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.
1,695
datasets available to search
ShareScore release 0.7.1
Dataset results
1,695 results for “Pleistocene”
Mid to late Pleistocene IODP Expedition 354 Bengal Fan 8⁰ North transect age models, sedimentation rate stack, magnetic susceptibility stack, and XRF data
<p>Mid to late Pleistocene age models for the International Ocean Discovery Program (IODP) Expedition 354 8⁰ North drilling transect. Stacked records of sedimentation rates and magnetic susceptibility. U-channel XRF scans of calcareous clay sediments at Site U1452.</p> <p> </p> <p><strong>Abstract:</strong></p> <p>We investigate chronology and age uncertainty for the middle to upper Pleistocene lower Bengal Fan using a novel age-depth modeling approach that factors litho-, magneto-, bio-, cyclo-, and seismic stratigraphic constraints, based on results from the International Ocean Discovery Program Expedition 354 Bengal Fan and analysis of the GeoB97-020/027 seismic line. The initial chronostratigraphic framework is established using regionally extensive hemipelagic sediment units and only age-depth models of fan deposits that respect the superposition of channel-levee systems between sites are accepted. In doing so, we reconstruct signals of regional sediment accumulation rate and lithogenic sediment input through the perspective of a two-dimensional ~320 km transect at 8⁰ N that are consistent with more distal and more ambiguous regional records. This chronology allows us to discuss the depositional history of the middle to upper Pleistocene lower Bengal Fan within the context of sea level, climate, and tectonic controls. We hypothesize, based on the timing of accumulation rate changes, that progradation and intensification of the Bengal Fan’s channel-levee system at 8⁰ N was largely driven by increases in sea level amplitude during this time. However, it is also possible this progradation was influenced by changes in Pleistocene climate and increased Himalayan erosion rates, driving greater sediment flux to the fan.</p> <p> </p>
Figure 4 in Chromosomal separation of difficult species of Copris Geoffroy, 1762 and Onthophagus Latreille, 1802 (Coleoptera, Scarabaeidae), with discussion of O. massai Baraud as a British Pleistocene fossil
Figure 4. Elytral sculpture of Onthophagus fracticornis (a, b) and O. massai (c, d), to show the prominent presetal granules of the interstices in O. fracticornis (white-bordered black arrow) and the prominent perisetal punctures in O. massai (white arrow). a, modern, Šar Planina, Macedonia; b, Bronze Age, Wilsford, Wiltshire, England, age about 4000 years; c, modern, Parco dei Nebrodi, Sicily; d, Last Interglacial, Trafalgar Square, London, age about 120,000 years.
Figure 3 in Chromosomal separation of difficult species of Copris Geoffroy, 1762 and Onthophagus Latreille, 1802 (Coleoptera, Scarabaeidae), with discussion of O. massai Baraud as a British Pleistocene fossil
Figure 3. Mitotic chromosomes of Onthophagus fracticornis (a – l) and O. massai (m, n), arranged as karyotypes. a, c, e, g, i, k, m, plain, b, d, f, h, j, l, n, the same nuclei C-banded. a, b, Spain; c, d, England; e, f, Macedonia, Šar Planina; g, h, Macedonia, Mavrovo National Park, with one B-chromosome and autosome 5 heterozygous for a pericentric inversion; i, j, Czech Republic; k, l, Italy; m, n, Sicily, Piano Zucchi.
Figure 2 in Chromosomal separation of difficult species of Copris Geoffroy, 1762 and Onthophagus Latreille, 1802 (Coleoptera, Scarabaeidae), with discussion of O. massai Baraud as a British Pleistocene fossil
Figure 2. Mitotic chromosomes of Copris hispanus hispanus (a, b) and C. h. cavolinii (c, d) arranged as karyotypes. a, c, plain, b, d, the same nuclei C-banded.
FIG. 3 in The saber-toothed cat Homotherium latidens (Owen, 1846) from the lower Pleistocene locality Dafnero, Western Macedonia, Greece
FIG. 3. — Comparison of the crania of Homotherium latidens (Owen, 1846): A, DFN3-152 from Dafnero-3; B, MNHN.F.PET2000 (cast); C, Perrier (France), Senèze (France), FSL-210 991 (cast); D, IN-I 929 from Incarcal (Spain). Views: 1, lateral; 2, dorsal; 3, ventral. Scale bar: c. 10 cm.
FIG. 5 in The saber-toothed cat Homotherium latidens (Owen, 1846) from the lower Pleistocene locality Dafnero, Western Macedonia, Greece
FIG. 5. — Box-plot diagram comparing the upper carnassial length of Homotherium Fabrini, 1890 and Megantereon Croizet & Jobert, 1828 from various European localities. Data sources as in Fig. 3.
