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Figs 2A–J in Morphology and Molecular Phylogeny of the Soil Ciliate Anteholosticha rectangula sp. nov. from King George Island, Maritime Antarctica
Figs 2A–J. Photomicrographs of Anteholosticha rectangula in vivo. A–C – representative individuals showing contractile vacuole (arrows) and ciliatures; D – nuclear apparatus, E–G – cortical granules in ventral (E) and dorsal (F, G) views; H–J – ventral views showing oral apparatus; arrows in I and J show buccal lip and buccal seal, respectively. CG – cortical granules, DB – dorsal bristles, Ma – macronuclear nodules, Mi – micronuclei, RMC – right marginal cirri, TC – transverse cirri. Scale bars: 100 μm (A, C, D), 5 μm (G), 10 μm (H, I).
Figs 1A–I in Morphology and Molecular Phylogeny of the Soil Ciliate Anteholosticha rectangula sp. nov. from King George Island, Maritime Antarctica
Figs 1A–I. Drawings of Anteholosticha rectangula in vivo (A, D–G, I) and after protargol impregnation (B, C, H). A – ventral view of a representative specimen; B and C – ventral and dorsal views of holotype, arrows show two dikinetids; D–G – cortical granules on dorsal (D, G) and ventral sides (E, F); H – nuclear apparatus, showing variation in number and morphology; I – contractile vacuole. CG – cortical granules, CV – contractile vacuole, DB – dorsal bristles, DK1–3 – dorsal kineties 1–3, FTC – frontoterminal cirri, Ma – macronuclear nodules, Mi – micronuclei, TC – transverse cirri. Scale bars: 50 μm.
FIGURE 10 in Were terror birds the apex continental predators of Antarctica? New findings in the early Eocene of Seymour Island
FIGURE 10. Paleoenvironmental reconstruction of the Ypresian continental communities of Seymour Island. A large Cariamiform hunting a medium-sized ungulate and staring at Notiolofos regueroi (Mammalia: Sparnotheriodontidae), a couple of marsupials on a tree, Antarctoboenus carlinii (Aves, Falconiformes) flying on the sky, and a flightless Ratites in the back.
FIGURE 7 in Were terror birds the apex continental predators of Antarctica? New findings in the early Eocene of Seymour Island
FIGURE 7. Ungual phalanx of representatives of the most relevant groups compared with the Antarctic specimens described in this study. A, Antarctic fossil MLP-PV 13-XI-28-546; B, Chunga incerta (Cariamiformes); C, Vultur gryphus (Cathartiformes); D, Caracara plancus (Falconiformes); E, Geranoaetus melanoleucus (Accipitriformes); F, Ninox novaeseelandiae (Strigiformes); G, Casuarius casuarius (Casuariformes); H, Dromaius novaehollandiae (Struthioniformes); I, Rhea americana (Rheiformes); J, Tinamus solitarius (Tinamiformes); K, Penelope obscura and L, Crax fasciolata (Galliformes); M, Otis tarda (Otidiformes); N, Chauna torquata (Anseriformes); O, Macronectes giganteus (Procellariiformes); P, Anthropornis grandis (giant Antartic Sphenisciformes); and Q, Pygoscelis antarctica (modern Sphenisciformes). Scale bar: 10 mm.
FIGURE 4 in Were terror birds the apex continental predators of Antarctica? New findings in the early Eocene of Seymour Island
FIGURE 4. Fossil cariamiforms examined here. Ungual phalanx of the second right digit MLP-PV 13-XI-28-546 (A, C, E, G) in lateral (A), dorsal (C), medial (E), and proximal (G) views, and ungual phalanx of second digit MLP-PV 14-I- 10-199 (B, D, F) in lateral or medial (B, F) and dorsal (D) views. Scale bar: 10 mm.
