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.
1,021
datasets available to search
ShareScore release 0.9.0
Dataset results
1,021 results for “freshwater crab”
Figure 12 in Phylogenetic analysis of the Mexican freshwater crabs of the tribe Pseudothelphusini (Decapoda: Brachyura: Pseudothelphusidae)
Figure 12. Map of the Pacific slope of Mexico, showing the distribution of a group of species of Pseudothelphusa in which the distal lobe of the caudo-marginal process of the gonopod changes from a well-developed tooth (F, G) to a series of denticles or a smooth surface (A–E, H). A, Pseudothelphusa sonorensis, Alamos, Sonora. B, Pseudothelphusa rechingeri, Elota, Sinaloa. C, Pseudothelphusa lophophallus, San Antonio, Durango. D, Pseudothelphusa peyotensis, Peyotán, Nayarit. E, Pseudothelphusa nayaritae, San Blás, Nayarit. F, Pseudothelphusa leiophrys, Colima, Colima. G, Pseudothelphusa terrestris, Guadalajara, Jalisco. H, Pseudothelphusa jouyi, Chapala, Jalisco. The grey arrows point to the distal lobe of the caudo-marginal process of the gonopod.
Figure 11 in Phylogenetic analysis of the Mexican freshwater crabs of the tribe Pseudothelphusini (Decapoda: Brachyura: Pseudothelphusidae)
Figure 11. Map of the Isthmus of Tehuantepec, Mexico, showing the distribution of the species of Tehuana with a reduced (A–C) and a well-developed (D–H) mesial process of the gonopod. A, Tehuana complanata, Amatlán, Veracruz. B, Tehuana jacatepecensis, Jacatepec, Oaxaca. C, Tehuana lamellifrons, Tehuantepec, Oaxaca. D, Tehuana diabolis, Catemaco, Veracruz. E, Tehuana poglayenorum, Biological Station Los Tuxtlas, Veracruz. F, Tehuana veracruzana, Eyipantla, Veracruz. G, Tehuana chontalpaensis, Carlos A. Madrazo, Tabasco. H, Tehuana lamothei, Ixtacomitán, Chiapas. The grey arrows point to the mesial process of the gonopod.
Figure 10 in Phylogenetic analysis of the Mexican freshwater crabs of the tribe Pseudothelphusini (Decapoda: Brachyura: Pseudothelphusidae)
Figure 10. Map showing the distribution in Mexico of the tribes Hypolobocerini, Potamocarcinini, and Pseudothelphusini.
Figure 9 in Phylogenetic analysis of the Mexican freshwater crabs of the tribe Pseudothelphusini (Decapoda: Brachyura: Pseudothelphusidae)
Figure 9. One of the ten most parsimonious trees obtained for the tribe Pseudothelphusini: numbers correspond to clades discussed in the text.
Figure 8 in Phylogenetic analysis of the Mexican freshwater crabs of the tribe Pseudothelphusini (Decapoda: Brachyura: Pseudothelphusidae)
Figure 8. Strict consensus of ten most parsimonious trees: length = 434 steps; consistency index, CI = 0.38; retention index, RI = 0.62.
Figure 7 in Phylogenetic analysis of the Mexican freshwater crabs of the tribe Pseudothelphusini (Decapoda: Brachyura: Pseudothelphusidae)
Figure 7. Details of the complete tree obtained for the tribe Pseudothelphusini, showing alternative arrangements of the species of Pseudothelphusa. A, Disparithelphusa pecki is the sister taxon of Pseudothelphusa nelsoni and Pseudothelphusa parabelliana. B, Pseudothelphusa dilatata and Pseudothelphusa seiferti are sister species. C, the position of Pseudothelphusa morelosis changes. D, Disparithelphusa pecki and P. parabelliana are sister species.
Figure 5 in Phylogenetic analysis of the Mexican freshwater crabs of the tribe Pseudothelphusini (Decapoda: Brachyura: Pseudothelphusidae)
Figure 5. One of the ten most parsimonious trees obtained for the tribe Pseudothelphusini: branches appear with the character number above and character state below.
