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1,817 results for “Late Cretaceous”
FIGURE 4 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE 4. MicroCT (µCT) scan results of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. The external surface of the crab is translucent to show the position of the preserved internal structures that the scan detected. Blue: cardiac stomach; yellow: esophagus; red: apodemes and mandibles. A, dorsal view. B, frontal view. C, right lateral view. D, closeup of dorsal view. E, closeup of frontal view. F, closeup of right lateral view. G, closeup of left lateral view.
FIGURE 3 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE 3. Exposed gills of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota and an interpretative drawing. 1-4: inferred number of gills;?af: possible afferent vessel.
FIGURE 2 in Dental ecomorphology and macroevolutionary patterns of North American Late Cretaceous metatherians
FIGURE 2. Boxplots of Dirichlet normal energy (DNE), relief index (RFI), and orientation patch count rotated (OPCR) across extant mammals classified by diet and a subset of fossil groups. Abbreviations for diet categories: ado = animal-dominated omnivore; carn = carnivore; frug = frugivore; inv = invertivore; pdo = plant-dominated omnivore; sis = soft-invertebrate specialist. Abbreviations for fossil groups: Alph. = Alphadontidae; Herpet. = Herpetotheriidae; Ped. = Pediomyidae.
FIGURE 6 in Dental ecomorphology and macroevolutionary patterns of North American Late Cretaceous metatherians
FIGURE 6. Patterns of taxonomic diversity and dietary diversity of NALK metatherians. Top: Known taxonomic diversity (gray squares and line) of NALK metatherians and the metatherian diversity sampled in this study (black circles and line). Middle: Dietary diversity of NALK metatherians through time (out of six dietary categories). Judithian diversity count is based on our DFA classification of Iugomortiferum thoringtoni as a carnivore. Bottom: Hypothesized phylogenetic relationships of NALK metatherians sampled in this study (the deltatheriid Atokatheridium boreni was removed). The phylogeny is modified from Williamson et al. (2014), Wilson et al. (2016), and Cohen et al. (2020). Thick horizontal bars represent the known temporal range of each species. Bar colors represent the dietary categories assigned to each taxon in this study. For cases in which specimens of the same species were classified differently, we include both classifications in this figure, with the exception of Iugomortiferum thoringtoni and Didelphodon vorax. Our DFA classification for Iugomortiferum thoringtoni (carn) contradicts additional lines of evidence that suggests it is a plant-dominated omnivore (see Discussion), and thus we classify it here as 'carn/pdo.' Our DFA classifies the two Didelphodon vorax specimens as an animal-dominated omnivore and an invertivore, but additional lines of evidence suggest that it is an animal-dominated omnivore (see Discussion). Abbreviations for diet categories: ado = animaldominated omnivore; carn = carnivore; frug = frugivore; inv = invertivore; pdo = plant-dominated omnivore; sis = softinvertebrate specialist. Abbreviations for NALMAs: Aquil = Aquilan; La = Lancian.
FIGURE 5 in Dental ecomorphology and macroevolutionary patterns of North American Late Cretaceous metatherians
FIGURE 5. Morphological disparity of NALK metatherians during different time bins (top) and in two major subclasses (bottom). We calculated disparity as the variance of each DTA metric and the sum of variances. The 95% confidence intervals were generated using a custom bootstrapping function with 1,000 replicates. Top row: all-metatherian disparity for each time bin. Sample size for each time bin is shown in parentheses at the bottom of the far-left plot: pre-Aquilan (preA) = 7; Aquilan = 8; Judithian = 18; Lancian = 18. Bottom row: disparity of alphadontids vs. disparity of pediomyids. Sample size for each taxon is shown in parentheses at the bottom of the far-left plot: Alphadontidae = 19 and Pediomyidae = 8. See Table 11 for P-values.
FIGURE 1 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE 1. Location of study area in South Dakota. A, paleobiogeographic map of most of North America during the Late Cretaceous (late Campanian) with the locality indicated by a red dot (modified from Sampson et al., 2010, figure 1). B, photo of the locality in Pennington County, South Dakota, USA, where the studied crab specimen was discovered. A massive limestone from the upper Campanian Didymoceras cheyennense ammonite Zone is located at the top of the hill on the right and many limestone pieces are found downslope.
