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53 results for “Chrysophyceae”
FIGURES 2–16 in A new species of the genus Mallomonas (Synurales, Chrysophyceae), Mallomonas fimbriata, sp. nov.
FIGURES 2–16. Mallomonas fimbriata, sp. nov. TEM and SEM images of different types of scales. Figs. 2–6. Body scales, TEM. Fig. 7. Caudal scale, TEM. Fig. 8. Caudal scale, SEM. Fig. 9. Group of body scales, SEM. Fig. 10. Group of scales including two caudal scales with short spines, SEM. Figs 11–13. Body scales, SEM. Fig. 14. Apical scale, SEM. Fig. 15: Body scale, bottom view, SEM. Fig. 16. Group of scales including two scales lying on the edge (lateral view), SEM. Scale bars: Figs. 2–8: 2 μm; Figs. 9–16: 1 μm.
FIGURE 2. A in Mallomonas alpestrina sp. nov. (Synurales, Chrysophyceae, Stramenopiles) and its spineless relatives-Mallomonas alata group
FIGURE 2. A. Whole-cell armor of Mallomonas alata f. alata in a scanning electron microscope (SEM) micrograph. B. Mallomonas alata f. hualvensis, whole cell in SEM. C. A combined micrograph of whole-cell armors of M. alata f. alata (upper part) and M. alata f. hualvensis (lower part) in a transmission electron microscope (TEM) micrograph. D. Whole-cell armor of M. tirolensis in TEM. Scale bar = 2 μm.
FIGURE 1. A–C in Mallomonas alpestrina sp. nov. (Synurales, Chrysophyceae, Stramenopiles) and its spineless relatives-Mallomonas alata group
FIGURE 1. A–C. Collar scales in: A. Mallomonas alata f. alata. B. Mallomonas alata f. hualvensis. C. Mallomonas tirolensis. D–F. Body scales in: D. Mallomonas alata f. alata. E. Mallomonas alata f. hualvensis. F. Mallomonas tirolensis. G–I. Transitional scales between the rear and the body scales in: G. Mallomonas. alata f. alata. H. Mallomonas alata f. hualvensis (note the considerably broad anterior flange). I. Mallomonas tirolensis. J–L. Rear scales in: J. Mallomonas alata f. alata. K. Mallomonas alata f. hualvensis. L. Mallomonas tirolensis. Scale bar = 1μm. A–L are shown at the same magnification.
FIGURE 3 in Mallomonas alpestrina sp. nov. (Synurales, Chrysophyceae, Stramenopiles) and its spineless relatives-Mallomonas alata group
FIGURE 3. Mallomonas alpestrina sp. nov. A. A collar scale. B–C. Body scales. D. Detail of body scale; note short ridges of reticulum surrounding large groups of pores. E–F. Asymmetrical body scales with one anterior flange considerably broader and shorter than the other. G–I. Rear scales. I. A rear scale bearing a diminutive spine. Scale bars = 1 μm, if not stated otherwise.
FIGURES 2–22 in Mallomonas cattiensis, sp. nov. (Synurales, Chrysophyceae), a new species from Viet Nam
FIGURES 2–22. Mallomonas cattiensis, sp. nov. TEM and SEM images of different types of scales. 2–3. Domed body scale with different focus, TEM. 4–5. Domed body scales, TEM. 6. Domeless body scale, TEM. 7. Domeless body scale, SEM. 8–9. Domed body scales, SEM. 10. Domed and domeless body scales, SEM. 11. Apical scale, SEM. 12. Domeless scale, SEM. 13. Group of scales, SEM. 14–16. Caudal scales, SEM. 17. Caudal scale, bottom view, SEM. 18. Domed body scale, bottom view, SEM. 19. Domeless body scale, lateral view, SEM. 20, 22. Bristles, SEM. 21. Bristle with domeless scale, SEM. Scale bars: 2–6, 13: 2 μm; 7–12, 14–22: 1 μm.