Figure 3 in Phylogenetic analysis of the Mexican freshwater crabs of the tribe Pseudothelphusini (Decapoda: Brachyura: Pseudothelphusidae)
Figure 3. First male gonopod terminology for species of the tribe Pseudothelphusini. A, lateral view; B, caudal view.
Figure 2 in Phylogenetic analysis of the Mexican freshwater crabs of the tribe Pseudothelphusini (Decapoda: Brachyura: Pseudothelphusidae)
Figure 2. First male gonopod terminology for species of the tribe Pseudothelphusini. A, mesial view; B, cephalic view.
FIGURE 7. Right G2 in Redescriptions of three species of freshwater crabs from Angola, southern Africa (Brachyura: Potamoidea: Potamonautidae)
FIGURE 7. Right G2 ventral view (A–C); (A) Potamonautes adeleae Bott, 1968, paratype, adult ♂ CW 55.3 mm, from Lunda Norte Province, Angola (SMF 4444); (B) Potamonautes kensleyi Cumberlidge & Tavares, 2006, adult male CW 35.4 mm, from the Cuanza River, Soxujwa, Kekere, Malanje Province, Angola (AMG GEN 1887A); (C) Potamonautes macrobrachii Bott, 1953, holotype, adult ♂ CW 32.9 mm, from Huamba Province, Angola (SMF 1892). Photograph C by Theo Busschau, University of Stellenbosch, South Africa. Scale bar: A = 5.6 mm; B = 2.3 mm; C = 1.2 mm.
FIGURE 6. Right G1 in Redescriptions of three species of freshwater crabs from Angola, southern Africa (Brachyura: Potamoidea: Potamonautidae)
FIGURE 6. Right G1, ventral view (A–C) and dorsal view (D, F). (A, D) Potamonautes adeleae Bott, 1968, paratype, adult ♂ CW 55.3 mm, from Lunda Norte Province, Angola (SMF 4444); (B, E) Potamonautes kensleyi Cumberlidge & Tavares, 2006, adult male CW 35.4 mm, from the Cuanza River, Soxujwa, Kekere, Malanje Province, Angola (AMG GEN 1887A); (C, F) Potamonautes macrobrachii Bott, 1953, holotype, adult ♂ CW 32.9 mm, from Huamba Province, Angola (SMF 1892). Photo- graphs B and E by Theo Busschau, University of Stellenbosch, South Africa. Scale bar: A= 6.7 mm; B = 2.3 mm; C = 1.13 mm; D = 2.7 mm; E = 2.3 mm; F = 1.2.
FIGURE 4 in Redescriptions of three species of freshwater crabs from Angola, southern Africa (Brachyura: Potamoidea: Potamonautidae)
FIGURE 4. Frontal view of carapace. (A) Potamonautes adeleae Bott, 1968, paratype, adult ♂ CW 55.3 mm, from Lunda Norte Province, Angola (SMF 4444); (B) Potamonautes kensleyi Cumberlidge & Tavares, 2006, adult male CW 35.4 mm, from the Cuanza River, Soxujwa, Kekere, Malanje Province, Angola (AMG GEN 1887A); (C) Potamonautes macrobrachii Bott, 1953, paratype, adult ♂ CW 32.9 mm, from Huamba Province, Angola (SMF 1892). Photograph B by Theo Busschau, University of Stellenbosch, South Africa. Scale bar: A = 10.4 mm; B = 5.7 mm; C = 4.7 mm.
FIGURE 3. Potamonautes macrobrachii Bott, 1953 in Redescriptions of three species of freshwater crabs from Angola, southern Africa (Brachyura: Potamoidea: Potamonautidae)
FIGURE 3. Potamonautes macrobrachii Bott, 1953, holotype, adult ♂ CW 32.9 mm, from Huamba Province, Angola (SMF 1892). Whole animal, dorsal view (A), whole animal, ventral view (B). Scale bars: A = 12.5 mm, B = 5.38 mm.
