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485 results for “new diatom species”
FIGURES 1–6. Plagiogramma subatomus. SEM except Fig. 1 DIC. Fig. 1 in New species of benthic marine diatoms (Bacillariophyta) from the Western Pacific islands of Guam and Yap
FIGURES 1–6. Plagiogramma subatomus. SEM except Fig. 1 DIC. Fig. 1. Holotype, GU44I-1, Guam. Fig. 2. External view of valve showing spines and apical slits; J5, Jaluit Atoll, Marshall Is. Fig. 3. Internal view showing boxlike pseudoseptum and apical slits, Palau (Konno). Fig. 4. Part of chain showing face to face connections; note the various depths of the copulae (arrow); PW2009-31, Palau. Figs 5, 6. Yap specimens (Y18E) showing internal aspect and a frustule in oblique view; arrow points to copulae. Scale bars: Fig. 1 = 10 µm, Figs 2–6 = 2 µm.
FIGURES 62–69. Climaconeis lorenzii SEM, Y26C, Yap. Figs 62, 63 in New species of benthic marine diatoms (Bacillariophyta) from the Western Pacific islands of Guam and Yap
FIGURES 62–69. Climaconeis lorenzii SEM, Y26C, Yap. Figs 62, 63. Central and apical portions of frustule in valve view showing deflected central raphe endings and row of larger pores along one side of sternum (Fig. 62 arrow). Fig. 64 Frustule showing craticular bars. Figs 65, 66. Central and apical portions of frustule in girdle view, showing large pores on pars exterior of the valvocopula (VC). Figs 67–69. Valve with valvocopula. Fig. 67. Entire (incomplete) specimen. Fig. 68. Detail of valvocopula showing the abvalvar surface on the left, hollow box structure shown at small arrow; on the right side below the break the frame is rotated inward to also show the pars exterior (arrowhead). and above the break rotated outward to show the proximal side of the box with crenulated margin (large arrow). Fig. 69. Detail of apex of valvocopula showing apparent break in the frame at the apex, the lack of pores near the apex, and the interlocking surfaces of the craticular bars. Scale bars: Figs 62–66, 69 = 5 µm, Fig. 67 = 10 µm, Figs 68 = 2 µm.
FIGURES 18–23. Licmophora graphis. SEM except Fig. 18 DIC. Fig. 18 in New species of benthic marine diatoms (Bacillariophyta) from the Western Pacific islands of Guam and Yap
FIGURES 18–23. Licmophora graphis. SEM except Fig. 18 DIC. Fig. 18. Living cells epiphytic on ectocarpoid phaeophyte filament, showing numerous small elliptical plastids clustered around the nucleus, GU44U-2. Figs 19–21. Holotype specimen whole mount on stub 718, GU44BJ-3: entire frustule and details of base and apex, showing change in stria density and presence of two apical rimoportulae (arrows). Figs 22, 23. Base and apex of specimen from GU80A-3. Scale bars: Figs 18, 19 = 10 µm, Figs 20–23 = 5 µm.
FIGURES 91–102 in New species of benthic marine diatoms (Bacillariophyta) from the Western Pacific islands of Guam and Yap
FIGURES 91–102. Pleurosigma simulacrum. DIC (Figs 91–93), SEM (Figs 94–102). Figs 91, 92. Holotype specimen, entire and portion at higher magnification, GU44AR-1. Fig. 93. Living cell, GU44AD-1. Figs 94–97. Specimens from culture GU52X-1 (courtesy M. Ashworth). Fig. 94. Central area, external view showing nonoverlapping central raphe endings. Fig. 95. Apex, showing hooked terminal raphe ending. Fig. 96. Internal central area; arrows indicate lines of small areolae along the sternum and valve border. Fig. 97. Internal apex, in this case with no areolae around the apex (arrowhead). Figs 98–101. Specimens from wild material. Figs 98, 99. External central and apical portions, the latter showing absence of calcar along valve border; Y26B, Yap, same arrows as on culture specimens. Figs 100, 101. Internal central and apical portions, GU44AR-1, same arrows as on culture specimens, apex showing one duplex areola on each side of the apex. Fig. 102. Specimen from Y37-8, showing apex with single duplex areola at apex. Scale bars: 91–93 = 10 µm, Figs 98, 99 = 5 µm, Figs 94–97, 100–102 = 2 µm.
