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222 results for “ancient lake”
FIGURE 1 in An endemic species flock of Cypridopsinae (Crustacea, Ostracoda) from the ancient Lake Malawi (Africa), with the description of a new genus and three new species
FIGURE 1. Location of Lake Malawi in the East African Rift System. Source: https://en.wikipedia.org/wiki/African_Great_Lakes (CC BY-SA 4.0)
FIGURE 14 in An endemic species flock of Cypridopsinae (Crustacea, Ostracoda) from the ancient Lake Malawi (Africa), with the description of a new genus and three new species
FIGURE 14. Limbs of Malawidopsis antoniae gen. et sp. nov., male—A. A1, Paratype (INV.159037). B. A2, Paratype (INV.159036). C. A2, detail of terminal part, Paratype (INV.159036). D. MdCox, Holotype (INV.159032). E. Md palp, Paratype (INV.159044). Scales: all 50 µm.
FIGURE 7 in An endemic species flock of Cypridopsinae (Crustacea, Ostracoda) from the ancient Lake Malawi (Africa), with the description of a new genus and three new species
FIGURE 7. Limbs of Malawidopsis stellae gen. et sp. nov., female—A. T2, Allotype (INV.159011). B. T3, Allotype (INV.159011). C. Rake like organ, Allotype (INV.159011). D. Mx1, respiratory plate not shown, Allotype (INV.159011). E. T1, Allotype (INV.159011). F & G. CR, Paratype (INV.159069). Scales: A, B, D–G = 50 µm; c = 10 µm.
FIGURE 3 in An endemic species flock of Cypridopsinae (Crustacea, Ostracoda) from the ancient Lake Malawi (Africa), with the description of a new genus and three new species
FIGURE 3. Malawidopsis stellae gen. et sp. nov.—A. Holotype, LVi (INV.159010, male). B. Paratype, RVi (INV.159014, male). C. Allotype, LVi (INV.159011, female). D. Allotype, RVi (INV.159011, female). E. Paratype, CpLL (INV.159016, female). F. Allotype, RVi, MSc (INV.159011, female). G. Paratype, CpD (INV.159017, female). H. Paratype, CpV (INV.159018, female). I. Paratype, CpV, detail of anterior (INV.159018, female). J. Paratype, LVi, detail of pores (INV.159010, male). Scales: A–E, G–H = 300µm; F = 50µm; I = 100µm; J=10µm.
FIGURE 13 in An endemic species flock of Cypridopsinae (Crustacea, Ostracoda) from the ancient Lake Malawi (Africa), with the description of a new genus and three new species
FIGURE 13. Malawidopsis antoniae gen. et sp. nov.—A. Holotype, LVi (INV.159032, male). B. Paratype, RVi (INV.159043, male). C. Allotype, LVi (INV.159033, female). D. Allotype, RVi (INV.159033, female). E. Paratype, CpLL (INV.159055, male). F. Paratype, RVi, MSc (INV.159039, female). G. Paratype, CpD (INV.159056, female). H. Paratype, CpV (INV.159057, female). I. Paratype, CpLL, detail of anterior (INV.159055, male). J. Paratype, CpLL, detail of ornamentation (INV.159055, male). Scales: A–E, G–H = 300µm; F = 50µm; I = 100µm; J = 30µm.
FIGURE 18 in An endemic species flock of Cypridopsinae (Crustacea, Ostracoda) from the ancient Lake Malawi (Africa), with the description of a new genus and three new species
FIGURE 18. Species of Malawidopsis gen. nov. from Lake Malawi. All non-type specimens, all CpLL. Not to scale. A. Malawidopsis sp. A gen. et sp. nov. B. Malawidopsis sp. B gen. et sp. nov. C. Malawidopsis sp. C gen. et sp. nov. D. Malawidopsis sp. D gen. et sp. nov. E. Malawidopsis sp. E gen. et sp. nov.. F. Malawidopsis sp. F gen. et sp. nov. (= Malawidopsis cunningtoni (Sars, 1910)). G. Malawidopsis stellae gen. et sp. nov. H. Malawidopsis sp. H gen. et sp. nov. I. Malawidopsis ruwaydae gen. et sp. nov. J. Malawidopsis sp. J gen. et sp. nov. K. Malawidopsis sp. K gen. et sp. nov. L. Malawidopsis sp. L gen.e t sp. nov. M. Malawidopsis sp. M gen. et sp. nov.. N. Malawidopsis sp. N gen. et sp. nov. sp. (= M. fuelleborni (Daday, 1910)). O. Malawidopsis sp. O gen. et sp. nov. P. Malawidopsis sp. P gen. et sp. nov. Q. Malawidopsis antoniae gen. et sp. nov.
