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.
2,047
datasets available to search
ShareScore release 0.9.0
Dataset results
2,047 results for “turtles”
Figure 4 in Developmental basis of limb homology in Pleurodiran turtles, and the identity of the hooked element in the chelonian tarsus
Figure 4. Early hindlimb development in Podocnemis unifilis (A–F) and Podocnemis sextuberculata (G–I). Dorsal views of left limbs. A, stage 14; B, stage 15; C, stage 16; D, stage 17; E, stage 18; F, stage 19; G, stage 12; H, stage 15; I, stage 19. Abbreviations: 1–5, tarsalia 1–5; I–V, digits I–V; c, centrale; f, fibulare; F, femur; Fi, fibula; i, intermedium; Ti, tibia. Scale bars: 0.5 mm.
Figure 7 in Developmental basis of limb homology in Pleurodiran turtles, and the identity of the hooked element in the chelonian tarsus
Figure 7. Forelimb development in Phrynops hilarii. Dorsal views of left limbs. A, stage 17; B, stage 18; C, stage 19; D, stage 20; E, stage 23. Abbreviations: 1–5, carpalia 1–5; I–V, digits I–V; c1, centrale 1; c2, centrale 2; c3, centrale 3; c4, centrale 4; i, intermedium; p, pisiform; Ra, radius; u, ulnare. Scale bars: 0.5 mm.
Figure 2 in Developmental basis of limb homology in Pleurodiran turtles, and the identity of the hooked element in the chelonian tarsus
Figure 2. Fully ossified autopodia of adults of Podocnemis sextuberculata MZUSP 3218 (A and B), and Podocnemis unifilis MZUSP 3209 (C and D). A, dorsal view of right hand. B, dorsal view of right foot. C, dorsal view of right hand. D, dorsal view of rigth foot. Abbreviations: I–V, digits I–V; as, astragalus; c2, lateral centrale or centrale 2; cc, centralia; d1–d5, distal carpalia/tarsalia 1–5; fi, fibulare; Fi, fibula; i, intermedium; p, pisiform; Ra, radius; Ti, tibia; tp, proximal tarsale; Ul, ulna; u, ulnare. Scale bars: 5 mm.
Figure 1 in Developmental basis of limb homology in Pleurodiran turtles, and the identity of the hooked element in the chelonian tarsus
Figure 1. Autopodia of adult Phrynops hilarii. Grey areas indicate cartilages. A, dorsal view of right hand. B, dorsal view of right foot. Abbreviations: I–V, digits I–V; c2, lateral centrale or centrale 2; cc, centralia; d1–d5, distal carpalia/tarsalia 1–5; Fi, fibula; i, intermedium; p, pisiform; Ra, radius; Ti, tibia; tp, proximal tarsale; Ul, ulna; u, ulnare. Scale bars: 5 mm.
Figure 6 in Phylogenetic relationships and biogeographical history of the genus Rhinoclemmys Fitzinger, 1835 and the monophyly of the turtle family Geoemydidae (Testudines: Testudinoidea)
Figure 6. Time calibration using the program BEAST. The error bar on each node represents the 95% confidence interval calculated by the program. The column on the right shows the time slice of Isthmian closure (3.5–2.5 Mya; Coates & Obando, 1996). Pli + Ple: Pliocene + Pleistocene.
Figure 4 in Phylogenetic relationships and biogeographical history of the genus Rhinoclemmys Fitzinger, 1835 and the monophyly of the turtle family Geoemydidae (Testudines: Testudinoidea)
Figure 4. Strict consensus of three most parsimonious trees produced from 3373 aligned characters (TL = 3337; CI = 0.43; RI = 0.59) using maximum parsimony. Of these, 2315 are constant characters and 798 are potentially parsimony-informative. Numbers above and below branches are bootstrap (> 50%) and Bremer values, respectively.
Figure 3. A, the single most parsimonious tree derived from 2129 in Phylogenetic relationships and biogeographical history of the genus Rhinoclemmys Fitzinger, 1835 and the monophyly of the turtle family Geoemydidae (Testudines: Testudinoidea)
Figure 3. A, the single most parsimonious tree derived from 2129 aligned characters of mitochondrial genes (12S, 16S, cyt-b) (CI = 0.40; TL = 31; RI = 0.58) using maximum parsimony. Of these, 1229 characters are constant and 708 characters are parsimony-informative. Numbers above branches are bootstrap values and below are Bremer values. B, strict consensus of 96 trees generated from 1244 aligned characters of nuclear genes (Rag1 and Cmos) (CI = 0.82; TL = 205; RI = 0.84) using maximum parsimony. Of these, 1086 characters are constant and 90 are parsimonyinformative. Numbers above branches are bootstrap values and below are Bremer values.