FIGURES 7–17. Licmophora romuli. SEM except Fig. 7 in New species of benthic marine diatoms (Bacillariophyta) from the Western Pacific islands of Guam and Yap
FIGURES 7–17. Licmophora romuli. SEM except Fig. 7 phase contrast. Fig. Holotype specimen from GU44P-B, Guam; arrow marks the basal rimoportula. Fig. 8. Whole mount showing valvocopula with midrib crossing first from abvalvar side (the VC belongs to the valve underneath) to advalvar side, then back (arrowheads). Fig. 9. Part of acid-cleaned valve showing acropetal transition in the number of vimines outward from the sternum; Y41-7, Yap. Fig. 10. Internal aspect of basal pole with rimoportula. Fig. 11. External aspect of a pair of basal poles, showing multiscissura and rimoportula opening. Fig. 12. Internal aspect of an apex showing apical rimoportula. Fig. 13. Whole mount showing pleurae. Fig. 14. Valvocopula closed end showing lack of septum. Figs. 15–17. Parts of a valvocopula showing the midrib transitions (arrowheads) and the simply tapered open tip. Figs 8, 11, 13 from GU44P-B; Figs 12, 14–17 from GU52X-1. Scale bars: Fig. 7 = 10 µm, Figs 8, 9, 13–16= 5 µm, Figs 10–12 = 2 µm
FIGURES 79–90. Parlibellus waabensis. SEM except Figs 79, 80 DIC. Figs 79, 80 in New species of benthic marine diatoms (Bacillariophyta) from the Western Pacific islands of Guam and Yap
FIGURES 79–90. Parlibellus waabensis. SEM except Figs 79, 80 DIC. Figs 79, 80. Holotype at two focal planes, Y39A. Fig. 81. Valve in valve view. Fig. 82. Detail of valve showing short biseriate sections of some striae on the mantle (arrows). Fig. 83. Valve in oblique view, arrow again pointing to biseriate stria. Figs 84, 85. External and internal aspect of valve apex showing terminal raphe hook relation to adjacent striae (arrows). Figs 86, 87. Details of internal apex and central area. Figs 88–90. Frustule in girdle view, with details of central and apical portions, the bands labeled in Fig. 90. Scale bars: Figs 79–83, 88 = 10 µm, Figs 84–87, 89, 90 = 5 µm
FIGURES 16–21 in Encyonema chebalingense sp. nov., a new freshwater diatom species (Cymbellales, Bacillariophyceae) from Guangdong Province, China
FIGURES 16–21. Encyonema chebalingense sp. nov. SEM images from type material, internal views. 16. Entire valve view. 17–21. Apex of valve with distal raphe ending terminating as a helictoglossa. Fig. 18. Valve center showing central nodule with proximal ends of the raphe hidden by siliceous covering. Figs 19–21. Distal raphe end showing helictoglossa. Scale bars = 1 μm (19–21), 2 μm (Fig.17–21): 2.5 μm (16).
FIGURES 10–15 in Encyonema chebalingense sp. nov., a new freshwater diatom species (Cymbellales, Bacillariophyceae) from Guangdong Province, China
FIGURES 10–15. Encyonema chebalingense sp. nov. SEM images from type material. External views. 10–11. Valve in external view. 12–13. Apex of valve showing proximal raphe endings. 14. External view of the valve center. Note the distal raphe endings ae hooked towards the ventral margin. 15. Distal raphe ending at valve apex. Scale bars = 1 μm (12), 1.5 μm (15), 2 μm (13, 14), 2.5 μm (11), 5 μm (10).