FIGURE 11 in An endemic species flock of Cypridopsinae (Crustacea, Ostracoda) from the ancient Lake Malawi (Africa), with the description of a new genus and three new species
FIGURE 11. Limbs of Malawidopsis ruwaydae gen. et sp. nov., female—A. A1, Allotype (INV.159020). B. Md palp, Allotype (INV.159020). C. Md, Paratype (INV.159024). D. A2, Paratype (INV.159024). E. A2, detail of terminal part, Paratype (INV.159024). Scales: all 50 µm.
FIGURE 10 in An endemic species flock of Cypridopsinae (Crustacea, Ostracoda) from the ancient Lake Malawi (Africa), with the description of a new genus and three new species
FIGURE 10. Limbs of Malawidopsis ruwaydae gen. et sp. nov., male—A. T3, Holotype (INV.159019). B. T2, Holotype. C. Mx1, respiratory plate not shown, Holotype. D. T1, Paratype (INV.159028). E. Lpp, Holotype. F. Rpp, Holotype. G. Hp, Holotype. H. Zenker's organ, Holotype. Scales: All 50 µm.
Gudgeon fish with and without genetically determined countershading coexist in heterogeneous littoral environments of an ancient lake
<p>Countershading, characterized by a darker dorsal surface and lighter ventral surface, is common among many animals. This dorsoventral pigment polarity is often thought to be adaptive coloration for camouflage. By contrast, non-countershaded (melanistic) morphs often occur within a species due to genetic color polymorphism in terrestrial animals. However, the polymorphism with either countershaded or melanistic morphs is poorly known in wild aquatic animals. This study explored the genetic nature of diverged color morphs of a lineage of gudgeon fish (genus <i>Sarcocheilichthys</i>) in the ancient Lake Biwa, and propose this system as a novel model for testing hypotheses of functional aspects of countershading and its loss in aquatic environments. This system harbors two color morphs that have been treated taxonomically as separate species; <i>S. variegatus microoculus</i> which occurs throughout the littoral zone, and <i>S. biwaensis</i> which occurs in and around rocky areas. First, we confirmed that the divergence of dorsoventral color patterns between the two morphs is under strict genetic control at the levels of chromatophore distribution and melanin-related gene expression under common garden rearing. The former morph displayed sharp countershading coloration, whereas the latter morph exhibited a strong tendency towards its loss. The crossing results indicated that this divergence was likely controlled by a single locus in a two-allele Mendelian-inheritance pattern. Furthermore, our population genomic and genome-wide association study analyses detected no genome-wide divergence between the two morphs, except for one region near a locus that may be associated with the color divergence. Thus, these morphs are either in a state of intraspecific color polymorphism or two incipient species. Evolutionary forces underlying this polymorphism appears to be associated with heterogeneous littoral environments in this lake. Future ecological genomic research will provide insight into adaptive functions of this widespread coloration, including the eco-evolutionary drivers of its loss, in the aquatic world.</p>
