Figs 544–546. Hippodonta acus. Scale bar = 10 µm.
FIGURES 443–498 in Observations on Hippodonta (Bacillariophyceae) in selected ancient lakes
FIGURES 443–498: LM micrographs. Figs 443–469. Hippodonta subelegans. Figs 470–481. Hippodonta acuta (type material). Figs 482–498. Hippodonta microcostulata. Scale bar = 10 µm.
Species divergence and repeated ancient hybridization in a Sulawesian lake system
<p><span><span><span><span><span><span><span><span><span><span>An increasing volume of empirical studies demonstrated that hybridization between distant lineages may have promoted speciation in various taxa. However, the timing, extent, and direction of introgressive hybridization remain unknown in many cases. Here, we report a possible case in which repeated hybridization promoted divergence of <i>Oryzias</i> ricefishes (Adrianichthyidae) on Sulawesi, an island of Wallacea. Four <i>Oryzias</i> species are endemic to the Malili Lake system in central Sulawesi, which is composed of five tectonic lakes; of these, one lake is inhabited by two species. Morphological and population genomic analyses of genome-wide single-nucleotide polymorphisms revealed that these two sympatric species are phylogenetically sister to but substantially reproductively isolated from each other. Analyses of admixture and comparison of demographic models revealed that the two sympatric species experienced several substantial introgressions from outgroup populations that probably occurred soon after they had secondary contact with each other in the lake. However, the ratio of migrants from the outgroups was estimated to be different between the two species, which is consistent with the hypothesis that these introgressions aided their divergence or prevented them from forming a hybrid swarm. Repeated lake fragmentations and fusions may have promoted diversification of this freshwater fish species complex that is endemic to this ancient lake system.</span></span></span></span></span></span></span></span></span></span></p>
Data from: Evidence for sympatric speciation in a Wallacean ancient lake
Open the record for dataset details and reuse information.
Data from: Barcoding of ancient lake ostracods (Crustacea) reveals cryptic speciation with extremely low distances
Open the record for dataset details and reuse information.
Species divergence and repeated ancient hybridization in a Sulawesian lake system
Open the record for dataset details and reuse information.
Data from: Lake Tanganyika - a 'melting pot' of ancient and young cichlid lineages (Teleostei: Cichlidae)?
Open the record for dataset details and reuse information.
Gudgeon fish with and without genetically determined countershading coexist in heterogeneous littoral environments of an ancient lake
Open the record for dataset details and reuse information.
Resource partitioning is not coupled with assortative mating in sympatrically divergent ricefish in a Wallacean ancient lake
Open the record for dataset details and reuse information.
Figure 21 in Systematic revision of the freshwater snail Margarya Nevill, 1877 (Mollusca: Viviparidae) endemic to the ancient lakes of Yunnan, China, with description of new taxa
Figure 21. Comparison of the species of Tchangmargarya with respect to parameters H and W/H.
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.