FIGURE 3 in Were terror birds the apex continental predators of Antarctica? New findings in the early Eocene of Seymour Island
FIGURE 3. Linear and angular measurements taken on the schematic ungual phalanges in A-B lateral, and C, proximal views. Abbreviations: BH, basal height; HAF, maximum height of the articular facet; ICA, inner curvature angle; LFT, flexor tubercle length; OCA, outer curvature angle; TL, total length; and WAF, maximum width of articular facet.
FIGURE 6 in Were terror birds the apex continental predators of Antarctica? New findings in the early Eocene of Seymour Island
FIGURE 6. Biplot of the Principal Component Analyses (PCA). A, Analysis without normalization of data; B, Analysis with variables converted into indexes. Abbreviations: BH, basal height; HAF, maximum height of the articular facet; ICA, inner curvature angle; LFT, flexor tubercle length; OCA, outer curvature angle; TL, total length; and WAF, maximum width of articular facet.
FIGURE 2 in Were terror birds the apex continental predators of Antarctica? New findings in the early Eocene of Seymour Island
FIGURE 2. Anatomical terms used for descriptions and comparisons (after Baumel et al., 1993) in A, dorsal; B, lateral; and C, proximal views. Abbreviations: ap. phal., apex phalanx; corp. phal., corpus phalangis; cot. art., cotyla articularis (articular or proximal face); cot. art. lat., cotyla articularis lateralis; cot. art. med., cotyla articularis medialis; sulc. neur., sulcus neurovascularis (neurovascular sulcus); tuberc. ext., tuberculum extensorium (extensor tubercle); tuberc. flex., tuberculum flexorium (flexor tubercle).
FIGURE 5 in Were terror birds the apex continental predators of Antarctica? New findings in the early Eocene of Seymour Island
FIGURE 5. Morphological differences between the ungual phalanges of each digit (I, II, II, and IV) of Cariama cristata (A-D) and Psilopterus colzecus (E) in A, lateral; B, dorsal; C, plantar; D and E, proximal (articular) views (not scaled).
FIGURE 1 in Were terror birds the apex continental predators of Antarctica? New findings in the early Eocene of Seymour Island
FIGURE 1. Geological map of the Seymour Island showing the fossiliferous sites where MLP-PV 13-XI-28-546 and MLP-PV 14-I-10-199 were found (A) and the corresponding stratigraphy of the locality IAA 2/13 (B), in the James Ross Basin (C), West Antarctica (D). Modified from Montes et al. (2019).
FIGURE 9 in Were terror birds the apex continental predators of Antarctica? New findings in the early Eocene of Seymour Island
FIGURE 9. Three-dimensional reconstructions (not scaled) of different ungual phalanges. The dotted lines indicate the transversal cut areas shown below each phalanx. The arrowheads mark the path of the neurovascular sulcus and/or neurovascular canal along the phalanx. A, Patagornis marshi (MLP-PV 20-85, digit III); B, Patagornis marshi (MLP-PV 20-86, digit III); C, Psilopterus colzecus (MLP-PV 76-VI-12-2, digit II); D, Brontornis burmeisteri (MLP-PV 20-570, digit III); E, Phorusrhacos longissimus (MLP-PV 67-VIII-28-1, digit II); F, Andrewsornis abbotti MLP-PV 59-II-26-83 (digit II).
FIGURE 8 in Were terror birds the apex continental predators of Antarctica? New findings in the early Eocene of Seymour Island
FIGURE 8. Antarctic ungual phalanx compared with different Phorusrhacidae species in lateral view. A, MLP-PV 13- XI-28-546; B, Phorusrhacos longissimus (AMNH 9497 taken from Sinclair and Farr 1932 and mirrored); C, Procariama simplex MACN 8275; D, Phorusrhacus (MLP-PV 20-572); E, Paraphysornis brasiliensis; F, Patagornis marshi MLP-PV 20-184; G, Procariama simplex MACN 8225; H, Devincenzia pozzi MACN Pv 6681; I, Titanis walleri (calcotype UF 10417); J, Psilopterinae indet. MLP-PV 90-III-5-56; K, Mesembriornis milneedwardsi MACN Pv 5944; L, Patagornis marshi MLP-PV 20-164; M, Psilopterus colzecus MLP-PV 76-VI-12-2; N, Psilopterinae indet. MPEF-PV 12256; O, MMP s/n Phorusrhacidae (re-drawn from Cenizo et al., 2012). Scales bar: 10 mm (except for C, G, M, and N where the scale represents 20 mm).
