Find research datasets worth reusing

PLATE 6. Eunotia obtusisaculea Q. Liu, S. L in New and Interesting Diatoms from the Shiwan Wetwalls, Yunnan Province, China. III. Valve ultrastructure of four new species of Eunotia (Bacillariophyceae: Eunotiales)

PLATE 6. Eunotia obtusisaculea Q. Liu, S. L. Xie & Kociolek, sp. nov. Figures 43–50. Scanning electron microscope images. Figures 43–46, external views. Fig. 43. Whole valve view, showing thickened interstriae and blunt spines about the dorsal margin. Fig. 44. View of valve mantle near apex of the valve. Raphe is sinuous, dilated at the proximal end and barely extending onto the valve face. Fig. 45. View of mid-valve showing solid blunt spines on the dorsal margin. Thick interstriae separate striae which bear round occlusions. Fig. 46. Girdle view of a frustule near apex. Raphe branches can be seen on both valves. One valve possesses 10 cingulum elements, which all bear poroids. Figs. 47–50, internal views. Fig. 47. Whole valve. Striae occur in narrow troughs. Pseudosepta are present at the poles. Fig. 48. Valve apex, with helictoglossa and rimoportula present. Fig. 49. Mid-valve showing narrow troughs of the striae. Fig. 50. Apex of the valve.

PLATE 3. Eunotia sinensis Q. Liu, S. L in New and Interesting Diatoms from the Shiwan Wetwalls, Yunnan Province, China. III. Valve ultrastructure of four new species of Eunotia (Bacillariophyceae: Eunotiales)

PLATE 3. Eunotia sinensis Q. Liu, S. L. Xie & Kociolek, sp. nov. Figures 18–27. Light microscope images showing size diminution series. Holotype population. Scale bar = 10 µm.

PLATE 4. Eunotia sinensis Q. Liu, S. L in New and Interesting Diatoms from the Shiwan Wetwalls, Yunnan Province, China. III. Valve ultrastructure of four new species of Eunotia (Bacillariophyceae: Eunotiales)

PLATE 4. Eunotia sinensis Q. Liu, S. L. Xie & Kociolek, sp. nov. Figures 28–33. Scanning electron microscope images. Figures 28–30, external views. Fig. 28. Whole valve showing valve outline and distal raphe ends curing ca. ¼ of the way from the ventral margin towards dorsal margin. Figs 29, 30. Valve apices, with distal raphe end dilated slightly and curved onto the valve face. Areolae are occluded externally. Figures 31–33, internal views. Fig. 31. Whole valve, with pseudosepta present at each apex. Figs 32, 33, valve apices. Striae appear to be in continuous vertically-oriented troughs. Helictoglossa is short. The rimoportula is sessile, small.

PLATE 5. Eunotia obtusisaculea Q. Liu, S. L in New and Interesting Diatoms from the Shiwan Wetwalls, Yunnan Province, China. III. Valve ultrastructure of four new species of Eunotia (Bacillariophyceae: Eunotiales)

PLATE 5. Eunotia obtusisaculea Q. Liu, S. L. Xie & Kociolek, sp. nov. Figures 34–42. Light microscope images showing size diminution series. Holotype population. Scale bar = 10 µm.

PLATE 2. Eunotia yunnanica Q. Liu, S. L in New and Interesting Diatoms from the Shiwan Wetwalls, Yunnan Province, China. III. Valve ultrastructure of four new species of Eunotia (Bacillariophyceae: Eunotiales)

PLATE 2. Eunotia yunnanica Q. Liu, S. L. Xie & Kociolek, sp. nov. Figures 12–17. Scanning electron microscope images. Figures 12– 14, external views. Fig. 12. Whole valve showing thickened ridges between striae. Fig. 13. View of mid-valve showing striae multiseriate at the dorsal margin and onto the mantle, but uniseriate across the valve face. Fig. 14. Valve apex showing striae uniseriate on valve face and mantle. Distal raphe end curves ca. 1/3 of the way from the ventral margin towards the dorsal margin. Figs 15–17, internal views. Fig. 15. Whole valve view with pseudosepta present at apices. Fig. 16. Dorsal margin with striae multiseriate, becoming uniseriate across the valve face. Fig. 17. Valve apex showing pseudoseptum and helictoglossa.

