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139 results for “Early Paleocene”
FIG. 46 in Dental ontogeny in the early Paleocene placental mammal Alcidedorbignya inopinata (Pantodonta) from Tiupampa (Bolivia)
FIG. 46. — Correlation of the evolution of feeding and maternal investment in the juvenile eutherian mammals as illustrated by Langer (2008: fig. 2) with the dental stages (1 to 8) defined here and the IDAS of Anders et al. (2011).
FIG. 10. — A in Dental ontogeny in the early Paleocene placental mammal Alcidedorbignya inopinata (Pantodonta) from Tiupampa (Bolivia)
FIG. 10. — A, Transparent lateral view of left mandible (MHNC 8423) of juvenile Alcidedorbignya inopinata (stage 2) showing left m1 erupting and m2 in formation in crypt; B, the same in occlusal view; C, occlusal view of left m2 in crypt showing the trigonid with its three cusps partially formed but not completely fused in the centre of the trigonid basin and, posterior to the protoconid, the tip of a cusp interpreted as the hypoconid. Scale bars: A, B, 5 mm; C, 2 mm.
FIG. 11 in Dental ontogeny in the early Paleocene placental mammal Alcidedorbignya inopinata (Pantodonta) from Tiupampa (Bolivia)
FIG. 11. — Occlusal views of maxillae (stage 2) of juvenile Alcidedorbignya inopinata: A: left maxilla (MHNC 13948); B, right maxilla (MHNC 132949). Scale bar: 5 mm.
FIG. 9 in Dental ontogeny in the early Paleocene placental mammal Alcidedorbignya inopinata (Pantodonta) from Tiupampa (Bolivia)
FIG. 9. — Slices of the lateral CT-scan of the mandibles (MHNC 8423) of juvenile Alcidedorbignya inopinata (stage 2): A, B, slices (128, 109) of the left mandible (slice 109 is lateral to slice 128); C, slice 360 of the right mandible. The number for each illustrated slice refers to the position within the sequence of 699 images for A and B and 720 images for C (resolution binned images voxel size = 0.0159849 mm). Scale bar: 5 mm.
FIG. 7F-K in Dental ontogeny in the early Paleocene placental mammal Alcidedorbignya inopinata (Pantodonta) from Tiupampa (Bolivia)
FIG. 7F-K. — Partial skull and mandibles (MHNC 8423) of juvenile Alcidedorbignya inopinata (stage 2): F, lateral view of left mandible; G, occlusal view of left mandible; H, medial view of left mandible; I, Lateral view of right mandible; J, occlusal view of right mandible; K, medial view of right mandible. Scale bar: 5 mm.
FIG. 5 in Dental ontogeny in the early Paleocene placental mammal Alcidedorbignya inopinata (Pantodonta) from Tiupampa (Bolivia)
FIG. 5. — Left mandible (MHNC 13859) of juvenile Alcidedorbignya inopinata (stage 1): A, lateral view; B, C, slices no. 93 and 103 of the lateral CT-scan of the specimen; (slice 93 is lateral to slice 103); D, medial view; E, occlusal view; F, slice no. 140 of the lateral CT-scan of the specimen (slice 140 is medial to slice 103). The number for each illustrated slice refers to the position within the sequence of 213 images for A and D (resolution binned images voxel size = 0.02781842 mm). Scale bar: 10 mm.
FIG. 2 in Dental ontogeny in the early Paleocene placental mammal Alcidedorbignya inopinata (Pantodonta) from Tiupampa (Bolivia)
FIG. 2. — Perinatal partial skull and mandibles (MHNC 8373) of Alcidedorbignya inopinata (stage 1): A, left lateral view of the skull and left mandible; B, right lateral view of the skull and left mandible; C, dorsal view of the skull and left mandible; D, ventral view of the skull and left mandible; E, postcranial elements of the same individual; F, slice no. 194 of the scan of the skull and left mandible; G, Lateral view of the right mandible; H, medial view of the right mandible (lateral view); I, slice no. 107 of the CT-scan of the right mandible; I', enlargement showing the germ of p1 developing in the bottom of the crypt; J, slice no. 122 of the CT-scan of the right mandible (slice 122 is medial to slice 107); J', enlargement showing the germ of p1 developing in the bottom of the crypt; K, occlusal view of the right mandible. The number for each illustrated slice refers to the position within the sequence of 771images (resolution binned images voxel size = 0.01857481 mm) for F and 246 images for I and J. Scale bars: 10 mm.