FIGURE 5 in Redescriptions of three species of freshwater crabs from Angola, southern Africa (Brachyura: Potamoidea: Potamonautidae)
FIGURE 5. (A–F) Frontal view of right and left chela; (G–L) cheliped merus and carpus. (A, B) Potamonautes adeleae Bott, 1968, paratype, adult ♂ CW 55.3 mm, from Lunda Norte Province, Angola (SMF 4444); (C, D) Potamonautes kensleyi Cumberlidge & Tavares, 2006, adult male CW 35.4 mm, from the Cuanza River, Soxujwa, Kekere, Malanje Province, Angola (AMG GEN 1887A); (E, F) Potamonautes macrobrachii Bott, 1953, holotype, adult ♂ CW 32.9 mm, from Huamba Province, Angola (SMF 1892); (G, H) Potamonautes adeleae Bott, 1968, paratype, adult ♂ CW 55.3 mm, from Lunda Norte Province, Angola (SMF 4444); (G) ventral view of right chela merus; (H) dorsal view of right chela carpus and merus; (I, J) Potamonautes kensleyi Cumberlidge & Tavares, 2006, adult male CW 35.4 mm, from the Cuanza River, Soxujwa, Kekere, Malanje Province, Angola (AMG GEN 1887A) (I) ventral view of right chela merus; (J) dorsal view of right chela merus and carpus; (K, L) Potamonautes macrobrachii Bott, 1953, holotype, adult ♂ CW 32.9 mm, from Huamba Province, Angola (SMF 1892): (K) ventral view of right chela merus; (L) dorsal view of right chela merus and carpus;. Photographs C, D, I, J by Theo Busschau, University of Stellenbosch, South Africa. Scale bar: A = 18.4 mm; B = 17.9 mm; C, D = 8.9 mm; E = 8.33 mm; F = 5.81 mm; G = 17.9 mm; H = 7.3 mm; I = 8.9 mm; J = 5.9 mm; K = 5.81 mm; L = 5.6 mm.
FIGURE 1. Potamonautes adeleae Bott, 1968 in Redescriptions of three species of freshwater crabs from Angola, southern Africa (Brachyura: Potamoidea: Potamonautidae)
FIGURE 1. Potamonautes adeleae Bott, 1968, paratype, adult ♂ CW 55.3 mm, from Lunda Norte Province, Angola (SMF 4444). Whole animal, dorsal view (A), whole animal, ventral view (B). Scale bars: A = 10.17 mm, B = 10 mm.
FIGURE 2 in Redescriptions of three species of freshwater crabs from Angola, southern Africa (Brachyura: Potamoidea: Potamonautidae)
FIGURE 2. Potamonautes kensleyi Cumberlidge & Tavares, 2006, adult male CW 35.4 mm, from the Cuanza River, Soxujwa, Kekere, Malanje Province, Angola (AMG GEN 1887A). Whole animal, dorsal view (A), whole animal, ventral view (B). Photographs by T. Busschau, University of Stellenbosch, South Africa. Scale bars: A = 12.0 mm, B = 12.2 mm.