FIGURES 1–4 in A new freshwater chrysophyte, Chrysomorula cohaerens gen. et sp. nov. (Chrysophyceae, Chrysocapsaceae) from North America
FIGURES 1–4. Diagrammatic representation of Chrysomorula cohaerens colonies. Fig. 1: Mature colony within the gelatinous matrix. Fig. 2: Early stage of ball adhering cells. Fig. 3: Cells at periphery of a maturing colony. Fig. 4: A portion of adhering cells from a developing hollow colony. Scale bars: Figs. 1–2: 25 µm; Figs. 3–4: 10 µm
FIGURE 2. Mallomonas divida. A–D in Two new species of Mallomonas (Chrysophyceae: Synurales): Mallomonas temonis and Mallomonas divida
FIGURE 2. Mallomonas divida. A–D, collar scales with different shield patterns. The dome is partly reticulated by circular meshes; A–C, scales viewed in a transmission electron microscope (TEM); D, a scale viewed in a scanning electron microscope (SEM). The pattern on the shield is formed by one or several rows of more distinctive papillae; E–H, body scales with different shield patterns; E–G, scales viewed in TEM; H, a scale viewed in SEM; I, a rear scale with one anterior flange considerably longer than the other; J, two rearmost scales possessing spines; K, the scales comprising the scale case. Bar = 0.5 µm, if not stated otherwise. A–J are shown at the same magnification.
FIGURE 7 in A new species of Chrysosphaerella (Chrysophyceae: Chromulinales), Chrysosphaerella rotundata sp. nov., from Finland
FIGURE 7. Bayesian analysis of Chrysophyceae, based on the combined and partitioned SSU rDNA + rbcL dataset using a GTR+G+I model for all partitions. Values at the nodes indicate statistical support estimated by three methods – MrBayes posterior-node probability (left), maximum-likelihood bootstrap (middle), and maximum parsimony bootstrap (right). Thick branches represent nodes receiving the highest PP support (1.00). Newly obtained sequences are given in bold. Accession numbers for the concatenated sequences (SSU rDNA and rbcL, respectively) accompany each species name. Scale bar shows the estimated number of substitutions per site.
FIGURES 1–6 in A new species of Chrysosphaerella (Chrysophyceae: Chromulinales), Chrysosphaerella rotundata sp. nov., from Finland
FIGURES 1–6. Chrysosphaerella rotundata, sp. nov. Fig. 1. Large oval and less or more circular scales. Fig. 2. Large circular scale. Fig. 3. Large and small oval scales. Fig. 4. Spine with a thick shaft, and both oval and circular scales. Fig. 5. Two spines with a thick
FIGURE 8 in A new species of Chrysosphaerella (Chrysophyceae: Chromulinales), Chrysosphaerella rotundata sp. nov., from Finland
FIGURE 8. Comparison of the ITS2 sequences and predicted secondary structures of Chrysosphaerella rotundata and C. brevispina. Base numbering is indicated every 10 bases, and the four helices are numbered with Roman numerals. The structure shown corresponds to C. rotundata; positions conserved in C. brevispina are portrayed in green, bases substituted in C. brevispina are shown by the structure and connected to the respective position by a short line, deletions are indicated with minus symbols. Four base pairs marked in grey boxes are compensatory base changes (CBCs).
FIGURES 2–14 in A new species of the genus Mallomonas (Chrysophyceae: Synurales), Mallomonas kuzminii sp. nov., from lake Frolikha (Russia, Baikal region)
FIGURES 2–14. Mallomonas kuzminii sp. nov. TEM and SEM images of different types of scales. Figs. 2–3. Two forms of domed scales, TEM. Figs. 4–5. Domeless scales, TEM. Fig. 6. Caudal scale with spine, TEM. Figs. 7–8. Domed scales, SEM. Figs. 9–11, 16. Domeless scales, SEM. Fig. 12, 15 Caudal scale with spine, SEM. Fig. 13: Cyst, covered by scales, SEM. Fig. 14, 17. Bristles, SEM. Scale bars: Figs. 2, 4–5, 13: 2 µm; Figs. 3, 6–12, 14–17: 1 µm.
FIGURES 8–13 in Mallomonas loricata sp. nov. (Synurales, Chrysophyceae), a new tropical species from section Planae
FIGURES 8–13. Mallomonas loricata sp. nov., TEM images. Figures 8–10. Scales, depicting development of internal secondary reticulation. Figure 11. Group of scales of various shape and size. Figure 12. Bristle. Figure 13. The distal end of a bristle, displaying the wide slit running the length of the shaft, and the arrangement of small teeth on the apex. Scale bars: fig 11: 10 μm; fig 12: 5 μm; Figs. 8–10: 2 μm; fig 13: 1 μm.