FIG. 7A-E in Dental ontogeny in the early Paleocene placental mammal Alcidedorbignya inopinata (Pantodonta) from Tiupampa (Bolivia)
FIG. 7A-E. — Partial skull and mandibles (MHNC 8423) of juvenile Alcidedorbignya inopinata (stage 2): A, dorsal view of skull; B, ventral view of skull; C, enlargement of part of right palate; D, right lateral view of skull; E, left lateral view of skull. Scale bars: A-D, 5 mm; E, 2 mm.
FIG. 4. — A in Dental ontogeny in the early Paleocene placental mammal Alcidedorbignya inopinata (Pantodonta) from Tiupampa (Bolivia)
FIG. 4. — A, Transparent lateral view of left mandible (MHNC 8373) of juvenile Alcidedorbignya inopinata (stage 1) showing left m1 and the tip of a cusp of m2 in crypt (probably the protoconid); B, the same in occlusal view; C, occlusal view of left m1 in crypt and partial cusp tip of m2 (probably the protoconid). Scale bars: A, B, 5 mm; C, 2 mm.
FIG. 1 in Dental ontogeny in the early Paleocene placental mammal Alcidedorbignya inopinata (Pantodonta) from Tiupampa (Bolivia)
FIG. 1. — Correlation between the dental stage (1 to 8) defined here and the IDAS (Individual Dental Age Stages) of Anders et al. (2011).
FIG. 8 in Dental ontogeny in the early Paleocene placental mammal Alcidedorbignya inopinata (Pantodonta) from Tiupampa (Bolivia)
FIG. 8. — Slices of CT-scan of skull (MHNC 8423) of juvenile Alcidedorbignya inopinata (stage 2): A-D, slices (70, 121, 297, 529) of the frontal CT-scan (slice 70 is anterior and slice 529 is posterior); E, slice 593 of the coronal CT-scan. The number for each illustrated slice refers to the position within the sequence of 1630 images for A-D and 922 images for E (resolution binned images voxel size = 0.0159858 mm). Scale bar: 5 mm.
FIG. 3 in Dental ontogeny in the early Paleocene placental mammal Alcidedorbignya inopinata (Pantodonta) from Tiupampa (Bolivia)
FIG. 3. — Mandibles of the perinatal specimen (MHNC 8373) showing the crypt of m2 in formation with a cusp tip: A, left mandible; B, right mandible. The number for each illustrated slice refers to the position within the sequence of 772 images (resolution binned images voxel size = 0.01857481 mm) for A and 247 images (resolution binned images voxel size = 0.01857481 mm) for B. Scale bar: 2 mm.
FIG. 6. — A in Dental ontogeny in the early Paleocene placental mammal Alcidedorbignya inopinata (Pantodonta) from Tiupampa (Bolivia)
FIG. 6. — A, Transparent lateral view of left mandible (MHNC 13859) of juvenile Alcidedorbignya inopinata (stage 1) showing left m1 and the tip of a cusp of m2 in crypt (probably the protoconid); B, the same in occlusal view; C, occlusal view of left m1 in crypt and cusp tip of m2 interpreted here as the protoconid (the cusp has been slightly displaced and rotated clockwise c. 45°); D, occlusal view of the protoconid of m2 in its probable natural position. Scale bars: A, B, 5 mm; C, 2 mm.
Data from: Early Paleocene tropical forest from the Ojo Alamo Sandstone, San Juan Basin, New Mexico, USA
Earliest Paleocene megafloras from North America are hypothesized to be low diversity and dominated by long-lived cosmopolitan species following the Cretaceous-Paleogene (K/Pg) mass extinction. However, megafloras used to develop this hypothesis are from the Northern Great Plains of North America, and relatively little is known about floras from southern basins. Here, we present a quantitative analysis of an earliest Paleocene megaflora (<350 kyr after K/Pg boundary) from the Ojo Alamo Sandstone in the San Juan Basin (SJB), New Mexico. The megaflora, comprised of 53 morphotypes, was dominated by angiosperms, with accessory taxa composed of pteridophytes, lycophytes, and conifers. Diversity analyses indicate a species rich, highly uneven, and laterally heterogeneous flora. Paleoclimate estimates using multivariate and univariate methods indicate warm temperatures and relatively high precipitation consistent with a modern tropical seasonal forest. When compared to contemporaneous floras from the Denver Basin (DB) of Colorado and the Williston Basin (WB) of North Dakota, the SJB flora had significantly higher species richness but lower evenness. Paleoclimate estimates from the SJB were 7-14 °C warmer than the DB and WB, indicating a shift from a temperate forest in the Northern Great Plains to a tropical forest in the SJB. These results demonstrate the presence of a latitudinal floral diversity and paleoclimatic gradient during the earliest Paleocene in western North America. We hypothesize that the warm, wet conditions in the earliest Paleocene SJB drove rapid rates of speciation following the K/Pg boundary resulting in a diverse and heterogenous flora.