FIGURE 4 in Dental ecomorphology and macroevolutionary patterns of North American Late Cretaceous metatherians
FIGURE 4. Bivariate scatter plots of log-transformed Dirichlet normal energy (lnDNE), relief index (lnRFI), and orientation patch count rotated (lnOPCR) values, and a 3D scatterplot of all three DTA metrics (bottom right) for our fossil sample. Colored polygons are regions of the morphospace occupied by extant mammals in our dietary categories. Shapes correspond to fossil groups. See Table 3 for taxonomic names. Abbreviations for diet categories: ado = animal-dominated omnivore; carn = carnivore; frug = frugivore; inv = invertivore; pdo = plant-dominated omnivore; sis = soft-invertebrate specialist.
FIGURE 2 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE 2. The crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. A, carapace in dorsal view. B, closeups of the preserved gills in left branchial chamber. C, carapace in ventral view. D, carapace in frontal view.
FIGURE S3 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE S3. Rotating illustration of the microCT (µCT) scan results of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. Blue: cardiac stomach; yellow: esophagus; red: apodemes and mandibles; purple-pink: possible anterior gastric muscles. See online version for rotation (https://palaeo-electronica.org/content/2023/3973- soft-tissues-in-fossil-crab).
FIGURE 5 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE 5. Rotating illustration (spin around the dorsal and ventral sides) of the microCT (µCT) scan results of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. Blue: cardiac stomach; yellow: esophagus; red: apodemes and mandibles. See online version for rotation (https://palaeo-electronica.org/content/2023/3973-soft-tissues-in-fossil-crab).
FIGURE 7 in Dental ecomorphology and macroevolutionary patterns of North American Late Cretaceous metatherians
FIGURE 7. Scatterplots of lnDNE versus lnRFI of NALK metatherians through time. Points represent species averages for each DTA metric. Time proceeds upward with the oldest time bin (pre-Aquilan) at the bottom and the youngest time bin (Lancian) at the top. Colored polygons are regions of the morphospace occupied by extant mammals in our dietary categories. Markers correspond to fossil groups. Abbreviations for diet categories: ado = animal-dominated omnivore; carn = carnivore; frug = frugivore; inv = invertivore; pdo = plant-dominated omnivore; sis = soft-invertebrate specialist.
FIGURE 3 in Dental ecomorphology and macroevolutionary patterns of North American Late Cretaceous metatherians
FIGURE 3. Bivariate scatter plots of log-transformed Dirichlet normal energy (lnDNE), relief index (lnRFI), and orientation patch count rotated (lnOPCR) values, and a 3D scatterplot of all three DTA metrics (bottom right) for our extant comparative sample. Shapes correspond to our assigned diet categorizations. See Table 2 for taxonomic names. Abbreviations for diet categories: ado = animal-dominated omnivore; carn = carnivore; frug = frugivore; inv = invertivore; pdo = plant-dominated omnivore; sis = soft-invertebrate specialist.
Figure 2. – A in Reevaluation of the Perciformes from the Late Cretaceous Marília Formation of Brazil and its confirmation as a Siluriformes
Figure 2. – A: Cross section of the dorsal ray showing the curl aspect of its perphery and the median canal (mc). B: Detail of the left basal side of the cross section showing several radial vascular canals (arrows). The asterisk points to an artefactual crack. C: Detail of the section showing the pseudolamellar bony tissue and the osteocytes especially in the upper left corner. D: Detail of the star-shaped osteocytes with their network of osteocytic canalicles. E: Detail of the ramified canalicles (arrows) in the bony matrix. Scale bars: A = 200 μm; B, C = 50 μm; D = 20 μm; E = 10 μm. In the original description of Gayet and Brito (1989), Perciformes was used in a large sense, a group considered as paraphyletic among the Percomorpha. Currently the Perciformes are defined as the clade formed by Percidae, Serranidae, Notothenioidei, Gasterosteidae, and the Scorpaeniformes (Betancur et al., 2017).
