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1,986 results for “valve”
FIGURES 266–272. Figs. 266–272. Epithemia guettingeri. Figs. 266–267. SEM external valve view. Figs. 268–270. SEM internal valve view. Fig. 271 in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico
FIGURES 266–272. Figs. 266–272. Epithemia guettingeri. Figs. 266–267. SEM external valve view. Figs. 268–270. SEM internal valve view. Fig. 271. LM valve view. Fig. 272. SEM detail of septa. Scale bar = 1μm.
FIGURES 245–257. Figs. 245–246. Psammodictyon panduriforme var. panduriforme. Fig. 245. SEM valve view and cingular bands. Fig. 246 in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico
FIGURES 245–257. Figs. 245–246. Psammodictyon panduriforme var. panduriforme. Fig. 245. SEM valve view and cingular bands. Fig. 246. LM valve view. Fig. 247. P. rudum. Fig. 248. P. panduriforme var. continuum. Fig. 249. P. cf. panduriforme var. panduriforme. Fig. 250. Nitzschia amabilis. Figs. 251. N. panduriforme var. minor. Fig. 252. Tryblionella coarctata. Figs. 253–256. Nitzschia panduriformis var. continua. Fig. 253. SEM valve view. Figs.254–256 LM valve view. Fig. 257. Nitzschia persuadens. Scale bar: figs. 248–250, 253–257 = 1 μm, figs. 245–247, 251, 252 = 10 μm.
FIGURES 189–201. Fig. 189. Lyrella clavata. Figs. 190–192. L. barbara. Figs. 193–194. Navicula longa. Fig. 195. N. duerrenbergiana. Fig.196. N. zostereti. Fig. 197. N. feuerbornii. Fig. 198. N. pargemina. Figs. 199–201. N. lusoria. Fig. 199. SEM internal valve view. Fig. 200. SEM external valve view. Fig. 201 in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico
FIGURES 189–201. Fig. 189. Lyrella clavata. Figs. 190–192. L. barbara. Figs. 193–194. Navicula longa. Fig. 195. N. duerrenbergiana. Fig.196. N. zostereti. Fig. 197. N. feuerbornii. Fig. 198. N. pargemina. Figs. 199–201. N. lusoria. Fig. 199. SEM internal valve view. Fig. 200. SEM external valve view. Fig. 201. LM valve view. Scale bar: figs. 199 = 1 μm, figs. 189–198, 201= 10 μm.
FIGURES 142–149. Fig. 142. Mastogloia chersonensis. Fig. 143. M. cuneata, SEM internal valve view. Figs. 144–145. M. gibbosa. Fig. 144. SEM valve view. Fig. 145 in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico
FIGURES 142–149. Fig. 142. Mastogloia chersonensis. Fig. 143. M. cuneata, SEM internal valve view. Figs. 144–145. M. gibbosa. Fig. 144. SEM valve view. Fig. 145. LM valve view. Figs. 146–149. M. corsicana. Fig. 146. LM valve view. Figs. 147–148. SEM external valve view. Fig. 149. SEM internal valve view. Scale bar: figs. 142–144, 147–149 = 1 μm, figs. 145, 146 = 10 μm.
FIGURES 33–37. Figs. 33–37. Triceratium favus. Fig. 33. SEM external valve view. Fig. 34 in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico
FIGURES 33–37. Figs. 33–37. Triceratium favus. Fig. 33. SEM external valve view. Fig. 34. SEM external view showing the valve and cingulum and spines. Figs. 35–36. LM external valve view in different foci. Fig. 37. Corner showing labiate processes (arrow) at the base of elevation with ocellus. Scale bar: = 10 μm.
FIGURES 21–26. Figs. 21. Thalassiosira nanolineata, Fig. 21. SEM external valve view. Fig. 21a in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico
FIGURES 21–26. Figs. 21. Thalassiosira nanolineata, Fig. 21. SEM external valve view. Fig. 21a. External opening of two central strutted processes. Fig. 21b. External tube of marginal strutted processes. Figs. 22–25. Psammodiscus nitidus, Fig. 22. SEM internal valve view, note small pore (arrow). Fig. 23. LM external valve view. Fig. 24. SEM external valve view. Fig. 24a. Details of areolae occluded by plated rotae with 2–3 spokes. Fig. 25. LM external valve view. Fig. 26. Thalassiosira eccentrica. Scale bar: figs. 21, 22, 24 = 1 μm, figs. 23, 55, 26 = 10 μm.
FIGURES 133–141. Fig. 133. Mastogloia crucicula var. alternans. Fig. 133. SEM internal valve view. Fig. 133a in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico
FIGURES 133–141. Fig. 133. Mastogloia crucicula var. alternans. Fig. 133. SEM internal valve view. Fig. 133a. SEM detail of partecta. Fig. 134. Cymatoneis cf. margarita. Figs. 135–138. M. crucicula var. crucicula. Fig. 135. LM valve view. Figs. 136–138. SEM internal view. Fig. 139. M. ovulum. Figs. 140–141. M. pseudolatecostata. Scale bar: figs. 133, 134, 136, 138 = 1 μm, figs. 135, 139, 140 = 10 μm.
