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.
870
datasets available to search
ShareScore release 0.9.0
Dataset results
870 results for “Ordovician”
Fig. 1 in Sexual dimorphism and pore systems in Ordovician ostracodes
Fig. 1. Morphological terminology explained in Swantina pseudobliqua.
Fig. 4 in A spinose appendage fragment of a problematic arthropod from the Early Ordovician of Morocco
Fig. 4. Reconstruction of Pseudoangustidontus duplospineus gen. et sp. nov.
Fig. 2 in Concentrations of juvenile and small adult cephalopods in the Hirnantian cherts (Late Ordovician) of Porkuni, Estonia
Fig. 2. Sedimentology and stratigraphic division of the Porkuni section, Estonia.
Data for: Insights for modern invasion ecology from biotic changes of the Clarksville Phase of the Richmondian Invasion (Ordovician, Katian)
<p>The frequency of biotic invasions in modern ecosystems is increasing due to global trade moving taxa outside their native ranges and climate change facilitating establishment of taxa in previously inhospitable regions. Thus, developing a holistic understanding of biotic invasions and how they impact ecosystems over different timescales—from annual to geologic time scales—is vital. Herein we examine a geologically brief invasion event, the Clarksville Phase of the Richmondian Invasion. Prior analyses have established general ecological and evolutionary patterns across the entire Richmondian Invasion, but recent sequence stratigraphic refinement makes analysis of individual invasion pulses possible for the first time. We examine biotic change across the Clarksville Phase and identify invasion impacts on diversity, paleocommunity composition, and niche stability. Invader arrival and success were strongly linked to increased propagule pressure facilitated by sea level changes. Invaders initially colonized deep subtidal environments and then moved offshore facilitated by rapid niche evolution during the invasion interval. Invasive taxa that attained the largest population sizes belonged to previously underutilized ecological guilds. Overall, the introduction of the invasive taxa resulted in increased diversity that was maintained into the post-invasion interval accompanied by a change in community composition in which the invaders became dominant paleocommunity members. Combined these analyses document a biotic invasion facilitated by climate change which increased local diversity through invaders occupying underutilized ecospace and competition-related niche contraction on millennial time scales. Developing a long-term perspective to accompany shorter-term studies facilitates predicting the long-term impacts of modern invasions and creating better-informed policies and practices. </p>
Phylogeny of the Ordovician and Silurian members of the order Atrypida
<p><span>The brachiopod order Atrypida originated in the Middle Ordovician and went extinct in the Late Devonian. Few cladistic studies have been undertaken for this group. Here we investigate their early evolution through the Silurian time. We present a parsimony-based phylogenetic analysis of 41 characters and 70 genera representing all the early taxonomic groups within the order. The stratigraphic record of the fossil genera analysed here strongly supports the parsimony phylogeny. Most currently recognized subfamilies and families may be identified within clades, except for the Atrypinae, Idiospirinae, and the Septatrypidae. This warrants subdivision of the former and redefinition of the two latter. The subfamily Atrypinae is redefined and a new subfamily of the Atrypidae, the Protatrypinae is split off. Tracing character evolution across the tree indicates that calcified spiralia and a jugum or jugal processes characterize all members of the Atrypida, except the most basal clade, the Cyclospiridae, that lacks a calcified jugum. Ribs are a homoplasious character, occurring in numerous clades throughout the tree. Darriwillian through Sandbian was a time with rapid evolution when most new autapomorphies seen in the atrypides evolved. This interval is part of the Great Ordovician Biodiversification Event (GOBE). Solid teeth, dorsal direction of spiralia, elaborate ornamentation, and frills evolved in the latest Katian into early Silurian time. Solid teeth and dorsally directed spiralia, seen in distantly related clades from the latest Katian on, may be analogous features. The Late Ordovician Mass Extinction (LOME) is indicated in the stratigraphic tree together with a possible event at the end of Aeronian. The tree supports the long-held assumptions that the Plectatrypinae evolved from the Spirigerininae. It further suggests that the genus <em>Tuvaella</em> is included with the Davidsonioidea. Likewise, the redefined Atrypinae is a sister group of the Lissatrypidae and a derived group in the phylogenetic tree. </span></p>