High Arctic late Paleocene and early Eocene dinoflagellate cysts; dinocyst results from IODP Expedition 302 (ACEX)
<p>This dataset includes the raw palynological data, notably dinoflagellate cyst assemblages, including 38 plates with high-resolution light microscope photos and 3 plates with SEM photos, from upper Paleocene and lower Eocene strata recovered from Lomonosov Ridge, Arctic Ocean, during IODP Expedition 302 (2004). The dataset forms the basis this publication: Appy Sluijs and Henk Brinkhuis, 2024: High Arctic late Paleocene and early Eocene dinoflagellate cysts . Journal of Micropaleontology 43 (2), 441-474. doi:10.5194/jm-43-441-2024.</p> <p>Please use Version 4 for all of the datasets.</p>
FIG 8400 in Dental ontogeny in the early Paleocene placental mammal Alcidedorbignya inopinata (Pantodonta) from Tiupampa (Bolivia)
FIG 8400
Data from: Early Paleocene tropical forest from the Ojo Alamo Sandstone, San Juan Basin, New Mexico, USA
Open the record for dataset details and reuse information.
Data from: Chloroplast phylogenomic data support Paleocene - Eocene amphi-Pacific early radiation for the Asian Palmate core Araliaceae
Traditional phylogenies based on analysis of multiple genes have failed to obtain a well-resolved evolutionary history for the backbone of the Asian Palmate group of Araliaceae, the largest clade of the family. In this study we applied the genome skimming approach of next-generation sequencing to address whether the lack of resolution at the base of the Asian Palmate tree is due to molecular sampling error or the footprint of an ancient radiation. Twenty-nine complete plastid genomes of Araliaceae (17 newly sequenced) were analyzed (RAxML, Beast, Lagrange, BioGeoBears) to provide the first phylogenomic reconstruction of the group (95% of genera included). As a result, the early divergences of the Asian Palmate group have been clarified but the backbone of its core is not totally resolved, with short internal branches pointing to an ancient radiation scenario. East Asia is inferred as the most likely ancestral area for the Asian Palmate group (early Upper Cretaceous and the Paleocene) from which an early colonization of the Neotropics is inferred during the late Paleocene – early Eocene. The radiation of the core took place during the Paleocene – early Eocene, most likely in the context of the Boreotropical hypothesis. Recurrent episodes of southward migration (to the tropics) coupled with northern latitude local extinctions (promoting lineages geographic isolation) and northward expansion (promoting lineages contact that erased the trace of preceding geographic isolation) are hypothesized to have linked to the alternation of the cold and warm periods of the Eocene.
FIGURE 7 in A new side-neck turtle (Pelomedusoides: Bothremydidae) from the Early Paleocene (Danian) Maria Farinha Formation, Paraíba Basin, Brazil
FIGURE 7. Phylogenetic tree of crown pleurodiran based on the strict consensus of 24 most parsimonious cladograms superimposed on a geological timescale. Geochronology ages (in Ma) and abbreviations based on 2003' ICS Chart. Nodes I and II represent vicariance events (see Gaffney et al., 2010) (modified from Romano et al., 2014).
FIGURE 5 in A new side-neck turtle (Pelomedusoides: Bothremydidae) from the Early Paleocene (Danian) Maria Farinha Formation, Paraíba Basin, Brazil
FIGURE 5. Plastrons of some side-necked turtle species. All in ventral view and not too scale. (A) Inaechelys pernambucensis (DGEO-CTG-UFPE 6174); (B) Rosasia soutoi; (C) Taphrophys congolensis; (D) Chedighaii barberi; (E) Elochelys convenarum; (F) Puentemys mushaisaensis; (G) Cearachelys placidoi; (H) Foxemys mechinorum; (I) Bairdemys venezuelensis; (J) Portezueloemys patagonica; (K) Bauruemys elegans; (L) Peltocephalus dumerilianus; (M) Euraxemys essweini; and (N) Araripemys barretoi.
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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)
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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.