PLATE 1. Eunotia yunnanica Q. Liu, S. L in New and Interesting Diatoms from the Shiwan Wetwalls, Yunnan Province, China. III. Valve ultrastructure of four new species of Eunotia (Bacillariophyceae: Eunotiales)

PLATE 1. Eunotia yunnanica Q. Liu, S. L. Xie & Kociolek, sp. nov. Figures 1–11. Light microscope images showing size diminution series. Holotype population. Scale bar = 10 µm.

FIGURES 31–34 in A new Eunotia (Bacillariophyta: Eunotiales) species from Karst formations of southern China

FIGURES 31–34. Eunotia sudeticiformis sp. nov. Narrow morphotype. SEM, internal views. 31. Whole valve view showing striae in trough–like openings in the center, but with individual areolae at the dorsal and ventral margins. Scale bar = 1 μm. 32, 33. Center of the valve showing areolae in one (Fig. 32) or two rows (Fig. 33) at the dorsal and ventral portions of the valve as well as in trough-like lines in the center. Scale bars = 1 μm. 34. Valve apex with helictoglossae and large rimportulae evident. Small spines can be seen on the exterior of the dorsal edge of the valve. Pseudoseptum is small at the apex. Scale bar = 1 μm.

FIGURES 28–30 in A new Eunotia (Bacillariophyta: Eunotiales) species from Karst formations of southern China

FIGURES 28–30. Eunotia sudeticiformis sp. nov. Narrow morphotype. SEM, external views. 28. Whole valve showing striae in shallow troughs, distal raphe ends curved onto the valve face near the apex and small spines scattered along the dorsal margin. Scale bar = 1 μm. 29. Close up of valve center with each areola with a thickened rim that occludes the opening (compare with the few areolae without occlusions). Note that there are few short striae intercalated between the full-length striae on the dorsal margin. Scale bar = 1 μm. 30. Valve apex with distal raphe end barely curving onto the valve face. A few larger areolae are positioned near the raphe opening. The apex on the valve face is unornamented. On the mantle the rimoportula opening is evident. Scale bar = 1 μm.

FIGURES 24–27 in A new Eunotia (Bacillariophyta: Eunotiales) species from Karst formations of southern China

FIGURES 24–27. Eunotia sudeticiformis sp. nov. Wider morphotype. SEM, internal views. 24, 25. Valve views, showing the striae are trough–like. Short striae between the regular striae are evident on the dorsal margin. Scale bars = 1 μm. 26. Valve apex with a single rimportula and helictoglossa evident. A pseudoseptum is present at the terminus. Scale bar = 1 μm. 27. Pseudoseptum, helictoglossa and grooved striae are evident at the terminus. Scale bar = 1 μm.

FIGURES 19–23 in A new Eunotia (Bacillariophyta: Eunotiales) species from Karst formations of southern China

FIGURES 19–23. Eunotia sudeticiformis sp. nov. Wider morphotype. SEM, external views. 19. Valve view of entire valve, showing distal raphe ends extending slightly onto the valve face. Striae occur in narrow channels. Distinctly larger poroids are present near the distal raphe ends. Scale bar = 1 μm. 20. Valve apex showing areolae have thin, narrow rims. Two larger openings are evident near the distal raphe end. Scale bar = 1 μm. 21. Valve center with uniseriate striae that extend onto the dorsal mantle. A few short striae along the dorsal margin are interspersed amongst the rest of the striae. Areolae are bordered by a thin rim. Scale bar = 1 μm. 22. Girdle view showing the numerous cingula, each bearing several rows of small poroids. Striae are present on the mantle, and raphe has dilated proximal ends. Scale bar = 1 μm. 23. Closer view of valve in girdle view showing raphe branch, disorganized areolae near the raphe and distinct opening of the rimportula. Scale bar = 1 μm.

FIGURES 1–18 in A new Eunotia (Bacillariophyta: Eunotiales) species from Karst formations of southern China

FIGURES 1–18. Eunotia sudeticiformis sp. nov. LM. Valve view, size diminution series. 1–9. Wider morphotype. 5. Holotype. 10–18. More narrow morphotype. Scale bar = 10 μm.

FIGURE 25 in Eunotia rudis sp. nov., a new diatom (Bacillariophyta) from the Man and Biosphere Reserve at Yangambi, Democratic Republic of the Congo

FIGURE 25. Variation in the valve length (diamond) and width (triangle) for 45 valves of Eunotia rudis measured in LM.