Goryeocrinus pentagrammos n. gen. n. sp. (Rhodocrinitidae; Diplobathrida), the first record of camerate crinoid from the Middle Ordovician (Darriwilian) of South Korea (East Gondwana)
<p><em>Goryeocrinus</em> <em>pentagrammos</em> n. gen. n. sp. from the Jigunsan Formation of South Korea is described, which is the first diplobathrid record from Middle Ordovician (middle Darriwilian) of East Gondwana. Phylogenetic analyses suggest that <em>G</em>. <em>pentagrammos</em> is a member of the paraphyletic Rhodocrinitidae of the Diplobathrida and most closely related to <em>Paradiabolocrinus</em> from the Late Ordovician (Sandbian) of Laurentia. <em>G</em>. <em>pentagrammos</em> is characterized by having a pentameral, flat bowl-shaped calyx, conspicuous pentagrammatic ridge formed by bifurcated median ray ridge and pentagonal basal ridge, at least two interradials in the first row of regular interrays, and anitaxial ridge originating from CD interray but close to C ray radial, and lacking intrabrachials and interradials between secundibrachials. The occurrence of <em>G</em>. <em>pentagrammos</em> from South Korea (East Gondwana) drastically expands Ordovician paleogeographic range of the camerates which have otherwise been recorded from Laurentia, West Gondwana, Avalonia, and Baltica.</p>
Data from: Comparisons of Late Ordovician ecosystem dynamics before and after the Richmondian Invasion reveal consequences of invasive species in benthic marine paleocommunities
Open the record for dataset details and reuse information.
Data from: Late Ordovician and Early Silurian virgianid and stricklandioid brachiopods from North Greenland: Implications for a warm-water faunal province
Open the record for dataset details and reuse information.
A Hirnantian holdover from the late Ordovician mass extinction: phylogeny and biogeography of a new Anthracocrinid crinoid from Estonia
Open the record for dataset details and reuse information.
Data from: New taxa and revised stratigraphic distribution of the crinoid fauna from Anticosti Island, Québec, Canada (Late Ordovician-Early Silurian)
Open the record for dataset details and reuse information.
Late Ordovician brachiopods from east-central Alaska, northwestern margin of Laurentia
Open the record for dataset details and reuse information.
Data from: Katian (Late Ordovician) trilobites of the North Qilian Mountains and their palaeogeographical implications for the Proto-Tethys Archipelagic Ocean (PTAO)
Open the record for dataset details and reuse information.
Phylogeny of the Ordovician and Silurian members of the order Atrypida
Open the record for dataset details and reuse information.
Data from: Latest Ordovician (Hirnantian) brachiopod faunal lists used for non-matric multidimensional scaling (NMDS) and network analyses
Open the record for dataset details and reuse information.
Goryeocrinus pentagrammos n. gen. n. sp. (Rhodocrinitidae; Diplobathrida), the first record of camerate crinoid from the Middle Ordovician (Darriwilian) of South Korea (East Gondwana)
Open the record for dataset details and reuse information.
Shifting speciation mode and biogeographic patterns during the Late Ordovician (Sandbian-Katian) in Laurentian brachiopods (Atrypida, Anazygidae)
Open the record for dataset details and reuse information.
Data for: Insights for modern invasion ecology from biotic changes of the Clarksville Phase of the Richmondian Invasion (Ordovician, Katian)
Open the record for dataset details and reuse information.
Phylogenetic position and stratigraphic uncertainty of a new flexible crinoid from the Ordovician–Silurian boundary of Anticosti Island (Quebec, Canada)
Open the record for dataset details and reuse information.
Global factors constrain body size trends across the Great Ordovician Biodiversification Event at a regional scale: a case study from the Arbuckle Mountains of Oklahoma
Open the record for dataset details and reuse information.
Middle Ordovician (middle Darriwilian) Archaeospicularia and Entactinaria (radiolarians) from the Table Cove Formation, Piccadilly Quarry, western Newfoundland, Canada
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.