FIG. 1 in The saber-toothed cat Homotherium latidens (Owen, 1846) from the lower Pleistocene locality Dafnero, Western Macedonia, Greece
FIG. 1. — Homotherium latidens (Owen, 1846), Dafnero 3, Macedonia Greece, middle Villafranchian, cranium DFN3-152, in: A, left lateral; B, right lateral; C, dorsal; D, ventral; E, detailed canine views. Scale bar: 5 cm.
FIG. 2 in The saber-toothed cat Homotherium latidens (Owen, 1846) from the lower Pleistocene locality Dafnero, Western Macedonia, Greece
FIG. 2. — Homotherium latidens (Owen, 1846), Dafnero 3, Macedonia Greece, middle Villafranchian, humerus DFN3-153 in: A, anterior; B, posterior; C, lateral; D, medial views. Scale bar: 5 cm.
FIG. 4 in The saber-toothed cat Homotherium latidens (Owen, 1846) from the lower Pleistocene locality Dafnero, Western Macedonia, Greece
FIG. 4. — Scatter diagram comparing the upper canine dimensions of Homotherium Fabrini, 1890 and Megantereon Croizet & Jobert, 1828 from various Eurasian localities. Data sources: Bonis (1976), Koufos (1992), Galobart et al. (2003), Palmqvist et al. (2007) and Sardella & Iurino (2012).
Fig. 7 in New bryozoan species from the Pleistocene of the Wanganui Basin, North Island, New Zealand
Fig. 7. Frequency distribution of zooidal size (mean ZL in mm) in 56 Microporella species known to possess ovicells and for which zooidal size has been reported in the literature.
Fig. 6 in New bryozoan species from the Pleistocene of the Wanganui Basin, North Island, New Zealand
Fig. 6. Microporella hyadesi (Jullien, 1888) sensu Brown 1952 (NHMUK D36796 and D36797), Southland, Waianan, Middle Miocene, base of the uppermost Mt. Brown "E" Limestone, Junction of Weka Creek, Weka Pass Stream, Waipara, Canterbury, New Zealand. Two colony fragments including autozooids and ovicellate zooids. Scale bars = 200 µm.
Fig. 5. Microporella ordo Brown, 1952. A–C in New bryozoan species from the Pleistocene of the Wanganui Basin, North Island, New Zealand
Fig. 5. Microporella ordo Brown, 1952. A–C. Holotype (NHMUK D36809), Wanganui, Castlecliffian Horizon CU3, Pleistocene, NZGS Loc. 4013 Castlecliff, New Zealand. A. Frontal view of the linear colony fragment. B. Close-up of an autozooid. C. Close-up of the orifice and ascopore. D. Paratype (NHMUK D36806), same provenance as holotype, view of the linear colony fragment. Scale bars: A, D = 200 µm; B = 100 µm; C = 20 µm.
Fig. 3 in New bryozoan species from the Pleistocene of the Wanganui Basin, North Island, New Zealand
Fig. 3. Parkermavella columnaris sp. nov. A–C. Paratype (NHMUK PI BZ 7832), Castlecliffian, Pleistocene, Upper Kai-Iwi Shellbed, New Zealand. A. View of a small colony. B. Group of autozooids. C. Two ovicellate zooids. D. Paratype (NHMUK PI BZ 7833), same provenance as preceding, inner view of the frontal shield showing part of the ring scar bordering the umbonuloid area. Scale bars: A = 500 µm; B–C = 100 µm; D = 50 µm.
Fig. 1 in New bryozoan species from the Pleistocene of the Wanganui Basin, North Island, New Zealand
Fig. 1. Buskia waiinuensis sp. nov., holotype (GNS BZ 335), Nukumaruan, Pleistocene, Nukumaru Limestone, Waiinu Beach, New Zealand. A. General view of the bioimmured colony, showing the regular development of the stolonal pattern. B. Close-up of a sector of the colony. C. Close-up of a zooid with oval orifice. Note the cystid appendage lateral to the orifice and the concentric lines on the zooidal and stolonal surface. D. Close-up of a zooid with a circular orifice and two cystid appendages lateral to the orifice. Scale bars: A = 1 mm; B = 200 µm; C = 50 µm; D = 100 µm.
Fig. 2 in New bryozoan species from the Pleistocene of the Wanganui Basin, North Island, New Zealand
Fig. 2. Parkermavella columnaris sp. nov., holotype (NIWA 97418), Recent, inferred greater Cook Strait, New Zealand. A. Group of ovicellate zooids. B. Tilted close-up of an autozooid showing the broadly cleithridiate (keyhole shaped) orifice, four distal oral spines, two of which coalescent, and the suboral avicularium with complete cross-bar. C. Lateral view of the columnar peristome bearing the suboral avicularium. D. Inner view of the frontal shield showing the umbonuloid area and ring scar. Scale bars: A = 250 µm; B = 100 µm; C–D = 50 µm.
