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1,301 results for “Early Cretaceous”
Data from: The first flea with fully distended abdomen from the Early Cretaceous of China
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Data from: A new ophthalmosaurid ichthyosaur from the early Cretaceous of Colombia
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Data from: New small-bodied ornithopods (Dinosauria, Neornithischia) from the Early Cretaceous Wonthaggi Formation (Strzelecki Group) of the Australian-Antarctic rift system, with revision of Qantassaurus intrepidus Rich and Vickers-Rich, 1999
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Data from: Flight reconstruction of two European enantiornithines (Aves, Pygostylia) and the achievement of bounding flight in Early Cretaceous birds
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Figure 1 from: Wang Y, Wang M, Shih C, Rasnitsyn AP, Yao J, Ren D, Gao T (2019) A new sawfly of Megalodontesidae (Insecta, Hymenoptera, Pamphilioidea) with pectinate antennae from the Early Cretaceous of China. ZooKeys 893: 115-123. https://doi.org/10.3897/zookeys.893.38512
Figure 1 A–DJibaissodes peichenae sp. nov., holotype, part: A photograph of complete specimen B line drawing of complete specimen C line drawing of forewing D line drawing of hind wing E, FJibaissodes giganteus, holotype: E line drawing of forewing F line drawing of hind wing. Scale bars: 2 mm (A, B), 1 mm (C–F).
Figure 3 from: Wang Y, Wang M, Shih C, Rasnitsyn AP, Yao J, Ren D, Gao T (2019) A new sawfly of Megalodontesidae (Insecta, Hymenoptera, Pamphilioidea) with pectinate antennae from the Early Cretaceous of China. ZooKeys 893: 115-123. https://doi.org/10.3897/zookeys.893.38512
Figure 3 Jibaissodes peichenae sp. nov., holotype, counterpart A complete specimen B right hind leg C left hind leg. Arrows indicate spurs. Scale bars: 2 mm (A); 1 mm (B, C).
Figure 2 from: Wang Y, Wang M, Shih C, Rasnitsyn AP, Yao J, Ren D, Gao T (2019) A new sawfly of Megalodontesidae (Insecta, Hymenoptera, Pamphilioidea) with pectinate antennae from the Early Cretaceous of China. ZooKeys 893: 115-123. https://doi.org/10.3897/zookeys.893.38512
Figure 2 A–EJibaissodes peichenae sp. nov., holotype, part: A head B basis of left antenna C basis of right antenna D right antenna E basal to middle section of right antenna F, GJibaissodes bellus, holotype: F right antenna G apical portion of right antenna. Abbreviations: md = mandible, sc = scape, ped = pedicel, oc = ocelli, 1st fla = 1st flagellomere, N1 = pronotum, psc2 = mesoscutum. Scale bars: 1 mm (A, D, F, G); 0.5 mm (B, C, E).
Fig. 9 in Phylogenetic relationships of Chanidae (Teleostei: Gonorynchiformes) as impacted by Dastilbe moraesi, from the Sanfranciscana basin, Early Cretaceous of Brazil
Fig. 9. Caudal-fin skeleton in Dastilbe moraesi as observed in: a. specimen CPUFMT 746, 28.0 mm TFL, anterior to right; b. specimen CPUFMT 736, 37.0 mm TFL, anterior to right and c. specimen CPUFMT 748, 21.0 mm TFL, anterior to left.
Fig. 8. a in Phylogenetic relationships of Chanidae (Teleostei: Gonorynchiformes) as impacted by Dastilbe moraesi, from the Sanfranciscana basin, Early Cretaceous of Brazil
Fig. 8. a. Dorsal view of the posterior portion of skull in Dastilbe moraesi (CPUFMT 732.7 mm TFL) and b. Chanos chanos (modified from Poyato-Ariza et al., 2010). c. Dorsal view of the anterior portion of skull in Dastilbe moraesi (CPUFMT 735, 26.4 mm SL). Synapomorphies of Chanini observed are: 1- exoccipitals with a posterior concave-convex border, with a projection above basioccipital. 2- large mesethmoid, with broad posterolateral wing-like expansions.
Fig. 7 in Phylogenetic relationships of Chanidae (Teleostei: Gonorynchiformes) as impacted by Dastilbe moraesi, from the Sanfranciscana basin, Early Cretaceous of Brazil
Fig. 7. Opercular region of Dastilbe moraesi (CPUFMT 745, 16.3 mm TFL) in lateral view, anterior to left: Synapomorphies of Chanidae observed are: opercular bone is expanded, at least one-third of the head length; and suprapreopercular bone is present as a relatively large, flat bone.
Fig. 5. a in Phylogenetic relationships of Chanidae (Teleostei: Gonorynchiformes) as impacted by Dastilbe moraesi, from the Sanfranciscana basin, Early Cretaceous of Brazil
Fig. 5. a. Dastilbe moraesi (CPUFMT 5150, 16.0 mm TFL), anterior to left. b. Dastilbe moraesi (CPUFMT 730, 30.0 mm TFL), anterior to left. Synapomorphies of Gonorynchiformes observed are: 1-cephalic ribs; 2- parietals reduced and separated by supraoccipital, 3- absence of premaxillary ascending process.