Figure 2 in Phylogenetic relationships and biogeographical history of the genus Rhinoclemmys Fitzinger, 1835 and the monophyly of the turtle family Geoemydidae (Testudines: Testudinoidea)
Figure 2. Previous hypotheses regarding the position of Rhinoclemmys among geoemydids (upper cladograms) and the relationships among the species of the genus (lower cladograms). †Fossil taxon.
Figure 2 in A gigantic bizarre marine turtle (Testudines: Chelonioidea) from the Middle Campanian (Late Cretaceous) of South-western Europe
Figure 2. Shellandpelvicgirdleelementsof Leviathanochelysaenigmatica gen. etsp. nov. (a) Dorsalviewof MCD9884 with the elements disposed as they were discovered, remarking in white the preserved carapace portion (MCD9884a). (b) Visceral view of the carapacewith asuperimposed interpretation of the shell elements. (c) Dorsal view of the preserved pelvic girdle without the carapace, and (d) ventral view of the same element with the carapace. Asterisk marks indicate the location of the autapomorphic accessory pubic process. Details of the accessory pubic process in (e) dorsal and (f) ventral view. (g) Close up view of the posteromedial part of the pubes, in ventral (upper picture) and posterior view (lower picture), preserving part of the thyroid fossae separated by a thick bone structure (black arrow). (h) Ventral view of the left acetabulum, illustrating the limits between the pelvic bones. (i) Detail of the outer ornamented surfaceof the ilium. (j) Histological section of the costal 8 (MCD9884.1), showing acancellous bone zone between the highly vascularized internal and external cortices. Abbreviations: (ac) Acetabulum; (app) Accessory Pubic Process; (cb) cancellous bone; (co) costal plate; (eco) External Cortex; (ico) Internal Cortex; (il) Ilium; (ils) ilium insertion scar; (isc) Ischium; (il) Ilium; (ne) neural plate; (pb) Pubis; (pbb) pubic bridge; (tf) Thyroid fossa.
Figure 1 in A gigantic bizarre marine turtle (Testudines: Chelonioidea) from the Middle Campanian (Late Cretaceous) of South-western Europe
Figure 1. GeographicandgeologicalsituationofCalTorrades. TheCalTorradesfossillocalitylocation, respect: (a) the Iberian Peninsula; and (b) the Eastern Pyrenees. (c) Simplified geological map including the locality (white star). (d) Field capture of Cal Torrades outcrop, marking with the star the location of the fossil remains: (e) pelvis; and (f) ilium. (g) Locality stratigraphic column with the geological materials and fossil remains. Modified from Costantinoand Angelini26,Vidal27 and free access digital mapsof the Institut de Cartografia i Geologia de Catalunya (ICGC; http://www.icc.cat/vissir3/).
Figure 3 in A gigantic bizarre marine turtle (Testudines: Chelonioidea) from the Middle Campanian (Late Cretaceous) of South-western Europe
Figure 3. Phylogeneticrelationshipof Leviathanochelysaenigmatica gen. etsp. nov. Simplifiedphylogenetic hypothesis of the relationship of Leviathanochelysaenigmatica within Pan-Chelonioidea based of 20 MPT with 1647 steps according to the Strict Consensus topology. Number under main branching nodes correlate with Bremer support values. Taxa are illustrated according to their time-range occurrence, but not to the timedivergence of the nodes which are tentatively placed according to fossil record evidences.
Wikidata subset from 2018 dumps created with WDSub at Biohackathon 2022 - Turtle format
<p>Subset of Wikidata obtained using this Shape Expression: https://github.com/kg-subsetting/datasets-biohackathon2022/blob/main/GeneWiki/GeneWiki.shex</p> <p>And the wdsub tool version 0.0.28: https://github.com/weso/wdsub</p> <p>The input dump is: wikidata-20180115-all</p> <p>And the dumpformat is TURTLE</p>
GeneWiki subset created with WDSub at Biohackathon 2022 - Turtle format - Only labels en english
<p>Subset of Wikidata obtained using this Shape Expression: https://github.com/kg-subsetting/datasets-biohackathon2022/blob/main/GeneWiki/GeneWiki.shex</p> <p>And the wdsub tool version 0.0.31: https://github.com/weso/wdsub which is available at docker</p> <p>The input dump is: wikidata-20220630-all.json.gz</p> <p>And the dumpformat is Turtle/RDF</p>
FIG. 5. — Phylogenetic hypotheses including Podocnemis tatacoensis n in A new fossil turtle ends the controversy on the occurrence of the extant genus Podocnemis Wagler, 1830 at the Miocene fauna of La Venta, Colombia
FIG. 5. — Phylogenetic hypotheses including Podocnemis tatacoensis n. sp.: A, strict consensus of 192 most parsimonious trees (MPTs), obtained from the first analysis (all taxa, all morphological characters), tree length (TL) = 1318, consistency index (CI) = 0.275, retention index (RI) = 0.741, see the full tree in Supplementary Data S3 (Appendix 3); B, close up of the Podocnemis clade shown in (A). C, close up of the Podocnemis clade obtained in the strict consensus from the second analysis excluding all fossil Podocnemis except P. tatacoensis n. sp., see the full tree in Supplementary Data S4 (Appendix 4), MPTs = 48, TL = 1310, CI = 0.277, and RI = 0.744. Bootstrap (upper) and Bremer support (lower) indices are shown for some clades in (B) and (C); D, close up of the Podocnemis clade obtained from the total evidence analysis that produced a single MPT, TL = 4225, CI = 0.699, and RI = 0.794, as in the morphology only analyses, P. tatacoensis n. sp. is found to be part of Podocnemis and closer to the extant P. unifilis and the fossil P. negrii. Symbol: *, fossil taxa.
