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485 results for “new diatom species”
FIGURES 3–20 in Encyonema hamsherae, a new diatom species from the Northern Rocky Mountains, USA
FIGURES 3–20: Figures 3–16, Encyonema hamsherae sp. nov. Figures 17–20. Encyonema hebridicum. Figs 3 (holotype), 4, 7, 8, 10–13. Shovel Creek, Montana; Figs 5, 9. Castle Creek (Stillwater), Montana; Fig. 6. Tongue River, Wyoming; Figs 14–16. Trout Creek, Montana; Figs 17, 18. Kootenai Fen, Glacier National Park, Montana (MDC sample # 451707 (1), University of Montana Herbarium (MONTU) accession #39–85); Figs 19, 20. (isotype) Lulea Lappmark, Sweden (Cleve and Möller Nr. 37), Fig. 20 shows two focal planes of same valve. Scale bars are 10 µm unless otherwise noted.
FIGURE 2b in Encyonema hamsherae, a new diatom species from the Northern Rocky Mountains, USA
FIGURE 2b:Dorsal and ventral striae densities of these sample populations, range for E. hebridicum (Krammer, 1997) is illustrated by the line in the lower left of the graph.
FIGURE 2a in Encyonema hamsherae, a new diatom species from the Northern Rocky Mountains, USA
FIGURE 2a:Length and width measurements of different populations of E. hamsherae sp. nov. from Montana and Wyoming, the range for E. hebridicum given by Krammer (1997) is shown by the rounded box.
FIGURE 1 in Encyonema hamsherae, a new diatom species from the Northern Rocky Mountains, USA
FIGURE 1: Sites in Montana and Wyoming where Encyonema hamsherae has been recorded. Numbers for each site correspond to those in Table 1. Circle size is proportional to number of E. hamsherae valves recorded in an 800 valve count; please refer to Table 1 for abundance data for each site. Only those sites with associated physical and water chemistry data are listed in Table 2.
FIGURES 26–34. Planothidium delicatulum. Figs. 26–32 in Planothidium galaicum sp. nov. (Bacillariophyta, Achnanthidiaceae), a new diatom species from Galician coast, Spain
FIGURES 26–34. Planothidium delicatulum. Figs. 26–32. Kützing's original drawings of Achnanthidium delicatulum presented in his 1844 publication. Figs. 33, 34. Van Heurck's drawings of Achnantes delicatula presented in his 1880–1881 publication. Scale bar: 10 µm.
FIGURES 23–25. Planothidium galaicum. Type population. SEM micrographs. Fig. 23 in Planothidium galaicum sp. nov. (Bacillariophyta, Achnanthidiaceae), a new diatom species from Galician coast, Spain
FIGURES 23–25. Planothidium galaicum. Type population. SEM micrographs. Fig. 23. External view of the rapheless valve. Fig. 24. Internal view of the raphe valve showing the raised sternum and interstriae. Fig. 25. External view of a raphe valve showing de enlarged central pores and the deflected terminal fissures. Scale bar: 2 µm (Figs. 23–25).
FIGURES 2–22. Planothidium galaicum. Type population. Figs. 2–19 in Planothidium galaicum sp. nov. (Bacillariophyta, Achnanthidiaceae), a new diatom species from Galician coast, Spain
FIGURES 2–22. Planothidium galaicum. Type population. Figs. 2–19. LM micrographs. Figs. 20–22. SEM micrographs. Figs. 2–6. Rapheless valves. Figs. 7, 13, 19. Girdle views of an entire frustule. Figs. 8–12, 14–18. Raphe valves. Fig. 20. Internal view of rapheless valve showing the raised sternum and the interstriae. Fig. 21. External view of a rapheless valve showing the spinules developed in the interstriae. Fig. 22. External detail of the apex of the rapheless valve showing the spinules, which are wider in the valve margin. Scale bar: 10 µm (Figs. 2–19), 2 µm (Figs. 20, 21), 1 µm (Fig. 22).
FIGURES 38–42 in Surirella subrotunda sp. nov. and Surirella parahelvetica sp. nov., two new diatom (Bacillariophyta) species from Lake Prespa, Macedonia
FIGURES 38–42: Surirella parahelvetica (SEM). Figs 38, 41. External views. Fig. 41. Short conic spines along inner side of keel (white arrow), spines on alar canals (black arrow). Keel with silica ridges following raphe and a random pattern of silica thickening on the keel. Figs 39, 40, 42. Internal views. Fig. 42. terminal raphe fissures with simple pores, not deflected and areolae with ringed domes. Scale bars in Figs 38–40 = 10 µm; Fig. 41 = 5 µm; Fig. 42 = 2 µm.
FIGURES 61–64 in New and rare diatom (Bacillariophyta) species from a mountain lake in Eastern Siberia
FIGURES 61–64: Encyonopsis vasijevae, sp. nov., SEM. Figs 61, 62. External valve views. Figs 63, 64. Internal valve views. Fig. 64. Middle part of a valve showing central area and internal proximal raphe ends. Scale bars in Figs 61–63 = 5 µm, in Fig. 64 = 1 µm.
FIGURES 35–44 in New and rare diatom (Bacillariophyta) species from a mountain lake in Eastern Siberia
FIGURES 35–44: Neidium species, LM. Figs 35–39. N. rugosum, sp. nov. Fig. 38. Holotype specimen. Figs 40–42. N. holstii. Figs 43, 44. N. boyeri. Scale bar = 10 µm.