Fig. 1 in Phylogenetic relationships of Chanidae (Teleostei: Gonorynchiformes) as impacted by Dastilbe moraesi, from the Sanfranciscana basin, Early Cretaceous of Brazil
Fig. 1. Paratypes of Dastilbe moraesi: a. DGM 594P, 33.7 mm SL, anterior to left; b. DGM 595P, 39.2 mm TFL, anterior to right; c. DGM 596P (larger specimen), 58.0 mm SL, anterior to rigth; and d. DGM 600P (larger specimen), 58 mm SL, anterior to left.
Fig. 2. a. Dastilbe moraesi, DGM 593-P, 47.0 in Phylogenetic relationships of Chanidae (Teleostei: Gonorynchiformes) as impacted by Dastilbe moraesi, from the Sanfranciscana basin, Early Cretaceous of Brazil
Fig. 2. a. Dastilbe moraesi, DGM 593-P, 47.0 mm SL, holotype, Fazenda São José do Geribá, Presidente Olegário, State of Minas Gerais, Brazil; b. Dastilbe crandalli, DGM 176-P, 153.6 mm SL, holotype of Dastilbe elongatus, Brazil, State of Ceará, Sítio Romualdo, 15 km from Crato, coll. C. G. Gomes, August 1934.
Fig. 4. a in Phylogenetic relationships of Chanidae (Teleostei: Gonorynchiformes) as impacted by Dastilbe moraesi, from the Sanfranciscana basin, Early Cretaceous of Brazil
Fig. 4. a. Single most parsimonious tree (CI= 0.743; RI= 0.733; 166 steps long) depicting phylogenetic relationships of Dastilbe moraesi and other chanids. Clades 1 to 11 are supported by synapomorphies described in S2; b. highlighted vertical branch length expresses the occurrence of taxa in the fossil record.
Fig. 3 in Phylogenetic relationships of Chanidae (Teleostei: Gonorynchiformes) as impacted by Dastilbe moraesi, from the Sanfranciscana basin, Early Cretaceous of Brazil
Fig. 3. Outlines of the premaxilla and the maxilla in three chanid genera in order to compare the relative length and curvature of the premaxillary process of the maxilla in: a. Dastilbe elongatus, based mostly on specimens AMNH 31 and AMNH 12721 (redrawn from Poyato-Ariza, 1996a, figs. 2A and 7); b. Nanaichthys longipinnus, based on the holotype, DGM.1016-P (redrawn from Amaral, Brito, 2012, fig. 4C); and c. Rubiesichthys gregalis, based on the restoration of the skull from numerous specimens (redrawn from Poyato-Ariza, 1996b, fig. 2). All left side, lateral view. Scale bars = 1 mm.
Data from: Phylogeny, ecology and deep time: 2D outline analysis of anuran skulls from the Early Cretaceous to Recent
Anurans have a long fossil record, spanning from the Early Jurassic to Recent. However, specimens are often severely flattened, limiting their inclusion in quantitative analyses of morphological evolution. We perform a two-dimensional morphometric analysis of anuran skull outlines, incorporating 42 Early Cretaceous to Miocene species, as well as 93 extant species in 32 families. Outlines were traced in tpsDig2 and analysed with elliptical Fourier analysis. Fourier coefficients were used in MANOVAs, phylogenetic MANOVAs (as significant phylogenetic signal was found) and disparity analyses across multiple ecological and life history groupings. The Neotropical realm showed higher disparity than the Australian, Palearctic and Oriental realms (p = 0.007, 0.013, 0.038, respectively), suggesting concordance of disparity and diversity. Developmental strategy had a weak effect on skull shape (R2 = 0.02, p = 0.039), and disparity was similar in metamorphosing and direct developing frogs. Ecological niche was a significant discriminator of skull shape (F = 1.43, p = 0.004), but not after phylogenetic correction. Evolutionary allometry had a small but significant influence on the cranial outlines of the combined extant and fossil dataset (R2 = 0.05, p = 0.004). Finally, morphospace occupation appears to have changed over time (F = 1.59, p = 5 × 10-10). However, as with ecological signal, this shift appears to be largely driven by phylogeny and was not significant after phylogenetic correction (R2 = 0.26, p = 0.22). This study thus suggests that frog skull evolution is shaped more by phylogenetic constraints than by ecology.
FIGURE 4 in A new side-necked turtle (Pleurodira, Pelomedusoides) from the Santana Formation (Early Cretaceous), Araripe Basin, Northeastern Brazil
FIGURE 4. Ventral view of Caririemys violetae. Scale: 30 mm.
FIGURE 7 in A new side-necked turtle (Pleurodira, Pelomedusoides) from the Santana Formation (Early Cretaceous), Araripe Basin, Northeastern Brazil
FIGURE 7. Right femur (A) dorsal; (B) ventral; (C) caudal; (D) cranial views. Scale: 10 mm.
FIGURE 6 in A new side-necked turtle (Pleurodira, Pelomedusoides) from the Santana Formation (Early Cretaceous), Araripe Basin, Northeastern Brazil
FIGURE 6. Right plevis (A) lateral; (B) medial; (C) caudal; (D) cranial views. Scale: 20 mm.
FIGURE 2 in A new side-necked turtle (Pleurodira, Pelomedusoides) from the Santana Formation (Early Cretaceous), Araripe Basin, Northeastern Brazil
FIGURE 2. Dorsal view of Caririemys violetae. Scale: 30 mm.
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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)
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.