Map of Aboveground Biomass and Uncertainty of Haloxylon in the Ancient Manas Lake Basin Area, Western Junggar Basin, Xinjiang, China
<p>This dataset is the research outcome of the National Natural Science Foundation of China project "Spatiotemporal Evolution and Attribution of Haloxylon Aboveground Biomass in the Junggar Basin under the Background of Climate Change" (Grant No.42261062) and the Natural Science Foundation of Xinjiang Uygur<br> Autonomous Region, China project "Remote Sensing Technology for Acquiring Aboveground Biomass of Haloxylon Forests in the Ancient Manas Lake Basin Sedimentary Area" (Grant No.2022D01A97). It reflects the map of aboveground biomass and uncertainty of Haloxylon in the ancient Manas Lake basin area, western Junggar Basin. The data is in tif format, with a coordinate system of UTM 45N and a resolution of 30 meters. It contains three bands, namely "AGB", "Uncertainty", and "AOA", representing "Haloxylon Aboveground Biomass", "Uncertainty of Haloxylon Aboveground Biomass", and "Areas of Applicability and Non-applicability".</p> <p>please cite "Yang XF. 2025. Mapping desert shrub aboveground biomass in the Junggar Basin, Xinjiang, China using Quantile Regression Forest (QRF). PeerJ 13:e19099 http://doi.org/10.7717/peerj.19099".</p>
FIGURE 7 in A revision of Rhombuniopsis Haas, 1920 (Unionida, Unionidae) endemic to the ancient lakes of Yunnan, China, with descriptions of two new species
FIGURE 7. Shells of Rhombuniopsis heres. A–D. Specimens collected from Lake Jianhu, KIZ1904401–KIZ1904404, shell length 64.4 mm, 51.3 mm, 39.2 mm, and 51.0 mm. E. Specimen collected from Lake Erhai, KIZ1904424, shell length 42.0 mm. F. Specimen collected from Lake Chenghai, KIZ1904421, shell length 42.6 mm. G. Holotype of Nodularia continentalis [currently a synonym of Inversidens pantoensis (Neumayr, 1899)] (SMF 3643), collected from Hunan (from Haas, 1910). H. Holotype of R. heres, collected from Tali-fu, Dali, Yunnan (from Neumayr, 1899). I. Specimen collected from Tali-fu, Dali, Yunnan (from Moskvicheva & Starobogatov, 1973). Scale bars: 1 cm.
FIGURE 5 in A revision of Rhombuniopsis Haas, 1920 (Unionida, Unionidae) endemic to the ancient lakes of Yunnan, China, with descriptions of two new species
FIGURE 5. Shells of Rhombuniopsis fultoni. A–B. Specimens collected from Lake Lulianghai, KIZ1904201–KIZ1904202, shell length 33.0 mm and 36.3 mm. C. Specimen collected from Lake Dianchi, KIZ1904211, shell length 26.0 mm. D. Holotype of R. fultoni, collected from Kunming, Yunnan, shell length 32.0 mm (from Moskvicheva & Starobogatov, 1973). Scale bars: 1 cm.
FIGURE 4 in A revision of Rhombuniopsis Haas, 1920 (Unionida, Unionidae) endemic to the ancient lakes of Yunnan, China, with descriptions of two new species
FIGURE 4. Shells of Rhombuniopsis tauriformis. A. Specimen collected from Lake Dianchi, KIZ1904101, shell length 37.2 mm. B. Specimen collected from Lake Dianchi, KIZ1904102, shell length 25.0 mm. C. Specimen collected from Lake Dianchi, KIZ1904104, shell length 37.0 mm. D. Holotype of R. tauriformis, fu-Yunnan, Yunnan (NHMUK 1906.5.8.72). E. Specimen collected from Lake Lulianghai, KIZ1904111, shell length 46.0 mm. F. Specimen collected from Lake Lulianghai, KIZ1904112, shell length 43.0 mm. Scale bars: 1 cm.