FIGURES 22–34 in New and rare diatom (Bacillariophyta) species from a mountain lake in Eastern Siberia
FIGURES 22–34: Brachysira species. Figs 22–28, 33, 34. B. subtile, sp. nov. Figs 22–28. LM. Fig. 23. Holotype specimen. Figs 33, 34. SEM. Fig. 33. Internal valve view. Fig. 34. External valve view. Figs 29, 30. B. styriaca, LM. Figs 31, 32. B. zellensis, LM. Scale bar in Fig. 22 = 10 µm for all LM figures, in Figs 33, 34 = 5 µm.
FIGURES 47–60 in New and rare diatom (Bacillariophyta) species from a mountain lake in Eastern Siberia
FIGURES 47–60: Encyonema and Encyonopsis species, LM. Figs 47, 48. Encyonema sibiricum. Figs 49–56. Encyonopsis vasijevae, sp. nov. Fig. 51. Holotype specimen. Fig. 57. Encyonema norvegicum. Figs 58, 59. E. lunatum var. borealis. Fig. 60. E. lunatum var. alaskaense. Scale bar = 10 µm.
FIGURES 16–19 in Surirella subrotunda sp. nov. and Surirella parahelvetica sp. nov., two new diatom (Bacillariophyta) species from Lake Prespa, Macedonia
FIGURES 16–19: Surirella rotunda Jurilj (LM). Fig. 16, line drawing of type (reprinted from Jurilj 1948). Figs 17–20. Images from Jurilj's slide collection (BRM). Scale bar = 20 µm.
FIGURES 10–15 in Surirella subrotunda sp. nov. and Surirella parahelvetica sp. nov., two new diatom (Bacillariophyta) species from Lake Prespa, Macedonia
FIGURES 10–15: Surirella subrotunda (SEM). Figs 10, 12, 14. External views. Figs 12, 14. Illustrating raphe formation on keel, 4–5 fenestral bars, uniseriate areolae pattern and small abundant papillae on valve face. Figs 11, 13, 15. Internal valve views. Fig. 11. Illustrating asymmetrical depression (white arrow) and marginal opening into alar canals. Fig. 13. Illustrating terminal raphe fissure and internal opening of areolae. Fig. 15. Illustrating internal valve face and external view of alar canals with multiseriate striae extending to keel. Raphe fissures on the keel terminate as simple pores, not deflected. Scale bars in Fig. 11 = 20 µm; Fig. 10 = 10 µm; Figs 12, 13, 15 = 5 µm; Fig. 14 = 2 µm.
FIGURES 1–21 in New and rare diatom (Bacillariophyta) species from a mountain lake in Eastern Siberia
FIGURES 1–21: Eunotia species. Fig. 1. E. julma. Figs 2–15, 19, 21. E. frigida, sp. nov. Figs 2–15. LM. Fig. 4. Holotype specimen. Figs 19, 21. SEM. Fig. 19. Internal valve view. Fig. 21. External valve view. Figs 16–18, 20. E. ferefalcata. Figs 16–18.LM. Fig. 20. SEM. external valve view. Scale bars in Figs 1 & 2 = 10 µm for all LM figures, in Figs 19–21 = 2 µm.
FIGURES 45–46 in New and rare diatom (Bacillariophyta) species from a mountain lake in Eastern Siberia
FIGURES 45–46: Neidium rugosum, sp. nov., SEM. Fig. 45. External valve view. Fig. 46. Internal valve view. Scale bars = 10 µm.
FIGURES 65–76 in New and rare diatom (Bacillariophyta) species from a mountain lake in Eastern Siberia
FIGURES 65–76: Fig. 65. Stauroneis crassula, LM. Fig. 66. Pinnularia semicruciata, LM. Figs 67–69. Gomphonema angusticephalum, LM. Figs 70, 71, 76. Naviculadicta mongolica. Figs 70, 71. LM. Fig. 76. SEM, internal valve view. Figs 72, 73. Pinnularia angustarea, LM. Fig. 74. Neidiopsis vekhovii, LM. Fig. 75. N. wulffii, LM. Scale bar = 10 µm.
FIGURES 1–18 in Diploneis fenestrata sp. nov. (Bacillariophyta), a new aerophilic diatom species from Zambia, Africa
FIGURES 1–18. Diploneis fenestrata: LM of valves from specimen on holotype (BR 4331; Fig. 13 = holotype specimen) (Lumangwe Falls on the Kalungwishi River in Zambia); specimens at different focal depths, showing size range in valve view. Scale bar = 10 µm.
FIGURES 45–48 in Diploneis fenestrata sp. nov. (Bacillariophyta), a new aerophilic diatom species from Zambia, Africa
FIGURES 45–48. Diploneis fenestrata SEM: type material (sample D-NWU 12-388). Fig. 45.View of whole valve. Fig. 46. View of central area with proximal raphe ends. Fig. 47. Illustration of transapical costae and serrated advalvar edge. Fig. 48. Illustrating distal raphe ends. Scale bars = 10 µm (Fig. 45), 2 µm (Figs 46–48).
FIGURES 41–44 in Diploneis fenestrata sp. nov. (Bacillariophyta), a new aerophilic diatom species from Zambia, Africa
FIGURES 41–44. Diploneis fenestrata SEM: type material (sample D-NWU 12-388). Figs 41–43. External valve view showing square openings present only above longitudinal canal and periphery of opening demarcated by areolae-like structures. Fig. 44. Internal view of whole valve. Scale bars = 1 µm (Figs 41–43), 10 µm (Fig. 44).
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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