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212 results for “Fossil localities”
Data from: Local molecular clocks in three nuclear genes: divergence times for rodents and other mammals and incompatibility among fossil calibrations.
Reconstructing the chronology of mammalian evolution is a debated issue between molecule- and fossil-based inferences. A methodological limitation of molecules is the evolutionary rate variation among lineages, precluding the application of the global molecular clock. We considered 2422 first and second codon positions of the combined ADRA2B, IRBP, and vWF nuclear genes for a well-documented set of placentals including an extensive sampling of rodents. Using seven independent calibration points and a maximum-likelihood framework, we evaluated whether molecular and paleontological estimates of mammalian divergence dates may be reconciled by the local molecular clocks approach, allowing local constancy of substitution rates with variations at larger phylogenetic scales. To handle the difficulty of choosing among all possible rate assignments for various lineages, local molecular clocks were based on the results of branch-length and two-cluster tests. Extensive lineage-specific variation of evolutionary rates was detected, even among rodents. Cross-calibrations indicated some incompatibilities between divergence dates based on different paleontological references. To decrease the impact of a single calibration point, estimates derived from independent calibrations displaying only slight reciprocal incompatibility were averaged. The divergence dates inferred for the split between mice and rats (approximately 13-19 Myr) was younger than previously published molecular estimates. The most recent common ancestors of rodents, primates and rodents, boreoeutherians, and placentals were estimated to be, respectively, approximately 60, 70, 75, and 78 Myr old. Global clocks, local clocks, and quartet dating analyses suggested a Late Cretaceous origin of the crown placental clades followed by a Tertiary radiation of some placental orders like rodents.
FIGURE 1. Fossil locality. A in New dictyopteran fossils from the Pennsylvanian of West Beijing, China
FIGURE 1. Fossil locality. A, Location map of fossil locality. B, Fossil outcrop of the black shale that yielded dictyopteran fossils.
FIGURE 1. Fossil locality. A, Locality map. B in Fossil caddis cases from the lower Eocene Huachong Formation of the Sanshui Basin, Foshan City, Guangdong Province, South China with detrital zircon analyses
FIGURE 1. Fossil locality. A, Locality map. B, The outcrop (red arrow point where the fossils collected), with hammer indicating the layer for zircon sampling.
FIGURE 1. Fossil locality. A in New insect fossils discovered from the Lower Jurassic Sangonghe Formation at the Turpan Basin, Xinjiang, NW China
FIGURE 1. Fossil locality. A, Location of fossil locality (indicated by red triangle) in China map. B, Detailed map of the fossil locality. C, Sequence of the strata: major parts with yellow-grayish stratum – the Lower Jurassic Sangonghe Formation; the reddish stratum in the distance – the Middle Jurassic Xishanyao Formation; the top stratum – the Upper Jurassic Sanjianfang Formation. D, Close view of the Sangonghe Formation and the fossil outcrop.
Distribution. Known from two localities in the Central Range of W New Guinea, between Mt Jaya and Mt Trikora. An extensive fossil record from the Holocene. in Muridae
Distribution. Known from two localities in the Central Range of W New Guinea, between Mt Jaya and Mt Trikora. An extensive fossil record from the Holocene.
FIGURE 2 in A new species of the fossil genus Electrotrichia (Insecta: Trichoptera: Hydroptilidae) from Rovno amber (Zhytomyr region, Olevsk locality)
FIGURE 2. Electrotrichia rasnitsyni sp. nov. A, Male paratype, dorsal view. B, Male type genital structures on ventrolateral view. Scale bars = 0.5 mm in A; 0.05 mm in B.
FIGURE 6. Fossil Megaloptera from Garazhovka locality, photographs. A in The oldest known larvae of Megaloptera (Insecta) from the Triassic of Ukraine
FIGURE 6. Fossil Megaloptera from Garazhovka locality, photographs. A, Sialidae, subfamilia incertae sedis, PIN 2230/34. B, Megaloptera, familia incertae sedis, PIN 3320/36. C, Megaloptera, familia incertae sedis, PIN 3320/37. Abbreviations: cf—end of caudal filament of segment X, h—head, l1—tip of foreleg, l2—tip of midleg, l3—tip of hindleg, mst—mesothorax, mmt— metathorax, pt—prothorax. Scale bars = 2 mm (A), 1 mm (B), 0.5 mm (C).
Data from: The Beothukis/Culmofrons problem and its bearing on Ediacaran macrofossil taxonomy: evidence from an exceptional new fossil locality
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Data from: Local molecular clocks in three nuclear genes: divergence times for rodents and other mammals and incompatibility among fossil calibrations.
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FIG. 2. — A-I in Icacinaceae fossil fruits from three sites of the Paris Basin (early Eocene, France): local diversity and global biogeographic implications
FIG. 2. — A-I, Iodes passiciensis Del Rio & De Franceschi, sp. nov. (MNHN.F.44736): A, lateral view of an endocarp showing the reticulum pattern of rounded and thin ridges; B, dorsal view showing the keel, surrounding the endocarp; C, lateral view of second face of the endocarp; D, basal view; E, apical view; F, magnification showing the pores abraded; G, SEM view of wall and ridges in transversal section; H, SEM view of rounded papillae; I, same with magnification. J-Q, Iodes reidae Del Rio, Thomas & De Franceschi (MNHN.F.44737): J, lateral view of endocarp showing the reticulum pattern of rounded ridges; K, dorsal view showing the keel, surrounding the endocarp; L, lateral view of second face of endocarp; M, basal view; N, apical view; O, magnification showing the areoles from the reticulation of ridges; P, SEM view of wall and ridges in transversal section; Q, SEM view of the trace left by the vascular bundle embedded in the endocarp wall. Scale bar: A-E, 5 mm; O-Q, 1 mm; J-N, 10 mm; G, 500 µm; F, 100 µm; H, 50 µm; I, 10 µm.