FIGURES 13–18. Eunotia rudis from type material CCA 3282, SEM external views. 13–14 in Eunotia rudis sp. nov., a new diatom (Bacillariophyta) from the Man and Biosphere Reserve at Yangambi, Democratic Republic of the Congo

FIGURES 13–18. Eunotia rudis from type material CCA 3282, SEM external views. 13–14. Overview of an entire valve. 15–16. Detail of both poles of the same valve showing the enlarged terminal raphe endings. 17. Overview of an entire frustule in girdle view. 18. Detail of the girdle bands near the undulation on the dorsal side. Scale bar: 10 μm (Figs 13–14, 17), 5 μm (Figs 15–16, 18).

FIGURES 2–12 in Eunotia rudis sp. nov., a new diatom (Bacillariophyta) from the Man and Biosphere Reserve at Yangambi, Democratic Republic of the Congo

FIGURES 2–12. Eunotia rudis, LM. 2–9.Valve views showing size diminution series. 10–12. Girdle views. 3–4. Same valve taken at different foci. 6–7. Same valve taken at different foci. 10–11. Same frustule taken at different foci. Valves and frustules from the holotype slide BR 4447, Libongo River, Tshopo Province, Democratic Republic of the Congo. 6–7. Valve representing the holotype. Scale bar: 10 μm.

FIGURE 1 in Eunotia rudis sp. nov., a new diatom (Bacillariophyta) from the Man and Biosphere Reserve at Yangambi, Democratic Republic of the Congo

FIGURE 1. Map showing the location of the Libongo Stream on the right bank of the Congo River, D.R. Congo. Modified from Virgilio et al. (2011).

FIGURES 19–24. Eunotia rudis from type material CCA 3282. 19–22. SEM external views. 23–24. SEM internal views. 1–20 in Eunotia rudis sp. nov., a new diatom (Bacillariophyta) from the Man and Biosphere Reserve at Yangambi, Democratic Republic of the Congo

FIGURES 19–24. Eunotia rudis from type material CCA 3282. 19–22. SEM external views. 23–24. SEM internal views. 1–20. Detail of the girdle bands near both poles of the same frustule. 21–22. Details of the areolae, obliquely perforating the thick silica wall; hymen (arrow) laying deep in the cell wall. 23. Overview of an entire valve. 24. Detail of a terminal raphe ending with a small helictoglossa and rimoportula (arrow). Scale bar: 10 μm (Fig. 23), 5 μm (Figs 19–20), 2 μm (21, 24), 1 μm (22).

FIGURES 55–67. E. pseudogroenlandica. 55–62 in Eunotia (Bacillariophyta) biodiversity from high altitude, freshwater habitats in the Mugecuo Scenic Area, Sichuan Province, China

FIGURES 55–67. E. pseudogroenlandica. 55–62. LM images; 63–67. SEM images; 63. External valve view; 64. Internal valve view; 66. Terminal ends of external valve; 65, 67. Terminal ends of internal valve, arrow show a rimoportula. LM scale bars, 10 μm.

FIGURES 39–54. E. pomeranica. 39–43 in Eunotia (Bacillariophyta) biodiversity from high altitude, freshwater habitats in the Mugecuo Scenic Area, Sichuan Province, China

FIGURES 39–54. E. pomeranica. 39–43. LM images; 44–46. SEM images; 44. External valve view; 45. Terminal ends of external valve; 46. Terminal ends of internal valve. Figs 47–54: E. michaelis. 47–51. LM images; 52–54. SEM images; 52. External valve view; 53–54. Terminal ends of external valve. LM scale bars, 10 μm.

FIGURES 28–38. E. odebrechtiana. 28–35 in Eunotia (Bacillariophyta) biodiversity from high altitude, freshwater habitats in the Mugecuo Scenic Area, Sichuan Province, China

FIGURES 28–38. E. odebrechtiana. 28–35. LM images; 36–38. SEM images; 36. Half external valve view; 37. Terminal ends of external valve; 38. Arrow show short striae of mantle in the middle. LM scale bars, 10 μm.

FIGURES 68–79. E. superpaludosa. 68–74 in Eunotia (Bacillariophyta) biodiversity from high altitude, freshwater habitats in the Mugecuo Scenic Area, Sichuan Province, China

FIGURES 68–79. E. superpaludosa. 68–74. LM images; 75–79. SEM images; 75. External valve view; 76–78. The ends of the raphe; 79. Areolae and velum. LM scale bars, 10 μm.