A compilation of beryllium-isotope, element, and grainsize data from sediments sampled from Prydz Bay and beneath Amery Ice Shelf, East Antarctica
<p>All tables are included in a single .xlsx file across three sheets. Each sheet includes sample information data: expedition and sample location information, reference to corresponding method section in text, and a reference to the source of the method employed for different procedures, or the reference to source data. Footnotes are used where necessary to explain a component of a table.</p> <p><strong>Supplementary Table 1:</strong> All beryllium data used for Sequential, Grainsize, Partial, and Total experiments described in text. 10Be concentration and corresponding 1-sigma (10^8 at/g), 9Be concentration and corresponding 1-sigma (10^15 at/g), and the 10Be/9Be ratio and corresponding 1-sigma (10^-8 at/at).</p> <p><strong>Supplementary Table 2: </strong>Element concentrations (µg/g) from samples across open marine and sub-ice shelf environments and their resultant enrichment factors (EF). Enrichment factors calculated using in text Equation 1. Estimated crustal abundance and ratio displayed below the data table.</p> <p><strong>Supplementary Table 3: </strong> Grainsize of samples used in this study. </p> <p> </p> <p>This research was supported by the Australian Research Council Special Research Initiative, Australian Centre for Excellence in Antarctic Science (Project Number SR200100008).</p>
Fig. 1. Circular Bayesian tree inferred from mtDNA cox-2 in Temporal stability of parasite distribution and genetic variability values of Contracaecum osculatum sp. D and C. osculatum sp. E (Nematoda: Anisakidae) from fish of the Ross Sea (Antarctica)
Fig. 1. Circular Bayesian tree inferred from mtDNA cox-2 sequences obtained from specimens of C. osculatum sp. D and C. osculatum sp. E analysed in the present study, based on Bayesian Inference (BI) method using MrBayes v3.2.2 (Ronquist et al., 2012). Evolutionary distance was estimated using the TrN + G (G = 0.60) substitution model as implemented in jModeltest (Posada, 2008), with the AIC approach (Posada and Buckley, 2004). Posterior probability values are the result of 1.000000 of runs and are reported at the nodes. The coloured icons correspond to the two species considered in this study (red = C. osculatum sp. D and blue = C. osculatum sp. E).
Fig. 2 in Temporal stability of parasite distribution and genetic variability values of Contracaecum osculatum sp. D and C. osculatum sp. E (Nematoda: Anisakidae) from fish of the Ross Sea (Antarctica)
Fig. 2. Schematic distribution of the fish species examined in the present study for larval of C. osculatum sp. D and C. osculatum sp. E, along the continental shelf of the Ross Sea coastal ecosystem. Arrows indicating preferred preys and the diet preference for each fish species are reported according to the literature (La Mesa et al., 2004). The represented pelagic organisms comprise species of euphausiids and fish juveniles, benthic and epibenthic organisms are polychaetes, amphipods, decapods and gastropods. A pie chart with the relative proportions of C. osculatum sp. D and C. osculatum sp. E is given for each fish species. Squares and circles represent the hypothetical distribution of C. osculatum sp. D and C. osculatum sp. E larvae in their intermediate hosts.
Fig. 3 in Temporal stability of parasite distribution and genetic variability values of Contracaecum osculatum sp. D and C. osculatum sp. E (Nematoda: Anisakidae) from fish of the Ross Sea (Antarctica)
Fig. 3. Schematic representation of the hypothetic life-cycle of C. osculatum sp. D (a) and C. osculatum sp. E (b) in the Ross Sea.