FIG. 1 in Icacinaceae fossil fruits from three sites of the Paris Basin (early Eocene, France): local diversity and global biogeographic implications
FIG. 1. — Geological map showing the locations of the five sites with Icacinaceae remains in the Paris Basin. Light Grey, Cenozoic; Grey, Upper Cretaceous; Dark grey, Lower Cretaceous. Modified from "Synthèse géologique du Bassin de Paris" (Mégnien 1980).
FIG. 5 in Icacinaceae fossil fruits from three sites of the Paris Basin (early Eocene, France): local diversity and global biogeographic implications
FIG. 5. — Icacinicaryites sp. (MNHN.F.44741): A, lateral view; B, dorsal view showing the keel; C, other lateral view; D, apical view; E, basal view. Scale bar: 5 mm.
FIG. 4. — A, B in Icacinaceae fossil fruits from three sites of the Paris Basin (early Eocene, France): local diversity and global biogeographic implications
FIG. 4. — A, B, Iodes sp. (MNHN.F.8100): A, lateral view of the endocast; B, vascular bundle embedded on the endocarp wall (arrow); C, Palaeophytocrene sp. (MNHN.F.8061), lateral view. Scale bars: A-C, 5 mm; B, 1 mm.
FIG. 3. — A-E in Icacinaceae fossil fruits from three sites of the Paris Basin (early Eocene, France): local diversity and global biogeographic implications
FIG. 3. — A-E, Iodes tubulifera Del Rio, Thomas & De Franceschi (MNHN.F.44738): A, lateral view of an endocarp showing the reticulum pattern of sharp ridges; B, dorsal view showing the keel; C, lateral view of second face of the endocarp; D, apical view showing the small pair of horns (arrows); E, basal view. F-I, MNHN.F.44740; F, lateral view of the endocarp showing the reticulum pattern of sharp ridges; G, SEM view of the endocarp wall units and ridges in transversal section; H, SEM view of tubular papillae; I, same with magnification. Scale bars: A-F, 5 mm; G-H, 500 µm; I, 30 µm.
Cladistic matrix targeted at resolving relationships between fossil birds from the Changma locality of the Lower Cretaceous Xiagou Formation
<p>We describe six specimens consisting of cranial remains and associated partial presacral axial series belonging to ornithuromorph birds from the Changma locality of the Lower Cretaceous Xiagou Formation of northwestern Gansu Province, China. Comparison among specimens is limited by the paucity of overlapping elements, their differing exposed views, and, in some specimens, poor preservation. Despite this, three separate taxa are represented, evidenced by differences in their dentary dentitions: one specimen is edentulous, another has sharp, closely spaced, relatively high-crowned and peg-like teeth, and a third preserves blunt, relatively low-crowned teeth placed in a communal groove, a morphology previously reported among adult birds only in Hesperornithiformes. We propose that the high-crowned specimen may be referred to Gansus yumenensis based on shared similarities with the closely related Iteravis huchzermeyeri, including a very similar dentition and an edentulous premaxilla with elongate, unfused frontal processes and no palatal processes. The two other specimens are considered new taxa, for which we erect the names Meemannavis ductrix gen. et sp. nov. and Brevidentavis zhangi gen. et sp. nov. These new specimens confirm that the Changma locality is dominated by ornithuromorph birds and contribute to a better understanding of this important avifauna. The observed variation in dental morphology hints at trophic diversity like that observed in ornithuromorphs from the penecontemporaneous Jehol Group of northeastern China.</p>
FIGURE 1. Fossil locality. A in A new calopterygid damselfly (Odonata, Zygoptera) from the Oligocene Ningming Basin, Guangxi, South China
FIGURE 1. Fossil locality. A, Map of fossil locality. B, Photograph of fossil collecting.
Figure 10 in A review of the Tertiary fossil Cetacea (Mammalia) localities in Australia
Figure 10. Areas with fossil cetacean-bearing localities in South Australia. Modified from Alley et al. (1995).
FIGURE 8 in Novel analysis of locality data can inform better inventory and monitoring practices for paleontological resources at John Day Fossil Beds National Monument Oregon, USA
FIGURE 8. Boxplot of last yield over area index by hiatus length. Note the similar mean between all hiatus lengths.
FIGURE 4 in Novel analysis of locality data can inform better inventory and monitoring practices for paleontological resources at John Day Fossil Beds National Monument Oregon, USA
FIGURE 4. Aerial photograph with example measurements of T2.0" and L7.0". Fieldworkers recorded locality data by locating their place on the air photograph, measuring inches from the top and inches from the left, and writing the air photograph number and measurements in field notes.
FIGURE 5 in Novel analysis of locality data can inform better inventory and monitoring practices for paleontological resources at John Day Fossil Beds National Monument Oregon, USA
FIGURE 5. Map of field collection data for Test Area from 1999-2000. Each point represents one field number. Precise locality information is available to qualified researchers upon request from JODA's museum program.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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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.