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485 results for “new diatom species”
FIGURES 33–38 in Fallacia californica sp. nov. (Bacillariophyta), a new freshwater diatom species from streams in California, USA
FIGURES 33–38. Fallacia californica Stancheva & Manoylov, sp. nov. type material from Aliso Creek, California, USA and from Soquel Creek (Figs 34, 37). Figs 33, 35 internal valve view. Figs 34, 36–38 external valve view. Fig. 33 shows areolae with remnants from thin hymens. Figs 34, 37 eroded valves with degraded conopeum show the canal of lyre-shaped sternum. Fig. 35 internal valve showing distinctly depressed lyre-shaped sternum. Fig. 36 finger-like protrusions, each with two to four "pegs", which fasten the connection of the conopeum and the mantle. Fig. 38 shows girdle band. SEM images, scale bars 1 μm.
FIGURE 2 in Lindavia biswashanti, a new diatom species (Bacillariophyta) from Gokyo Cho, Himalayan Range, Nepal
FIGURE 2: Size diminution series of Lindavia biswashanti. Light microscope images captured under a Leica DM2500. The holotype specimen is image C. Scale bars are all 10 μm. The central fultoportula is readily visible in larger specimens (A–F) and slightly offset from the center of the valve. Rimoportulae are indistinct in light microscope. The distinguishing features are the three triangular-shaped raised areas juxtaposed with three lowered areas to make six sectors in a superficial likeness of the nuclear fallout-shelter symbol.
FIGURE 3 in Lindavia biswashanti, a new diatom species (Bacillariophyta) from Gokyo Cho, Himalayan Range, Nepal
FIGURE 3: Scanning electron micrographs of Lindavia biswashanti. Image A exhibits the external view with central fultoportula (cfp), rimoportula (rp), and marginal fultoportulae of which one is arrowed (mfp). Image B is a small specimen that exhibits granules around the margin. Interior expressions of the central fultoportula, rimoportula, and marginal fultoportula are shown in images D & E. Image F is a close up of the rimoportula and marginal fultoportula shown in image D.
FIGURE 1 in Lindavia biswashanti, a new diatom species (Bacillariophyta) from Gokyo Cho, Himalayan Range, Nepal
FIGURE 1: Map of the Sagarmatha National Park region, Province No. 1, Solukhumbu District, Nepal. The region is dominated by some of the tallest peaks in the world. Mount Everest (8,848 m) and Cho Oyu (8,188 m) are shown. The lakes from which samples were collected comprise some of the highest elevation lakes in the world. Gokyo Cho is the locality from which the holotype material is collected. Location of the region in the Himalayas (inset).
FIGURES 31–34 in Nupela major sp. nov., a new diatom species from Maolan Nature Reserve, centralsouth of China
FIGURES 31–34. Nupela major sp. nov., internal views of rapheless valves, SEM. 31 & 32. The valves have a lanceolate axial area, and the striae are regularly-arranged. 33. Middle portion of the valve. 34. Apex of a valve.
FIGURES 27–30 in Nupela major sp. nov., a new diatom species from Maolan Nature Reserve, centralsouth of China
FIGURES 27–30. Nupela major sp. nov., rapheless valve, external valve views, SEM. 27 & 28. valve with obvious siliceous thickenings on the external surface. A deep trough extend the length of the valve. 29. Middle portion of the valve. 30. Apex of the valve.
FIGURES 23–26 in Nupela major sp. nov., a new diatom species from Maolan Nature Reserve, centralsouth of China
FIGURES 23–26. Nupela major sp. nov., internal views of raphe valve, SEM. 23 & 24. The raphe is straight, striae are made up of a number of areolae. 25. The distal raphe endings terminates in a small helictoglossa. 26. Proximal raphe ends curve slightly in the same direction. Striae appear irregular in length.
FIGURES 1–18 in Nupela major sp. nov., a new diatom species from Maolan Nature Reserve, centralsouth of China
FIGURES 1–18. Light microscopy of Nupela major sp. nov., 1–9. Raphe valves. 10–18. Rapheless valves. 4. holotype, focus at raphe valve. 14. holotype, focus at rapheless valve. Scale bars= 10 μm.
FIGURES 19–22 in Nupela major sp. nov., a new diatom species from Maolan Nature Reserve, centralsouth of China
FIGURES 19–22. Nupela major sp. nov., external view of raphe valve, SEM. 19 & 20. The valve has a undulate, lateral raphe, Striae are coarse, irregular in the middle part, and the areolae are covered externally by a hymenate occlusion. 21. Distal raphe fissure that deflect strongly in same direction onto the mantle, where they become recurved. 22. Middle portion of the valve with irregularly-shaped central area.
FIGURES 13–18 in Navicula amoyensis sp. nov. (Bacillariophyceae), a new benthic brackish diatom species from the Jiulong River estuary, Southern China
FIGURES 13–18. SEM micrographs of Navicula amoyensis sp. nov. Figs 13, 14. Internal views of entire valves of different frustules, showing an additional lateral thickening at the centre of the accessory rib (arrow). Fig. 15. Internal valve view showing details of central raphe fissures with a distinct central interruption (arrow). Fig. 16. Internal view showing details of the valve apices, where linear raphe axis distally terminated by more or less rounded helictoglossa (arrow) and positioned just below the terminal area. Fig. 17. Internal view. Striae composed of simple slit-like lineolae, positioned in shallow and narrow depressions (arrow). Fig. 18. Internal central raphe endings, interrupted by an extended thickening accessory rib (arrow). Scale bars in figs 13, 14 = 5 μm; fig. 15 = 2μm; figs 16–18 = 1 μm.
