Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
8
datasets available to search
ShareScore release 0.9.0
Dataset results
8 results for “overwater dispersal”
Global diversification of Anelosimus spiders driven by long distance overwater dispersal and Neogene climate oscillations
Vicariance and dispersal events, combined with intricate global climatic history, have left an imprint on the spatiotemporal distribution and diversity of many organisms. Anelosimus cobweb spiders (Theridiidae), are solitary-social organisms with a cosmopolitan distribution in temperate- to-tropical areas. Their evolutionary history and the discontinuous distribution of species richness suggest that 1) long distance overwater dispersal, and 2) climate change during the Neogene (23–2.6 Ma), may be major factors in explaining their distribution and diversification. Here we test these hypotheses, and explicitly test if global Miocene/Pliocene climatic cooling in the last 8 Ma affected Anelosimus radiation in parallel in South America and Madagascar. To do so, we investigate the phylogeny and spatiotemporal biogeography of Anelosimus through a culmination of a 20-year comprehensive global sampling at the species level (69 species, including 84% of the known 75 species worldwide, represented by 268 individuals) using nucleotide data from seven loci (5.5 kb). Our results strongly support the monophyly of Anelosimus with an Oligocene (~30 Ma) South American origin. Major clades on other continents originate via multiple, long-distance dispersal events, of solitary or subsocial—but not social—lineages, from the Americas. These intercontinental dispersals were to Africa, Madagascar (twice), and SE Asia/Australasia. The early diversification of Anelosimus spiders coincides with a sudden thermal increase in the late Oligocene (~27–25 Ma), though no causal connection can be made. Our results, however, strongly support the hypothesis that global Neogene climatic cooling in the last 8 Ma drove Anelosimus radiation in parallel in S. America and Madagascar, offering a rare empirical evidence for diversification of a socially diverse group driven by an interplay between long distance dispersal and global Neogene climatic changes.
Figure 2 in Fossil frogs (Eleutherodactylidae: Eleutherodactylus) from Florida suggest overwater dispersal from the Caribbean by the Late Oligocene
Figure 2. Images derived from microCT scans of fossil ilia, sacrum and urostyle of Eleutherodactylus from Florida with anatomical nomenclature. A, right ilium (UF-VP-501355) in dorsal (upper), medial (middle) and lateral (bottom) views; B, right ilium (UF-VP-501352) in dorsal (upper), medial (middle) and lateral (bottom) views; C, sacrum (UF-VP-497977) in anterior (upper), dorsal (second), posterior (third) and ventral (bottom) views; D, urostyle (UF-VP-501321) in anterior (upper), dorsal (middle) and lateral (bottom). Anatomical abbreviations: acf, acetabular fossa; acr, acetabular rim; act, anterior cotyle; cnt, centrum; dae, dorsal acetabular expansion; dcn, dorsal canal; dcr, dorsal crest; dph, diapophysis; dpm, dorsal prominence; dpt, dorsal protuberance; dsp, dorsal spine; nac, neural arch; nsp, neural spine; paz, preacetabular zone; pcd, posterior condyle; pzy, prezygapophyses; saf, supraacetabular fossa; vae, ventral acetabular expansion.
Figure 1 in Fossil frogs (Eleutherodactylidae: Eleutherodactylus) from Florida suggest overwater dispersal from the Caribbean by the Late Oligocene
Figure 1. Biogeography of modern and extinct native North American anurans. A, time-calibrated family-level phylogeny with historical biogeographic reconstructions from Feng et al. (2017), including our additions of the extinct families Gobiatidae and Palaeobatrachidae based on phylogenetic hypotheses of Chen et al. (2016) and Cannatella (2015). Symbols with numbers on branches indicate the first appearance datum (FAD; Supporting Information, Table S1) for lineages in the fossil record of North America and are indicated on maps on the right. Families present today in North America are in bold. Symbols at the end of each branch indicate the extant distribution of the family. B, maps showing the palaeobiogeography of anurans in North America, including all fossil occurrences with taxonomic information to the family level. Fossil occurrences not assigned to family or a larger clade, 'incertae sedis', were excluded and are shown in the Supporting Information (Fig. S1; Table S1). Temporal and geographic range of fossils was derived from The Paleobiology Database (PBDB 2023).