FIGURES 1–9 in Encyonema chebalingense sp. nov., a new freshwater diatom species (Cymbellales, Bacillariophyceae) from Guangdong Province, China
FIGURES 1–9. Encyonema chebalingense sp. nov. LM. Size diminution series of individuals from the holotype slide. Valve views. Scale bar =10 μm
FIGURES 64–67 in Pseudostaurosira crateri sp. nov. (Fragilariaceae, Bacillariophyta), a new small araphid, fossil diatom species from the Pleistocene (Atlantic Forest, Brazil)
FIGURES 64–67. SEM micrographs of Pseudostaurosiropsis geocollegarum (Witkowski) E.Morales from Lac d'Yrieux, France (64) and Lake Edward, Democratic Republic of the Congo and Uganda (65–67). (64, 67) Valve view presenting details of sternum, apical pore fields, and striae composed of two rows of areolae. Notice the disc-like closing plates that occludes each areola (64, 66, 67). Detail on simple and bifurcate spines (65). Valve interior showing absence of rimoportulae. Notice the volae in the inner perimeter of the areolae (66). Girdle view showing open, plain, and ligulate copulae without perforations. Notice the mantle plaques.
FIGURES 48–57 in Pseudostaurosira crateri sp. nov. (Fragilariaceae, Bacillariophyta), a new small araphid, fossil diatom species from the Pleistocene (Atlantic Forest, Brazil)
FIGURES 48–57. SEM micrographs of Pseudostaurosira crateri Marquardt & C.E.Wetzel sp. nov. from type material (holotype SP365.548) sampled from Colônia Basin, São Paulo, Brazil: (48–51) Overall characteristics of the outer surface of the valve face. Notice an apical pore field on each valve end and striae each composed of one areola on valve face and two to three on mantle (50, 51). Arrow 1 points to the volae in the inner perimeter of the areolae (50). Arrow 2 points to the rudimentary or incipient spines located on the virgae (50–52). Girdle view of a frustule showing characteristics of the cingulum. Notice (arrow 3) open girdle bands (52). Detail of the areolae open into a single depression (arrow 4) running from valve face to mantle (53). Inner valve surface showing absence of rimoportulae and areolae characteristics (55–57). Notice internal detail (arrow 5) of superimposed disks formed by depositions of siliceous material on the volae (57). Detail (arrow 6) of apical pore field (57).
FIGURES 58–63 in Pseudostaurosira crateri sp. nov. (Fragilariaceae, Bacillariophyta), a new small araphid, fossil diatom species from the Pleistocene (Atlantic Forest, Brazil)
FIGURES 58–63. SEM micrographs of Staurosirella canariensis (Lange-Bertalot) E.Morales, Ector, Maidana & Grana in Grana et al. from River Oise (58, 61), Étang de l'Aumée (60, 63), and Étang des Landes (59, 62), France. (58–60) Valve view presenting details of sternum, apical pore fields, and striae composed of lineolae. Notice the "punch-hole" appearance of the striae (60). Detail of spatulated spines, 1-2 (occasionally) per virgae (60). Valve interior showing absence of rimoportulae (61). Notice the volae in the inner perimeter of the areolae (62). Girdle view showing closed girdle bands (62).
FIGURES 68–71 in Pseudostaurosira crateri sp. nov. (Fragilariaceae, Bacillariophyta), a new small araphid, fossil diatom species from the Pleistocene (Atlantic Forest, Brazil)
FIGURES 68–71. SEM micrographs of (68) Pseudostaurosira brevistriata (Grunow) D.M.Williams & Round from Lac de l'Uby, France. Valve view presenting details of sternum, apical pore fields, and striae composed of two rows of areolae. Notice profusely branched volae originated from the inner periphery of the areola and spines within striae. (69) Pseudostaurosira sp. Lac d'Arjuzanx, France. Valve view presenting details of sternum, apical pore fields, and striae composed of two to occasionally four rows of areolae. Notice conical spines within striae. (70) Pseudostaurosira parasitica (W.Smith) E.Morales in Morales & Edlund from Étang de Leon, France. Valve view presenting details of sternum and apical pore fields. Notice striae composed transapically elongated areolae. (71) Pseudostaurosira subconstricta (Grunow) Kulikovskiy & Genkal in Kulikovskiy et al. from Lac de la Cassière, France. Valve view presenting details of sternum and apical pore fields. Notice striae composed of one to six round and small areolae.