FIGURES 19–22 in Navicula amoyensis sp. nov. (Bacillariophyceae), a new benthic brackish diatom species from the Jiulong River estuary, Southern China
FIGURES 19–22. SEM micrographs of internal and girdle views of Navicula amoyensis under SEM. Figs 19, 20. Internal view of entire valves of different frustules. Note that the helictoglossa is almost central (arrow). Figs 21, 22. Girdle views showing the constricted frustules in the middle. External view of frustules showing broad girdle with pectinate margin (arrow). Scale bars in figs 19–22 = 10 μm.
FIGURES 9–12. Fig. 9 in Navicula amoyensis sp. nov. (Bacillariophyceae), a new benthic brackish diatom species from the Jiulong River estuary, Southern China
FIGURES 9–12. Fig. 9. External view of entire valve with terminal areas (arrow). Fig. 10. Central area showing the distinct continuous external central raphe endings. Figs 11, 12. Valve apices showing the external terminal raphe fissures deflected towards on the secondary valve side (arrow). Two rows of apical areolae at the valve apices. Scale bars in fig. 9 = 10 μm; fig. 10 = 2 μm; figs 11, 12 = 1 μm.
FIGURE 2–23 in Two new diatom species (Bacillariophyceae) from Brazilian floodplain: Actinella hermes-moreirae sp. nov. and Gomphonema mutunensis sp. nov.
FIGURE 2–23. Actinella hermes-moreirae sp. nov. LM. Valve view from type material. Scale bar = 10 μm.
FIGURES 24–31 in Two new diatom species (Bacillariophyceae) from Brazilian floodplain: Actinella hermes-moreirae sp. nov. and Gomphonema mutunensis sp. nov.
FIGURES 24–31. Actinella hermes-moreirae sp. nov. from type material, Mutum Island, SEM. 24. External view of valve. Scale bar = 5 μm. 25-26. Internal view of the valve. Scale bar = 5 μm. 27. Girdle view of the valve. Scale bar = 5 μm. 28. Aspect of the distal raphe end on headpole. Scale bar = 2 μm. 29-30. Headpole and footpole in internal view showing the rimoportula (arrow) and helictoglossa. Scale bar = 2 μm. 31. 29. Headpole in girdle view, showing the raphe on the mantle (arrow). Scale bar = 2 μm.
FIGURE 52–55 in Two new diatom species (Bacillariophyceae) from Brazilian floodplain: Actinella hermes-moreirae sp. nov. and Gomphonema mutunensis sp. nov.
FIGURE 52–55. Gomphonema mutunensis sp. nov. from type material, Mutum Island, SEM. 52. Girgle view. Scale bar = 10 μm. 53. Aspect of striae and areola shape. Scale bar = 2 μm. 54. Footpole in external view showing the pore field (arrow). 55. Headpole in external view. Scale bar = 1 μm.
FIGURE 48–51 in Two new diatom species (Bacillariophyceae) from Brazilian floodplain: Actinella hermes-moreirae sp. nov. and Gomphonema mutunensis sp. nov.
FIGURE 48–51. Gomphonema mutunensis sp. nov. from type material, Mutum Island, SEM. 48-51. Internal and external view of valve, respectively. Scale bar = 10 μm. 50. Internal view of axial area. 51. External view of axial area showing the central stigma (arrow). Scale bar = 2 μm.
FIGURES 12–19 in Delicata chongqingensis sp. nov., a new cymbelloid diatom species (Bacillariophyceae) from Daning River, Chongqing, China
FIGURES 12–19. Delicata chongqingensis, SEM, external views. 12, 13. External view of the whole valve. 14–17. External view of the central part of the valve showing the dorsal semifascia, three to four isolated, rounded or slite-like areolae (arrows), and the shortened striae in the valve centre on the dorsal side. 18, 19. Valve apices and tilde-shaped areolae forming distinct undulate striae. Scale bars = 5 μm (Figs 12, 13), 4 μm (Figs 14, 15), 2 μm (Figs 16–18) and 3 μm (Fig. 19).
FIGURES 20–25 in Delicata chongqingensis sp. nov., a new cymbelloid diatom species (Bacillariophyceae) from Daning River, Chongqing, China
FIGURES 20–25. Delicata chongqingensis, SEM, internal views. 20. Internal view of a whole valve and the dorsal semifascia. 21, 22. Internal view of valve ends with helictoglossae. Figs 23, 24. Internal view of valve centre, central area bordered by shortened striae, and one or two slit-like areolae on the ventral side marked by small marginal nodules (arrowheads). Fig. 25. Internal view of an eroded part of the valve, showing the stria alveoli and the oval and tilde-shaped internal openings of the areolae. Scale bars = 5 μm (Fig. 20), 2 μm (Figs 21, 22, 25), 3 μm (Figs 23, 24).
FIGURES 2–11 in Delicata chongqingensis sp. nov., a new cymbelloid diatom species (Bacillariophyceae) from Daning River, Chongqing, China
FIGURES 2–11. Delicata chongqingensis, LM (DIC). Valve views, showing the valve variability of the holotype population, scale bar = 10 μm.
FIGURES 1–18 in Planothidium sheathii a new monoraphid diatom species from rivers in California, USA
FIGURES 1–18. Planothidium sheathii LM views. Figs 1, 2, 5–9, 11–18 are SV. Figs 3, 4, 10 are RV. The same valve is presented at different focal plane to show the cavum hood aperture on figures 5 and 6, 11 and 12, 13 and 14, 15 and 16, 17 and 18. Figs 8, 9 and 10 are the same frustule. Arrows show cavum hood aperture borders fusion with neighboring virga on SV, arrowheads show more distant central shortened striae on RV. Figs 1–16 from the type locality San Joaquin River. Fig. 7 represents the holotype. Figs 17, 18 from Merced River, California, USA. All scale bars: 5 μm.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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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.