FIG. 4 in A new fossil turtle ends the controversy on the occurrence of the extant genus Podocnemis Wagler, 1830 at the Miocene fauna of La Venta, Colombia
FIG. 4. — Left hyoplastron-peripherals region in extant and some fossil podocnemidids: A, B, Podocnemis tatacoensis n. sp., specimen VPPLT-1727; C, D, P. vogli UF- 39060; E, F, P. unifilis MTKD-45847; G, P. unifilis CRI-2778; H, P. unifilis ICN-6455; I, J, P. erythrocephala CRI-6023; K, P. erythrocephala CRI-8207; L, P. erythrocephala CRI-1194; M, N, P. expansa USNM-29476; O, P. expansa NMW-35550; P, P. expansa AMNH-62947; Q, R, P. sextuberculata CRI-6543; S, P. sextuberculata CRI-2830; T, P. sextuberculata CRI-5500; U, V, P. lewyana ICN-7653; W, P. lewyana MNHN-286; X, P. lewyana ICN-1699; Y, Z, P. pritchardi UCMP-63782; A', B', Erymnochelys madagascariensis NMW-1811; C', E. madagascariensis MNHM-1534; D', E. madagascariensis NMW-139; E', F', Peltocephalus dumerilianus CRI-1344; G', Pe. dumerilianus CRI-3295;H', Pe. dumerilianus CRI-7524.Red circle indicates the close-up region showed in the right images. Green arrows indicate the axillary musk foramen of the hyoplastron (character 222), and red arrows indicate the lateral musk foramen or foramina at the hyoplastron-peripherals contact (character 269). Specimens not to scale.
FIG. 3. — Podocnemis tatacoensis n in A new fossil turtle ends the controversy on the occurrence of the extant genus Podocnemis Wagler, 1830 at the Miocene fauna of La Venta, Colombia
FIG. 3. — Podocnemis tatacoensis n. sp. details of its anatomy: A, B, close-up of the keeled neurals 2-4; C, D, left costal 1 in ventral view, sowing the shape of the axillary scar; E, left posterior margin of the carapace showing the bone predation trauma occurred to the peripherals; F, left peripherals 10-11 where the bone healed from the injury increasing the thickness and smoothing the surface; G, H, view of the right pelvic girdle; I, J, close-up of the three lateral musk foramina of the left hyoplastron-peripherals region. Abbreviations: axs, axillary scar; co, costal; hyo, hyoplastron; ili, ilium; isc, ischium; ker, keel rigde; M, marginal scute; mfo, musk foramina; ne, neural; sp, suprapygal; P, pleural scute; pe, peripheral; pub, pubis; py, pygal; res, resin; V, vertebral scute; xip, xiphiplastron. Scale bars: A, B, E, G, H, 2 cm; C, D, 1 cm; F, I, J, 5 mm.
FIG. 2 in A new fossil turtle ends the controversy on the occurrence of the extant genus Podocnemis Wagler, 1830 at the Miocene fauna of La Venta, Colombia
FIG. 2. — Stratigraphic context and temporal frame for Podocnemididae: A, chronostratigraphic context for the Honda Group (La Victoria and Villavieja formations), including the magnetostratigraphy, cartographic units, horizons and radiometric ages, as well as where the fossil podocnemidids occur including Podocnemis tatacoensis n. sp. Redrawn and modified from Montes et al. (2021); B, time of origination for the genera and some species of Podocnemididae based on the molecular hypothesis of Vargas-Ramírez et al. (2008) and fossil record (this study) for the clades that they represent. Abbreviations: Fm, formation; Gr, group; H, Holocene; L, Langhian; M, magnetostratigraphic chrons; Ma, million of years; Pleistoc., Pleistocene; Qut, Quaternary. Dotted lines indicate ghost lineage duration.