Linked collectors and determiners for: Improving Species-Based Area Protection in Antarctica - data.
Natural history specimen data linked to collectors and determiners held within, "Improving Species-Based Area Protection in Antarctica - data". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/d61860b3-22fd-4c8f-a089-97a2d6893f8b">https://bionomia.net/dataset/d61860b3-22fd-4c8f-a089-97a2d6893f8b</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/d61860b3-22fd-4c8f-a089-97a2d6893f8b">https://gbif.org/dataset/d61860b3-22fd-4c8f-a089-97a2d6893f8b</a>. Formatted as a Frictionless Data package.
Data assimilation-based surface temperature reconstructions over the last two millennia over Antarctica
<p>This dataset contains data assimilation-based temperature and δ<sup>18</sup>O reconstructions in 10 Antarctic regions over the last two millennia, presented in :</p> <blockquote> <p><a href="https://www.clim-past-discuss.net/cp-2018-90/">Klein, F., Abram, N. J., Curran, M. A. J., Goosse, H., Goursaud, S., Masson-Delmotte, V., Moy, A., Neukom, R., Orsi, A., Sjolte, J., Steiger, N., Stenni, B., and Werner, M.: Assessing the robustness of Antarctic temperature reconstructions over the past two millennia using pseudoproxy and data assimilation experiments, Clim. Past Discuss., https://doi.org/10.5194/cp-2018-90, in review, 2018. </a></p> </blockquote> <p>We use a new database of stable oxygen isotopes in ice cores compiled in the framework of Antarctica2k (Stenni et al., 2017) to constrain model ensembles derived from two simulations: one performed using ECHAM5-MPI-OM that covers the period 800-1999 CE with a horizontal resolution of 3.75° by 3.75° (Sjolte et al., 2018), and the other performed with ECHAM5-wiso, spanning 1871-2011 CE at 1.125° spatial resolution (Steiger et al., 2017). This latter simulation is available <a href="https://zenodo.org/record/1249604#.XHa824Uo_RY">here</a>.</p> <p>Four netCDF files are available:</p> <ol> <li>d18O_DA_ECHAM5-MPI-OM_1-2015.nc: data assimilation-based δ<sup>18</sup>O reconstructions using the model ensemble derived from ECHAM5-MPI-OM</li> <li>ts_DA_ECHAM5-MPI-OM_1-2015.nc: data assimilation-based surface temperature reconstructions using the model ensemble derived from ECHAM5-MPI-OM</li> <li>d18O_DA_ECHAM5-wiso_1-2015.nc: data assimilation-based δ<sup>18</sup>O reconstructions using the model ensemble derived from ECHAM5-wiso</li> <li>ts_DA_ECHAM5-wiso_1-2015.nc: data assimilation-based surface temperature reconstructions using the model ensemble derived from ECHAM5-wiso</li> </ol> <p>The variables included in the NetCDF files are:</p> <ul> <li>region: integers from 1 to 10 corresponding to the ID of the ten reconstructions targets, that were defined in Stenni et al. (2017): <ul> <li>1: East Antarctic Plateau</li> <li>2: Wilkes Land Coast</li> <li>3: Weddell Sea Coast</li> <li>4: Antarctic Peninsula</li> <li>5: West Antarctic Ice Sheet</li> <li>6: Victoria Land Coast-Ross Sea</li> <li>7: Dronning Maud Land Coast</li> <li>8: West Antarctica</li> <li>9: East Antarctica</li> <li>10: Antarctica</li> </ul> </li> <li>time: integers from 1 to 2015, corresponding to the years CE covered by the reconstructions</li> <li>DA_ts (or DA_d18O): data assimilation-based reconstructed surface temperature (or δ<sup>18</sup>O). The values are annual means and are given in anomalies computed over full period. The units are degrees celsius (or permil). </li> <li>DA_ts_std (or DA_d18O_std): Weighted standard deviation of the particles used for reconstructing temperature (or δ<sup>18</sup>O). The units are degrees celsius (or permil).