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33 results for “Ancient History”
Data from: Pleistocene diversification in an ancient lineage: a role for glacial cycles in the evolutionary history of Dioon Lindl. (Zamiaceae).
Premise of the study: Recent estimates of crown ages for cycad genera (Late Miocene) challenge us to consider what processes have produced the extant diversity of this ancient group in such relatively little time. Pleistocene climate change has driven major shifts in species distributions in Mexico and may have led to speciation in the genus Dioon by forcing populations to migrate up in elevation thereby becoming separated by topography. Methods: We inferred orthologs from transcriptomes of five species and sequenced these in 42 individuals representing all Dioon species. From these data and published plastid sequences we inferred dated species trees and lineage-specific diversification rates. Key results: 84 nuclear orthologs and plastid data confirm four major clades within Dioon, all of Pleistocene age. Gene tree analysis, divergence dates, and an increase in diversification rate support very recent and rapid divergence of extant taxa. Conclusions: This study confirms the Pleistocene age of Dioon species and implicates Pleistocene climate change and established topography in lineage spitting. These results add to our understanding of the cycads as evolutionarily dynamic lineages, not relicts or evolutionary dead ends. We also find that well-supported secondary calibration points can be reliable in the absence of fossils. Our hypothesis of lineage splitting mediated by habitat shifts may be applicable to other taxa that are restricted to elevation specific ecotones.
Data from: Ancient collagen reveals evolutionary history of the endemic South American 'ungulates'
Since the late eighteenth century, fossils of bizarre extinct creatures have been described from the Americas, revealing a previously unimagined chapter in the history of mammals. The most bizarre of these are the 'native' South American ungulates thought to represent a group of mammals that evolved in relative isolation on South America, but with an uncertain affinity to any particular placental lineage. Many authors have considered them descended from Laurasian 'condylarths', which also includes the probable ancestors of perissodactyls and artiodactyls, whereas others have placed them either closer to the uniquely South American xenarthrans (anteaters, armadillos and sloths) or the basal afrotherians (e.g. elephants and hyraxes). These hypotheses have been debated owing to conflicting morphological characteristics and the hitherto inability to retrieve molecular information. Of the 'native' South American mammals, only the toxodonts and litopterns persisted until the Late Pleistocene–Early Holocene. Owing to known difficulties in retrieving ancient DNA (aDNA) from specimens from warm climates, this research presents a molecular phylogeny for both Macrauchenia patachonica (Litopterna) and Toxodon platensis (Notoungulata) recovered using proteomics-based (liquid chromatography–tandem mass spectrometry) sequencing analyses of bone collagen. The results place both taxa in a clade that is monophyletic with the perissodactyls, which today are represented by horses, rhinoceroses and tapirs.
Data from: Range-wide multilocus phylogeography of the red fox reveals ancient continental divergence, minimal genomic exchange, and distinct demographic histories
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Data from: Eggshell palaeogenomics: Palaeognath evolutionary history revealed through ancient nuclear and mitochondrial DNA from Madagascan elephant bird (Aepyornis sp.) eggshell
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Data from: Pleistocene diversification in an ancient lineage: a role for glacial cycles in the evolutionary history of Dioon Lindl. (Zamiaceae).
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Data from: Ancient collagen reveals evolutionary history of the endemic South American ‘ungulates’
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Data from: Ancient mitochondrial genomes clarify the evolutionary history of New Zealand’s enigmatic acanthisittid wrens
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Figure 1 in The Iberian Peninsula: ancient history of a hot spot of mite harvestmen (Arachnida: Opiliones: Cyphophthalmi: Sironidae) diversity
Figure 1. Satellite view centered on the Iberian Peninsula showing the known localities for the Iberian species of Cyphophthalmi. Type localities are identified with the bold font. An asterisk denotes the localities of the specimens used in the molecular study. Localities identified as 'Paramiopsalis sp.' are based on specimens listed by Rambla & Fontarnau (1984) as Paramiopsalis ramulosus, but have not been examined by the authors. The type locality for Parasiro coiffaiti is indicated with a question mark because the locality listed for the type material is not from the Girona Province (see Results).
Figure 6 in The Iberian Peninsula: ancient history of a hot spot of mite harvestmen (Arachnida: Opiliones: Cyphophthalmi: Sironidae) diversity
Figure 6. Paramiopsalis eduardoi sp. nov., scanning electron microgarphs of a male paratype. A, right chelicera. B, cheliceral fingers. C, left pedipalp. D, pedipalpal claw.
Data from: Integrating fossils, phylogenies, and niche models into biogeography to reveal ancient evolutionary history: the case of Hypericum (Hypericaceae)
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THE ANCIENT HISTORY OF UZBEK TRADITIONAL CLOTHING.
<p><em><span>The traditional clothing of Uzbekistan, known as "O'zbek milliy liboslari," has a rich and ancient history that reflects the cultural diversity and heritage of the region. These garments, which have evolved over centuries, are characterized by their intricate designs, vibrant colors, and the use of luxurious fabrics such as silk and cotton. Traditional Uzbek clothing is not only a symbol of national identity but also a testament to the skilled craftsmanship of Uzbek artisans. The history of these garments is closely tied to the social, economic, and political changes that have shaped Uzbekistan. Key elements of traditional attire include the chapan (a type of coat), the doppi (a traditional hat), and various styles of dresses and trousers adorned with beautiful embroidery. This annotation explores the evolution of Uzbek traditional clothing, its cultural significance, and its role in contemporary fashion.</span></em></p>
Sex-specific phenotypic effects and evolutionary history of an ancient polymorphic deletion of the human growth hormone receptor
GEO Series GSE171716. Mus musculus. 40 samples. Type: Expression profiling by high throughput sequencing.
Ancient mitogenomes from Neolithic, Megalithic and Medieval burials suggest complex genetic history of Kashmir valley, India
<p>Complete mitogenomes of the Neolithic and Megalithic burial sites in Kashmir valley, India in the fasta format.</p>
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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.