Figure 5 in Fossil frogs (Eleutherodactylidae: Eleutherodactylus) from Florida suggest overwater dispersal from the Caribbean by the Late Oligocene
Figure 5. Results of linear and geometric morphometric analyses in Eleutherodactylus. A, correlation of Eleutherodactylus body size (snout–urostyle length, SUL) with width of the pre-acetabulum of the ilium of two species and 30 individuals illustrating intraspecific variation. B, correlation of Eleutherodactylus body size (snout–urostyle length, SUL) with width of the pre-acetabulum of the ilium and 27 species of five subgenera illustrating interspecific variation. Estimated size of fossils plotted on the regression line. A, B, show the best linear regressions to estimate body size (SUL) from extant Eleutherodactylus, additional linear regression in the Supporting Information (Fig. S7). C–F, results of 3D geometric morphometric analysis of 14 landmarks on the humerus of Eleutherodactylus showing (C) intraspecific and (D) interspecific shape variation on the humeri of extant species only and (E) intraspecific and (F) interspecific shape variation including fossils from the Late Oligocene of Florida.
Figure 4 in Fossil frogs (Eleutherodactylidae: Eleutherodactylus) from Florida suggest overwater dispersal from the Caribbean by the Late Oligocene
Figure 4. Comparisons between fossil Eleutherodactylus from Florida and isolated bones from other frog families from Florida. Images derived from microCT-scans. A, fossil Eleutherodactylus in the leftmost column: right humerus (UF-VP-501310); right radioulna (UF-VP-501323); sacrum (UF-VP-497977); urostyle (UF-VP-501321); right ilium (UF-VP-501355). B–H, specimens of extant species representing taxa present in Florida today or in the Oligocene. Additional species used for comparison are available in the Supporting Information (Figs S2, S4, Table S2) (Morphosource project ID: 000421780).
Figure 3 in Fossil frogs (Eleutherodactylidae: Eleutherodactylus) from Florida suggest overwater dispersal from the Caribbean by the Late Oligocene
Figure 3. Images derived from microCT scans of fossil humeri and radioulna of Eleutherodactylus from Florida with anatomical nomenclature. A, left humerus (reflected, UF-VP-501328) in lateral (first column), ventral (second column), medial (third column), and dorsal (fourth column) views; B, right humerus (UF-VP-501310), broken proximally, in lateral (first column), ventral (second column), medial (third column), and dorsal (fourth column) views; C, right radioulna (UF-VP-501323), broken distally, in proximal (first column), medial (second column), ventral (third column), lateral (fourth column), and dorsal (fifth column) views. Anatomical abbreviations: cap, capitulum; cra, crista radialis; hh, humeral head; lsu, longitudinal sulcus; ocs, olecranon scar; olc, olecranon; rad, radius; rep, radial epicondyle; uln, ulna; upe, ulnar epicondyle.
Figure 6 in Fossil frogs (Eleutherodactylidae: Eleutherodactylus) from Florida suggest overwater dispersal from the Caribbean by the Late Oligocene
Figure 6. Extant and fossil distribution of the genus Eleutherodactylus. Distribution of the five extant subgenera [distribution data of extant species from IUCN Red List under the search term Eleutherodactylus (IUCN 2019)], and fossil occurrences of the genus (references for fossil occurrences in the Supporting Information, Table S7).
Global diversification of Anelosimus spiders driven by long distance overwater dispersal and Neogene climate oscillations
Open the record for dataset details and reuse information.
ScienceDex guides
Understand access before you commit
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.