Regional climates shape the biogeographic history of a broadly distributed freshwater crab species complex
<p>Aim: The evolutionary importance of paleoclimate regimes has been noted in biogeographic studies. However, little is known about how paleoclimate differences shaped the biogeographic pattern and diversification history of the freshwater fauna in important zoogeographical boundary regions. Here, we aim to investigate how past regional climatic differences have shaped the biogeographic history of the inland aquatic fauna in China using an endemic freshwater crab species complex found on both sides of the Qinling Mountains–Huaihe River Line (QHL), a critical ecological boundary in eastern China, as a model system.</p> <p>Location: Eastern China, the Qinling Mountains–Huaihe River Line.</p> <p>Taxon: The <em>Sinopotamon yangtsekiense</em> species complex.</p> <p>Methods: A total of 482 individuals of <em>Sinopotamon yangtsekiense</em> sensu lato were collected from 34 localities throughout its entire distributional range. The phylogeographic analyses of population structure, morphological and genetic variations, and demographic dynamics were made based on multiple mtDNA and nuDNA loci and on morphological traits. Fine-tuned ecological niche modeling was used to reconstruct the location of climatically suitable areas that existed during the Last Glacial Maximum.</p> <p>Results: The divergence of two freshwater crab lineages across the QHL correlated with significant past variations in monsoon intensity and with the location of multiple refuges. The divergence time was broadly consistent with the timing of the critical paleoclimate transition event in the mid-Pleistocene (95% HPD, 0.48–1.06 Ma). Each freshwater crab lineage has evolved distinct male genital traits associated with their isolation in areas with different precipitation rates and temperatures in the past. The patterns of crab distribution observed today reflect past contractions of the two lineages in response to glacial and interglacial cycles during the Pleistocene, followed by their subsequent rapid expansion after the Last Glacial Maximum (~15 kya).</p> <p>Main conclusions: Populations of the widespread species <em>Sinopotamon yangtsekiense</em> s.l. experienced a deep division in the past that led to the phylogeographical isolation observed today. The two main drivers of genetic isolation in this taxon were (a) differences in the intensity of the monsoons on each side of the QHL boundary during the mid-Pleistocene, and (b) isolation of different populations of <em>S. yangtsekiense</em> s.l. in a number of separate refuges during the LGM.</p>
FIGURE 2. A, C, E in The identity of the Sarawak freshwater crab Parathelphusa oxygona Nobili, 1901, with description of a new species, Parathelphusa nobilii, from Western Kalimantan, Indonesia, Borneo (Crustacea: Brachyura: Gecarcinucidae)
FIGURE 2. A, C, E, Parathelphusa oxygona Nobili, 1901, male (36.6×28.0 mm) (ZRC 1992.10546), Serian, Sarawak; B, D, F, Parathelphusa nobilii sp. nov., holotype male (38.5×29.2 mm) (ZRC 1989.3751), Sinkawang, Kalimantan. A, B, lateral views of carapaces; C, D, frontal views of carapaces; E, F, right dorsal views of carapaces.
FIGURE 5. G1s in The identity of the Sarawak freshwater crab Parathelphusa oxygona Nobili, 1901, with description of a new species, Parathelphusa nobilii, from Western Kalimantan, Indonesia, Borneo (Crustacea: Brachyura: Gecarcinucidae)
FIGURE 5. G1s, Parathelphusa oxygona Nobili, 1901. A–D, male (31.4×24.8 mm) (ZRC 1989.2248), Gunung Serapi, Sarawak; E–H male (32.2×24.9 mm), Sadong, Sarawak; I, J, male (42.0×33.4 mm) (SM Cru 1986.6), Bidi, Sarawak; K, L, male (34.0×30.0 mm) (SM Cru 1986.115), Sarawak. A, ventral view of left G1; B, dorsal view of left G1; C, ventral view of distal part of left G1; D, dorsal view of distal part of left G1; E, I, K, dorsal views of right G1s; F, J, L, ventral views of right G1s; G, dorsal view of distal part of right G1; H, ventral view of distal part of right G1.
FIGURE 1. Overall dorsal views. A in The identity of the Sarawak freshwater crab Parathelphusa oxygona Nobili, 1901, with description of a new species, Parathelphusa nobilii, from Western Kalimantan, Indonesia, Borneo (Crustacea: Brachyura: Gecarcinucidae)
FIGURE 1. Overall dorsal views. A, Parathelphusa oxygona Nobili, 1901, male (36.6×28.0 mm) (ZRC 1992.10546), Serian, Sarawak; B, Parathelphusa nobilii sp. nov., holotype male (38.5×29.2 mm) (ZRC 1989.3751), Sinkawang, Kalimantan; C, Parathelphusa nobilii sp. nov., paratype female (40.5×30.3 mm) (ZRC 1989.3752), Sinkawang, Kalimantan.
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.