FIGURES 16–20 in Pinnularia qinghainensis: a new diatom species (Bacillariophyta) found in the brackish Lake Qinghai, China
FIGURES 16–20. Pinnularia qinghainensis sp. nov., SEM external view. 16. Complete valve. 17. Detail of centre in Fig. 16, note hexagonal central area and slightly bent central raphe ends. 18, 19. Detail of pole in Fig. 16 showing curved distal raphe fissures and striae composed of 4 rows of small areolae. 20. Detail of striae showing small areolae occluded by silica plates. Scale bar = 10 μm (Fig. 16), 1 μm (Figs 17–20).
FIGURES 21–25 in Pinnularia qinghainensis: a new diatom species (Bacillariophyta) found in the brackish Lake Qinghai, China
FIGURES 21–25. Pinnularia qinghainensis sp. nov., SEM internal view. 21. Complete valve. 22. Detail of centre in 21, note hexagonal central area bordering margins with few short striae. 23. Detail of centre of valve showing hexagonal central area reaching margins. 24, 25. Details of two poles in Fig. 21. Scale bar = 10 μm (Fig. 21), 1 μm (Figs 22–25).
FIGURES 19–21 SEM, internal valve views. Fig. 19 in Cymbella xiaojinensis sp. nov., a new cymbelloid diatom species (Bacillariophyceae) from high altitude lakes, China
FIGURES 19–21 SEM, internal valve views. Fig. 19. Internal view of entire valve. Fig. 21. Internal view of valve apex with prominent helictoglossa deflecting to the dorsal side. Fig. 20. Showing the valve centre and 1–2 stigmata as elongated furrows connected to the striae. Scale bars = 2 μm.
FIGURES 15–18 SEM, external views. Fig. 15 in Cymbella xiaojinensis sp. nov., a new cymbelloid diatom species (Bacillariophyceae) from high altitude lakes, China
FIGURES 15–18 SEM, external views. Fig. 15. External view of an entire valve. Figs 17–18. Valve apices, striae with elliptic/rounded areolae and pore field separated by the distal raphe fissures. Fig.16. External view of valve center, the proximal raphe endings and the very large central area with 1–2 stigmata. Scale bars = 2 μm.
FIGURES 1–14 in Cymbella xiaojinensis sp. nov., a new cymbelloid diatom species (Bacillariophyceae) from high altitude lakes, China
FIGURES 1–14 LM micrographs of the type population of Cymbella xiaojinensis in Lake Shadecuo. Valve views, showing the valve variability of the holotype population. Scale bar = 10 μm.
FIGURE 18 in Halamphora minima (Catenulaceae, Bacillariophyta), new brackish diatom species from the mudflat in Hampyeong Bay, Korea
FIGURE 18. Molecular phylogenetic tree obtained from ML and BI analysis based on rbcL gene showing the phylogenetic positions of Halamphora minima. The values on each node indicate ML bootstrap and Bayesian posterior probabilities (%), respectively. The asterisk indicates 100, and – indicates the topological incongruence between ML and BI trees.
FIGURES 11–17 in Halamphora minima (Catenulaceae, Bacillariophyta), new brackish diatom species from the mudflat in Hampyeong Bay, Korea
FIGURES 11–17. SEM micrographs of Halamphora minima sp. nov. Fig. 11. External whole valve view, with central area (asterisk), and dorsal raphe ledge (arrow). Fig. 12. Internal whole valve view. Fig. 13. Detail of external valve apex,with dorsal raphe ledge (arrow) Fig. 14. Detail of internal valve apex showing tongue-like proximal helictoglossae (double asterisk), poorly developed distal helictoglossae (arrowhead), and internal longitudinal rib (arrow). Fig. 15. Detail of internal dorsal areolae occluded by hymens (arrows). Fig. 16. Dorsal girdle bands with two rows of poroids. Fig. 17. frustules showing the ventral girdle bands with dorsal raphe ledge (arrow). Scale bars: Figs 11—14, 16, 17 = 1 μm, Fig. 15 = 0.5 μm.
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Allen Brain Atlas
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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.