FIGURES 2–7 in Mallomonas loricata sp. nov. (Synurales, Chrysophyceae), a new tropical species from section Planae
FIGURES 2–7. Mallomonas loricata sp. nov., SEM images. Figures 2–4. Scales from the type habitat, My Binh Reservoir in Binh Dinh Province; figure 2 is from the holotype specimen. Figure 5. Undersurface view of a scale. Note the base-plate pores, cover almost the entire scale surface. Figure 6. Undersurface view of two scales. Note the base-plate pores, cover about two-thirds of the proximal part of the scales, and fewer appear at the distal portion. Figure 7. Bristle. Scale bars: Figs. 5–7: 2 μm; Figs. 2–4: 1 μm.
FIGURES 9–17 in Mallomonas fragariformis sp. nov. (Synurales, Chrysophyceae), a new tropical chrysophyte species
FIGURES 9–17. Mallomonas fragariformis sp. nov. Figures 9, 10. Collar scales. Figure 9. SEM. Figure 10. TEM. Figure 11. Body and rear scales, TEM. Figures 12–16. Body scales, TEM. Figure 17. Group of scales and bristles. Scale bars: Figures 9, 12, 14: 1 μm; Figures 10–11, 13, 15–17: 2 μm.
FIGURES 2–8 in Mallomonas fragariformis sp. nov. (Synurales, Chrysophyceae), a new tropical chrysophyte species
FIGURES 2–8. Mallomonas fragariformis sp. nov. Figures 2–5. Body scales, SEM. Figure 5. Close-up view of the scale ornamentation. Figure 6. Rear scale with a small spine, SEM. Figure 7. Group of rear scales, SEM. Note the spines with four serrated edges. Figure 8. Group of body and rear scales, TEM. Scale bars: Figures 2–7: 1 μm; Figure 8: 2 μm.
FIGURES 2–4 in Two new species of silica-scaled chrysophytes (Chrysophyceae, Synurales) Mallomonas kicherica and M. sibirica water bodies of Eastern Siberia, Russia
FIGURES 2–4. Mallomonas kicherica sp. nov. Figure 2. Tips of bristles with teeth and bristle's foot. Figures 3–4, scales with labyrinthlike reticulation on the dome and transverse ribs, except for the area between the first and second, are connected in random order by short ribs-jumpers. SEM Scale bars: 2 μm.
FIGURES 5–11 in Two new species of silica-scaled chrysophytes (Chrysophyceae, Synurales) Mallomonas kicherica and M. sibirica water bodies of Eastern Siberia, Russia
FIGURES 5–11. Scales of Mallomonas sibirica sp. nov. from different types of habitats. Figure 5. Body scales with subcircular and smooth dome, evenly spaced transverse ribs and rounded depressions between them. The posterior rim, wide and smooth, bears numerous internal struts. The posterior flange has struts and scattered rounded depressions in the base plate that are not evenly spaced, from Lake Baikal, TEM. Figure 6. Body scale from the type habitat, Lake Ulu, SEM. Figures 7. Body scale, the dome is subcircular, ornamented with struts, undersurface view of the scales, from Lake Labynkyr, SEM. Figures 8. Body scale, the dome is subcircular patterned with rounded depressions, from Lake Labynkyr, SEM. Figure 9. Body scale, from a mixing zone of the Yenisei River and the Kara Sea waters, SEM. Figures 10–11. Body scale, undersurface view of the scales, from Lake Labynkyr, SEM. Scale bars: 2 μm.
FIGURES 2–8 in Mallomonas acidophila sp. nov. (Synurales, Chrysophyceae)-a new species from the tropics with morphological features of fossil taxa
FIGURES 2–8. Mallomonas acidophila sp. nov, scanning electron microscopy (SEM) images. Figures 2–5. Scales with shallow elongated domes. Figures 6–7. Undersurface view of scales. Figure 8. Scale and bristles. Scale bars: Figures 2–3, 6–7: 1 μm; Figures 4–5: 2 μm; Figure 8: 5 μm.
FIGURE 1 in Mallomonas rimosa sp. nov. (Synurales, Chrysophyceae)-a rare tropical species from Vietnam
FIGURE 1. Geographical position of the study area. Sample locations are marked with flags.
FIGURE 1 in Mallomonas lusca sp. nov. (Synurales, Chrysophyceae)-a rare species from Southeast Asia
FIGURE 1. Geographical position of the study area.
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