Figure 6 in Four New Bat Species (Rhinolophus hildebrandtii Complex) Reflect Plio-Pleistocene Divergence of Dwarfs and Giants across an Afromontane Archipelago
Figure 6. Relative warps analysis (RWA) of 13 dorsal cranial landmarks from 22 individuals of R. hildebrandtii s.l. belonging to two molecular clades and two lineages of Clade 1 (see Fig. 3). Revised taxon names are provided in parentheses (see Taxonomic Conclusions). Skulls which were included in this analysis are indicated in Table S1. Symbols as in Fig. 5. Thin plate splines (grids) show landmark distortions represented by extremes of variation on RW1 (left = negative; right = positive) and RW2 (bottom = negative; top = positive) axes. The two skull photographs at the bottom are of actual specimens representing the negative (left: TM 41997ı smithersi from Pafuri) and positive (right: DM 11560ı cohenae from Mayoı Mpumalanga Province) extremes of variation on RW1. Landmark positions (filled circles) are shown in the photograph in the centre. doi:10.1371/journal.pone.0041744.g006
Figure 9 in Four New Bat Species (Rhinolophus hildebrandtii Complex) Reflect Plio-Pleistocene Divergence of Dwarfs and Giants across an Afromontane Archipelago
Figure 9. Dorsal (D), ventral (V) and lateral (L) view of bacula (tips on right) from four individuals (a–d) from Mpumalanga (Clade 1a = cohenae sp. nov.), two (e–f) from lowland sites in Mozambique (Clade 2 = mossambicus sp. nov.) and one (g) from Mt Mabu in Mozambique (Clade 1b = mabuensis sp. nov.). a = DM 11558 (Sudwala); b = DM 11620 (Barberton Tunnel; Topotype of cohenae); c = DM 11560 (Mayo); d = DM 11618 (Barberton Tunnel); e = DM 8580 (Gorongosa); f = DM 8578 (Niassa GR; Holotype of mossambicus); g = DM 10842 (Mt Mabu; Holotype of mabuensis). Bacula of Clade 1a (cohenae sp. nov.) have spatulate tip (rounded in Clades 2 (mossambicus sp. nov.) and 1b (mabuensis sp. nov.))ı typically emarginated basal portion (less so in Clades 2 and 1b) and shaft laterally compressed (cylindrical in Clades 2 and 1b) and sloping downwards in lateral view (horizontal in Clades 2 and 1b). doi:10.1371/journal.pone.0041744.g009
Figure 5 in Four New Bat Species (Rhinolophus hildebrandtii Complex) Reflect Plio-Pleistocene Divergence of Dwarfs and Giants across an Afromontane Archipelago
Figure 5. Canonical variates analysis (CVA) (a) of 10 cranial variables in five groups of the Rhinolophus hildebrandtii complex defined by molecular analysis; and PCA (b) of five cranial variables for sample in (a) with type series of hildebrandtii (''H¹'') and eloquens (''E¹'') added. Open circles = Clade 1a (= cohenae sp. nov.); closed circles = Clade 1b (= mabuensis sp. nov.); shaded circles = Clade 1d (= smithersi sp. nov.; Pafuri); asterisk enclosed in circle = Clade 1e (= smithersi sp. nov.; Zimbabwe); open squares = Clade 2 (mossambicus sp. nov.; Mozambique); shaded squares = Clade 2 (mossambicus sp. nov.; Lutopeı Zimbabwe); open diamonds = R. eloquens type series (Clade 3); crosses in circles = R. hildebrandtii type and co-type (Clade 1c). doi:10.1371/journal.pone.0041744.g005
Figure 1 in Four New Bat Species (Rhinolophus hildebrandtii Complex) Reflect Plio-Pleistocene Divergence of Dwarfs and Giants across an Afromontane Archipelago
Figure 1. Portraits of (a) Rhinolophus smithersi species novo, and (b) Rhinolophus mossambicus species novo, two of four new cryptic species described herein within the R. hildebrandtii complex. doi:10.1371/journal.pone.0041744.g001
Figure 4 in Four New Bat Species (Rhinolophus hildebrandtii Complex) Reflect Plio-Pleistocene Divergence of Dwarfs and Giants across an Afromontane Archipelago
Figure 4. Morphometric variation in a series representing the R. hildebrandtii complex from Lutope-Ngolangola, Zimbabwe: a) biplot of forearm length versus noseleaf width and b) PCA of five craniometric variables (M3M3, CM3, IOC, NW, NH) in 26 individuals of known (37 or 46 kHz) and unknown (?) frequency. Females indicated by open circlesı males by closed circles or crosses or asterisk. Voucher specimens for molecular sequencing study indicated by asterisk (Clade 1e: = smithersii sp. nov.; see Taxonomic Conclusions) and crosses (Clade 2: = mossambicus sp. nov.; see Taxonomic Conclusions). Hereafterı all individuals with a frequency of 37 kHz were assumed to belong to Clade 2 (mossambicus sp. nov.) and the 46 kHz individual was assumed to belong to Clade 1e (smithersi sp. nov.). doi:10.1371/journal.pone.0041744.g004
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.