FIGURE 6 in Late Cretaceous Elopomorpha (Actinopterygii: Teleostei) from the Mahajanga Basin of Madagascar and impacts on paleobiogeography
FIGURE 6. Late Cretaceous Paleogeographic Map showing known fossil localities (clustered by state if applicable) of Albula, Egertonia, and Paralbula and the location of the Madagascar fauna. PaleoMap modified from global Molleweide projection at 66 Ma (Scotese, 2014). Localities are condensed by state or province in North America for clarity.
FIGURE 4 in Late Cretaceous Elopomorpha (Actinopterygii: Teleostei) from the Mahajanga Basin of Madagascar and impacts on paleobiogeography
FIGURE 4. Paralbula sp. fossils from the Maevarano Formation. A-B occlusal and lateral views of tooth plate (DMNH EPV.136304). C-D occlusal and lateral views of tooth plate (UA 11391). E-F, occlusal and lateral views of tooth plate (UA 11392). Scale bar equals 1 cm.
FIGURE 3 in Late Cretaceous Elopomorpha (Actinopterygii: Teleostei) from the Mahajanga Basin of Madagascar and impacts on paleobiogeography
FIGURE 3. Egertonia sp. fossils from the Maevarano Formation. A-B, occlusal and cross-section views of tooth plate (UA 11389). C-D, occlusal and cross-section views of tooth plate (DMNH EPV. 136302). E-F, occlusal and cross-section views of tooth plate (DMNH EPV.136303). G-I, occlusal, cross-section, and basal views of tooth plate (UA 11390). Scale bar equals 1 cm; small arrows used in cross-section view to highlight vertically stacked teeth.
FIGURE 1 in Late Cretaceous Elopomorpha (Actinopterygii: Teleostei) from the Mahajanga Basin of Madagascar and impacts on paleobiogeography
FIGURE 1. Geologic map of the Mahajanga Basin field area in northwestern Madagascar, including Berivotra and Lac Kinkony Study Areas. Modified with permission from Rogers et al. (2013).
FIGURE 34 in The osteology of the Late Cretaceous paravian Rahonavis ostromi from Madagascar
FIGURE 34. Tibiae of the holotype (UA 8656) of Rahonavis ostromi. In images (1-4), the right tibia is on the left and the left tibia is on the right. 1, cranial views; 2, lateral views; 3, caudal views; 4, medial views; 5, proximal view of left tibia; 6, distal view of left tibia. The cranial surface is facing the bottom of the image in both (5) and (6). Scale bar equals 1 cm. See Appendix for complete list of Morphosource links for mesh and stack data for tibiae. Abbreviations: cc, cnemial crest; es, extensor sulcus; fc, fibular crest; fcd, fibular condyle.
FIGURE 15 in The osteology of the Late Cretaceous paravian Rahonavis ostromi from Madagascar
FIGURE 15. CT slices through the sacrum of the holotype (UA 8656) of Rahonavis ostromi. CT slices (1) through (11) extend from the cranial to the caudal end of the sacrum; the position of each individual CT slice is shown in the left lateral view of the sacrum in (12). Scale bar equals 1 cm. Image in (12) not to same scale. Morphosource link to stack data: https://doi.org/10.17602/M2/M80144. Abbreviations: nc, neural canal; pnf, pneumatic fossa; sr, sacral spinal ridge; tvp, transverse process.
FIGURE 12 in The osteology of the Late Cretaceous paravian Rahonavis ostromi from Madagascar
FIGURE 12. Last dorsal vertebra of the holotype (UA 8656) of Rahonavis ostromi. 1, left lateral view; 2, right lateral view; 3, dorsal view (cranial to left); 4, ventral view (cranial to left); 5, cranial view; 6, caudal view. Scale bar equals 1 cm. Morphosource link to mesh file: https:// doi.org/10.17602/M2/M84077. Abbreviations: nc, neural canal; pf, pneumatic foramen.
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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.