</li> </ul> <p>For a detailed description of the experimental design, please see the associated publication (Klein et al., 2018). Don't hesitate to contact <a href="mailto:francois.klein@uclouvain.be">François Klein</a> for more information.</p> <p>References</p> <p>Klein, F., Abram, N. J., Curran, M. A. J., Goosse, H., Goursaud, S., Masson-Delmotte, V., Moy, A., Neukom, R., Orsi, A., Sjolte, J., Steiger, N., Stenni, B., and Werner, M.: Assessing the robustness of Antarctic temperature reconstructions over the past two millennia using pseudoproxy and data assimilation experiments, Clim. Past Discuss., https://doi.org/10.5194/cp-2018-90, in review, 2018.</p> <p>Sjolte, J., Sturm, C., Adolphi, F., Vinther, B. M., Werner, M., Lohmann, G., and Muscheler, R.: Solar and volcanic forcing of North Atlantic climate inferred from a process-based reconstruction, Climate of the Past, 14, 1179–1194, https://doi.org/10.5194/cp-14-1179-2018, 2018.</p> <p>Steiger, N. J., Steig, E. J., Dee, S. G., Roe, G. H., and Hakim, G. J.: Climate reconstruction using data assimilation of water isotope ratios from ice cores, Journal of Geophysical Research: Atmospheres, 122, 1545–1568, https://doi.org/10.1002/2016JD026011, 2017.</p> <p>Stenni, B., Curran, M. A. J., Abram, N. J., Orsi, A., Goursaud, S., Masson-Delmotte, V., Neukom, R., Goosse, H., Divine, D., van Ommen, T., Steig, E. J., Dixon, D. A., Thomas, E. R., Bertler, N. A. N., Isaksson, E., Ekaykin, A., Werner, M., and Frezzotti, M.: Antarctic climate variability on regional and continental scales over the last 2000 years, Climate of the Past, 13, 1609–1634, https://doi.org/10.5194/cp-13-1609-2017, 2017.</p>
Snow properties measurements (in situ & retrived from satellite) at Dome C, East Antarctica Plateau
<p>The dataset contains the data inputs for the electromagnetic model:</p> <ul> <li>the snow density profile down to 20 m depth (measured in 2010)</li> <li>the snow SSA profile down to 20 m depth (measured in 2010)</li> <li>the snow temperature profile down to 20 m depth (measured from 1 December 2006 to 4 October 2011)</li> </ul> <p>The dataset contains also the data retrieved from satellite:</p> <ul> <li>the retrieved surface snow density from AMSR-E satellite (obtained from 18 June 2002 to 4 October 2011)</li> </ul> <p>The dataset contains finally the data measured in situ to compare with the data retrieved from satellite:</p> <ul> <li>the surface snow density from CALVA program (measured from 3 February 2010 to 4 October 2011)</li> <li>the surface snow density from PNRA program measured in snow pits (measured from 18 December 2007 to 4 October 2011)</li> <li>the surface snow density from PNRA program measured next to stakes (measured from 9 May 2008 to 4 October 2011)</li> </ul>
VLF phase and amplitude data recorded at Scott Base Antarctica
<p>This dataset contains the phase and amplitude data from VLF radio transmitter NPM (Hawaii, 21.4 kHz, 21.4⁰N, 158.2⁰E) recorded at the field-site for New Zealand's Scott Base, Arrival Heights, in Antarctica (77.8⁰S, 166.8⁰E). The propagation path is ~11 Mm long, oriented nearly north-south, with the mid-point at 28.9⁰S, 164.4⁰W.</p> <p>The data files are formatted as ASCII text files with columns of time (s), amplitude (dB) & phase (degrees) data. The MATLAB script plotUltraMSK.m can be used to plot the data files and an example data plot has been included in the dataset.</p>
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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)
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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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.