FIGURE 2 in A revision of Rhombuniopsis Haas, 1920 (Unionida, Unionidae) endemic to the ancient lakes of Yunnan, China, with descriptions of two new species
FIGURE 2. Shells of Rhombuniopsis and several other genera with similar morphology. A. Inversidens brandtii (Kobelt, 1879), Japan (SMF 3440). B. Leoparreysia canefrii (Vikhrev, Bolotov & Kondakov, 2017), Sittaung River near Taungoo, Myanmar (RMBH biv254_4). C. Middendorfnaia mongolica (Middendorff, 1850), Gladkaya River, Russian Far East (RMBH biv229_ 5). D. Pseudocuneopsis sichuanensis (Huang, Dai & Wu, 2022), Baitiao River near Chengdu, Sichuan, China. E. Cuneopsis celtiformis (Heude, 1874), China. F. Rhombuniopsis fultoni (Moskvicheva & Starobogatov), 1973, Lake Lulianghai, Yunnan, China. G. Rhombuniopsis tauriformis (Fulton, 1906), Lake Dianchi, Yunnan, China. H. Rhombuniopsis heres (Neumayr, 1899), Lake Jianhu, Yunnan, China. I. Rhombuniopsis songmeng sp. nov., Lake Babuhai, Yunnan, China. J. Rhombuniopsis linan sp. nov., Lake Yilong, Yunnan, China. K. Rhombuniopsis superstes (Neumayr, 1899), Lake Erhai, Yunnan, China. (Photos: from the MUSSEL Project, 2024 [A], Ivan Bolotov, 2017 [B], Ekaterina Konopleva, 2020 [C], Huang, Dai, Chen & Wu, 2022[E], Holotype of R. superstes from Neumayr, 1899 [K]). Scale bars: 1 cm
FIGURE 2 in А new species of Alona Baird, 1843 (Cladocera: Chydoridae) from the ancient Lake Ohrid
FIGURE 2. Alona begoniae sp. nov. from St Naum Bay, Lake Ohrid, Republic of North Macedonia (type locality). A–G, adult parthenogenetic female. A, lateral view. B, dorso-lateral view. C, head shield. D, head pores. E, distal portion of postabdomen. F, postabdominal claw. G, antenna. H, ephippial female.
FIGURE 3 in А new species of Alona Baird, 1843 (Cladocera: Chydoridae) from the ancient Lake Ohrid
FIGURE 3. Alona begoniae sp. nov. from St Naum Bay, Lake Ohrid, Republic of North Macedonia (type locality). A–O, parthenogenetic female. A–B, labrum. C, antennule. D, limb I. E, IDL and ODL of limb I. F, limb II. G, exopodite of limb II. H, exopodite of limb III. I–J, distal endite of limb III. K, exopodite of limb IV. L–M, inner portion of limb IV. N, exopodite of limb V. O, inner lobe of limb V. P–S, adult male. P, antennule. Q, limb I. R, copulatory hook and ODL of limb I. S, IDL of limb I.
FIGURE 1 in А new species of Alona Baird, 1843 (Cladocera: Chydoridae) from the ancient Lake Ohrid
FIGURE 1. Alona begoniae sp. nov. from St Naum Bay, Lake Ohrid, Republic of North Macedonia (type locality). A, juvenile female of instar II. B–I, adult parthenogenetic female. B, lateral view. C, ventral margin of valves. D, posteroventral angle of valves. E, head shield. F, head pores. G–H, postabdomen. I, antenna. J, ephippial female. K–M, adult male. K, lateral view. L, postabdomen. M, postabdominal claw.
FIGURES 393–442 in Observations on Hippodonta (Bacillariophyceae) in selected ancient lakes
FIGURES 393–442: LM micrographs. Figs 393–441. Hippodonta arkonensis. Fig. 404. Complete frustule in girdle view. Fig. 442. Hippodonta baicalorostrata. Scale bar = 10 µm.
FIGURES 276–307 in Observations on Hippodonta (Bacillariophyceae) in selected ancient lakes
FIGURES 276–307: LM micrographs. Figs 276–290. Hippodonta crassa (type material). Fig. 290. Complete frustule in girdle view. Figs 291–307. Hippodonta radiata (type material). Fig. 307. Complete frustule in girdle view. Scale bar = 10 µm.
FIGURES 272–275 in Observations on Hippodonta (Bacillariophyceae) in selected ancient lakes
FIGURES 272–275: SEM micrographs. Figs 272, 273. Hippodonta capitata. Fig. 272. External view of entire valve. Striae biseriate throughout. Terminal pores of raphe slightly deflected towards secondary valve side. Fig. 273. Internal view of entire valve. Striae composed of two or three lines of pores, positioned in quite broad depressions. Raphe sternum thickened towards central raphe endings. Helictoglossae positioned just before terminal area, not advancing into it. Figs 274, 275. External view of entire valves of Hippodonta hungarica. Striae biseriate throughout; lineolae quite small; terminal pores of raphe weakly deflected towards secondary valve side. Scale bars in Figs 272–275 = 5 µm.
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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)
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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.