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.
4
datasets available to search
ShareScore release 0.9.0
Dataset results
4 results for “Megalobrachium”
Marine species formation along the rise of Central America: the anomuran crab Megalobrachium
<p>The evolution of marine neotropical shallow water species is expected to have been greatly affected by physical events related to the emergence of the Central American Isthmus. The anomuran crab<i> Megalobrachium</i>, a strictly neotropical porcellanid genus, consists of four species in the West Atlantic (WA) and nine in the East Pacific (EP). Dispersal is limited to a relatively short planktonic phase, which lasts approximately two weeks. We obtained DNA sequences of three mitochondrial and two nuclear genes of all but one species of <i>Megalobrachium</i> to construct a time-calibrated phylogeny of the genus and its historical phylogeography, based on the reconstruction of ancestral areas. The topology of the phylogenetic trees of <i>Megalobrachium</i> produced by Bayesian Inference (BI) and Maximum Likelihood (ML) were virtually congruent. The genus is monophyletic with respect to other porcellanids. Ancestral area reconstruction indicates that it arose in the eastern Pacific 18 million years ago and diversified into at least 13 species that are currently formally recognized and three additional species indicated by our data. Most morphological variation appears to have followed phylogenetic differentiation, though some cryptic speciation has also occurred. Four geminate clades in this genus implicate the gradual emergence of the Central American Isthmus in this diversification, but events preceding the final separation of the oceans as well as within-ocean events after the cessation of water connections were also important.</p>
FIGURE 7. Megalobrachium garthi Haig, 1957 in An annotated and illustrated checklist of the porcelain crabs of Panama (Decapoda: Anomura)
FIGURE 7. Megalobrachium garthi Haig, 1957: extra-limital specimen, male (cl 3.4 mm, cw 3.1 mm) from Los Negritos off Bahía Málaga, Colombia (CRBM-UV-cr:2009-107), dorsal view [photograph by AA].
FIGURE 8. Megalobrachium mortenseni Haig, 1962 in An annotated and illustrated checklist of the porcelain crabs of Panama (Decapoda: Anomura)
FIGURE 8. Megalobrachium mortenseni Haig, 1962: A, B, male (cl 4.0 mm, cw 4.0 mm) from Bocas del Toro, Panama (MZUSP 33481), dorsal (A) and ventral (B) views [photographs by AA].
Marine species formation along the rise of Central America: the anomuran crab Megalobrachium
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.