FIGURES 123–132. Fig. 123. Mastogloia punctatissima. Fig. 124–125. M. pseudolatecostata. Figs. 126–127. M. fimbriata. Fig. 126. SEM valve view. Fig. 127 in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico
FIGURES 123–132. Fig. 123. Mastogloia punctatissima. Fig. 124–125. M. pseudolatecostata. Figs. 126–127. M. fimbriata. Fig. 126. SEM valve view. Fig. 127. LM valve view. Fig. 128. M. urveae. Figs. 129–131. M. binotata. Fig. 132. Licmophora remulus. Scale bar: figs. 124–126, 128, 130 = 1 μm, figs. 123, 127, 129, 131, 132 = 10 μm.
FIGURES 48–56. Figs. 48–50. Plagiogramma wallichianum. Fig. 48. SEM whole valve. Fig. 48a. SEM apical pore field. Fig. 48b in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico
FIGURES 48–56. Figs. 48–50. Plagiogramma wallichianum. Fig. 48. SEM whole valve. Fig. 48a. SEM apical pore field. Fig. 48b. SEM detail of the rotae occluding areolae. Fig. 49. LM frustule in girdle view. Fig. 50. SEM frustule showing epicingulum overlapping hypocingulum. Figs. 51–52. P. rhombicum. Fig. 51. LM valve view. Fig. 52. SEM frustule in girdle view. Fig. 53. P. pulchellum var. pygmaeum. Fig. 54. Dimeregramma minus var. nanum, SEM whole valve. Figs. 55–56. Plagiogramma pulchellum. Fig. 55. SEM valve view. Fig. 56. LM valve view. Scale bar: figs. 48, 50, 52, 54 = 1 μm, figs. 49, 51, 53, 55 = 10 μm.
FIGURES 163–176. Figs. 163–165. Diploneis splendida. Fig. 163. SEM valve view. Figs. 164–165 in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico
FIGURES 163–176. Figs. 163–165. Diploneis splendida. Fig. 163. SEM valve view. Figs. 164–165. LM valve view. Fig. 166. D. crabro. Fig. 167. D. crabro var. dirhombus. Figs. 168–173. D. bomboides. Figs. 168–170, 173. LM valve view. Fig. 171. SEM valve view. Fig. 172. SEM frustule view. Fig. 174. D. chersonensis. Fig. 175. D. bomboides. Fig. 176. D. suborbicularis. Scale bar: figs. 163 = 1 μm, figs. 164–176= 10 μm.
FIGURES 38–47. Figs. 38–41, 44–47. Triceratium reticulum. Figs. 42–43. T. sculptum. Fig. 38. SEM external valve view. Fig. 38a. SEM external view showing the pseudocelli. Figs. 39–47 in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico
FIGURES 38–47. Figs. 38–41, 44–47. Triceratium reticulum. Figs. 42–43. T. sculptum. Fig. 38. SEM external valve view. Fig. 38a. SEM external view showing the pseudocelli. Figs. 39–47. LM different foci in valve view. Scale bar: fig. 38a = 1 μm, figs. 38, 39–47 = 10 μm.
FIGURES 95–108. Figs. 95–96. Cocconeis thalassiana. Fig. 95. SEM raphe–sternum valve. Fig. 96 in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico
FIGURES 95–108. Figs. 95–96. Cocconeis thalassiana. Fig. 95. SEM raphe–sternum valve. Fig. 96. LM sternum valve. Fig. 97 C. lineata. Fig. 98. C. scutellum var. minutissima. Fig. 99, 100, 103–104. C. disculus. Fig. 101. C. placentula var. euglypta. Fig. 102. C. angularipunctata. Fig. 103. SEM valve view. Fig. 104. LM valve view. Fig. 106. C. sovereignii, LM frustule in girdle view. Fig. 107. C. peltoides, SEM internal view. Fig. 108. C. pseudomarginata. Scale bar: figs. 97–104, 106–108 = 1 μm, figs. 95–96 = 10 μm.
FIGURES 150–162. Figs. 150–151. Diploneis smithii, 154–156. Diploneis vacillans. Fig. 150. SEM valve view. Figs. 151, 154–156 in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico
FIGURES 150–162. Figs. 150–151. Diploneis smithii, 154–156. Diploneis vacillans. Fig. 150. SEM valve view. Figs. 151, 154–156. LM valve view. Figs. 152–153. D. litoralis var. clathrata. Fig. 152. SEM internal valve view. Fig. 153. LM valve view. Fig. 157. D. papula. Fig. 158. D. obliqua. Fig. 159. Cocconeiopsis patrickae. Fig. 160. Achnanthes citronella, SEM internal valve view. Fig. 161. Diploneis cf. domblittensis, SEM internal valve view. Fig. 162. Mastogloia pusilla var. subcapitata. Scale bar: figs. 150, 152, 157, 159, 162 = 1 μm, figs. 151, 153–155, 158, 160–161 = 10 μm.