FIG. 1. — Podocnemis tatacoensis n in A new fossil turtle ends the controversy on the occurrence of the extant genus Podocnemis Wagler, 1830 at the Miocene fauna of La Venta, Colombia
FIG. 1. — Podocnemis tatacoensis n. sp. from the Middle Miocene (Serravallian), La Tatacoa Desert, Colombia: A, B, carapace in dorsal view; C, D, shell in left lateral view; D, shell in anterior view; F, G, plastron in ventral view. Abbreviations: Abd, abdominal scute; Ana, anal scute; co, costal; ent, entoplastron; epi, epiplastron; Ext, extragular scute; Fem, femoral scute; Hum, humeral scute; hyo, hyoplastron; hyp, hypoplastron; Int, intergular scute; M, marginal scute; mes, mesoplastron; mfo, musk foramina; ne, neural; nu, nuchal; P, pleural scute; pe, peripheral; Pec, pectoral scute; sp, suprapygal; py, pygal; V, vertebral scute; xip, xiphiplastron. Reconstructed bones showed in yellow shading. Scale bar: 10 cm.
Data from: Seasonality and growth in tropical freshwater ectotherm vertebrates: results from one-year experimentation in the African grey bichir, giraffe catfish, and the West African mud turtle
<p>Growth in ectotherm vertebrates is strongly rhythmed by seasonal variation in environmental parameters. To track the seasonal variation in ancient times in a continental and tropical context, we aim to develop a method based on the use of the growth rate of fossil ectotherm vertebrates (actinopterygians and chelonians) influenced by seasonal environmental fluctuations they experienced in their lifetime. However, the impact of environmental parameters on growth, positive or negative, and its intensity, depends on the taxa considered and data are scarce for tropical species. For one year, an experiment was conducted to better understand the effect of seasonal variation in environmental parameters (food abundance, temperature, and photoperiod) on the somatic growth rate of three species of tropical freshwater ectotherm vertebrates: the fishes <em>Polypterus senegalus</em> and <em>Auchenoglanis occidentalis</em> and the turtle <em>Pelusios castaneus</em>. Mimicking seasonal shifts expected to be experienced by the animals in the wild, the experiment highlighted the preponderant effect of food abundance on the growth rate of those three species. Water temperature variation had a significant effect on the growth rate of <em>Po. senegalus</em> and <em>Pe. castaneus</em>. Moreover, the photoperiod demonstrated no significant effect on the growth of the three species. The duration of application of starvation or cool water conditions, ranging from 1 to 3 months, did not affect the growth rate of the animals. However, <em>Pe. castaneus</em> showed a temporary sensitivity to the return of ad libitum feeding or of warm water, after a period of starvation or cool water, by a period of compensatory growth. Finally, this experiment revealed, in the three species, fluctuations in the growth rate under controlled and constant conditions. This variation, similar to the variation in precipitation and temperature observed in their native environment, could be linked to a strong effect of an internal rhythm controlling somatic growth rate.</p>
Activity of a freshwater turtle varies across a latitudinal gradient: implications for the success of assisted colonisation
<p>The value of assisted colonisation as a response to climate change can only be realised if focal species are well suited to their new habitats. For ectotherms, new habitats must offer microclimates that promote crucial behaviours such as thermoregulation and foraging.</p> <p>The Western Swamp Turtle (Pseudemydura umbrina), a Critically Endangered species from southwestern Australia, serves as a global case-study of assisted colonisation in action. Initial trials where juvenile P. umbrina were released into wetter and cooler climates found that individuals spent considerable time at body temperatures that apparently limited their growth.</p> <p>Using high-resolution biologging data (temperature and depth), here we tested if turtle activity is thermally constrained in cooler latitudes by releasing 48 juveniles into seasonal swamps at three sites. One site was core natural habitat, and the other sites were wetlands 380 km apart that offered either warmer or cooler microclimates. Generalised additive mixed models were used to evaluate behaviours and time spent at optimal temperatures for approximately one month following release, and growth rates were measured and analysed after release until the end of the hydroperiod 4-5 months later.</p> <p>We found that turtles released into the most poleward (southern) wetland spent significantly less time active and basking and grew significantly less compared to turtles released further north. When analysed together, behavioural and growth datasets showed that activity was positively correlated with growth rates.</p> <p>We conclude that poor growth of turtles in the southern wetland was likely a result of lower body temperatures, stemming from a reduced ability to thermoregulate in water. Consequently, for assisted colonisation of P. umbrina to be successful, recipient wetlands must offer aquatic microclimates that are sufficiently warm to promote foraging activity that leads to growth, and ultimately to maturation.</p>
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.