FIGURES 20–25. SEM, internal valve views. Fig. 20 in Halamphora daochengensis sp. nov., a new freshwater diatom species (Bacillariophyceae) from a small mountain lake, Sichuan Province, China
FIGURES 20–25. SEM, internal valve views. Fig. 20. Internal view of entire valve with girdle bands. Fig. 21. Oblique view of valve. Fig. 22, 23. Internal view of valve apex with prominent helictoglossa. Fig. 24. Internal view of valve centre with girdle bands. Fig. 25. Internal view of valve centre with fused helictoglossa. Scale bars = 2 μm (Figs 22, 23), 3 μm (Fig. 25), 5 μm (Figs 20, 21, 24).
FIGURES 27–32. Cocconeis sawensis from Brazil. 27, 28, 30 TEM. 29, 31, 32 SEM. 27. Raphe valve whit valvocopula attached. 28 in Additional morphological features of the epiphytic diatom Cocconeis sawensis Al-Handal & Riaux-Gobin (Cocconeidaceae, Bacillariophyta) from a coastal lagoon, Southern Brazil
FIGURES 27–32. Cocconeis sawensis from Brazil. 27, 28, 30 TEM. 29, 31, 32 SEM. 27. Raphe valve whit valvocopula attached. 28. Detail of fimbriae coinciding with each interstria. 29. Raphe valve with valvocopula attached. Note the valvocopula open. 30. Detail of long fimbriae of unequal length and shape. 31, 32. Internal view of the sternum valve with valvocopula of raphe valve attached. Scale bars = 0.5 μm (Fig. 28), 1 μm (Figs 29–32), 2 μm (Fig. 27).
FIGURES 13–20. Cocconeis sawensis from Brazil. Raphe valves. 13–18. SEM. 19, 20. TEM. 13, 15 in Additional morphological features of the epiphytic diatom Cocconeis sawensis Al-Handal & Riaux-Gobin (Cocconeidaceae, Bacillariophyta) from a coastal lagoon, Southern Brazil
FIGURES 13–20. Cocconeis sawensis from Brazil. Raphe valves. 13–18. SEM. 19, 20. TEM. 13, 15. External view of the valve. 14. Internal view of the valve showing an irregular and raised marginal rim. 16, 17. Detail of the internal valves ends. Note raphe lying in a very narrow raised axial area and distal raphe ending a small helictoglossae. 18. Detail of the central area round and slightly raised with raphe endings deflected in opposite directions. 19. Valve. 20. Detail of hymenes occluding areolae with radial perforations. Scale bars = 200 nm (Fig. 20), 1 μm (Figs 16–18), 2 μm (Figs 13, 14, 15, 19).
FIGURES 7–12. Cocconeis sawensis from Brazil. Sternum valves. 7–11. SEM. 12. TEM. 7, 8 in Additional morphological features of the epiphytic diatom Cocconeis sawensis Al-Handal & Riaux-Gobin (Cocconeidaceae, Bacillariophyta) from a coastal lagoon, Southern Brazil
FIGURES 7–12. Cocconeis sawensis from Brazil. Sternum valves. 7–11. SEM. 12. TEM. 7, 8. Epiphytic on Cladophora sp. 8. Note valve convexity, slightly concave along the axial area. 9, 10. External view showing the narrow sternum. 11. Internal view. Detail of the sternum thickened and raised. 12. Valve. Scale bars = 2 μm (Figs 9, 12), 5 μm (Figs 8, 10, 11), 10 μm (Fig. 7).
FIGURES 32–39. Odontidium himalongissimum. SEM. Figs 32–34. Valve views. Fig. 35. Apical pore field and rimoportula. Figs 36–37 in The genus Odontidium (Bacillariophyta) in the Himalaya-a preliminary account of some taxa and their distribution
FIGURES 32–39. Odontidium himalongissimum. SEM. Figs 32–34. Valve views. Fig. 35. Apical pore field and rimoportula. Figs 36–37. Internal view of valves. Figs 38–39. Frustules in girdle view. NMW.C.2007.006.P67: tributary to the Pindar River, Kumaon, India. Scale bars = 5 μm (Figs 32–34), 4 μm (Figs 36, 38, 39), 2 μm (Figs 35, 37).
FIGURES 23–31 in A new species of Cymbella (Cymbellaceae, Bacillariophyceae) from China, possessing valves with both uniseriate and biseriate striae
FIGURES 23–31. Cymbella distalebiseriata sp. nov., external view, SEM. 23–31. Nine apices showing details of biseriate striae. Scale bars = 5 μm.
FIGURES 19–22 in A new species of Cymbella (Cymbellaceae, Bacillariophyceae) from China, possessing valves with both uniseriate and biseriate striae
FIGURES 19–22. Cymbella distalebiseriata sp. nov., external view, SEM. 19–22. Four valves showing valve outline, raphe shape and some biseriate striae distributed near both apices (arrows). Scale bars =10 μm.
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