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Figs 24–32. Mastogloia belaensis M in Morphology of two Mastogloia species (Bacillariophyta) from Lac de Guiers (Senegal) and comparison with the type material of M. braunii

Figs 24–32. Mastogloia belaensis M.Voigt. Light micrographs (LM) of valves from the Lac de Guiers population (Van de Vijver sample SEN-42). 24–28. LM views of several smaller valves showing variation in valve size and shape. 29–30. LM views of the partectal ring with the partecta. 31. LM view of an entire valve with removed partectal ring showing the pseudosepta (arrows). 32. Entire frustule in girdle view. Scale bar: 10 μm.

Fig. 69 in Morphology of two Mastogloia species (Bacillariophyta) from Lac de Guiers (Senegal) and comparison with the type material of M. braunii

Fig. 69. World distribution of Mastogloia braunii s. lat. according to the literature. Circles: recent records. Squares: fossil records. Filled symbols indicate confirmed (illustrated) records. 331 locations were found based on 271 references.

Figs 1–5 in Morphology of two Mastogloia species (Bacillariophyta) from Lac de Guiers (Senegal) and comparison with the type material of M. braunii

Figs 1–5. Mastogloia braunii Grunow. Light micrographs (LM) of valves from the type population (Grunow 23583 – capsule 0645, Vienna, Austria). 1–3. LM views of 3 valves showing variation in valve size and shape. The arrows in Fig. 2 indicate shortened striae near the central area. 3–4. Same valve taken at different foci. 4–5. LM views of the partectal ring with the partecta. Scale bar: 10 μm.

Figs 46–55 in Morphology of two Mastogloia species (Bacillariophyta) from Lac de Guiers (Senegal) and comparison with the type material of M. braunii

Figs 46–55. Mastogloia senegalensis Van de Vijver, Fofana, Sow & Ector sp. nov. Light micrographs of valves from the Lac de Guiers type population (Van de Vijver sample SEN-42). 46–51. LM views of several specimens showing variation in valve size and shape (the arrows in Fig. 46 show typical bifurcating striae near the central area). 52–53. LM views of the partectal ring with the partecta. 54. LM view of an entire valve with removed partectal ring showing the pseudosepta. 55. LM view of an entire valve with removed partectal ring showing the valve interior. Scale bar: 10 μm.

Figs 56–59 in Morphology of two Mastogloia species (Bacillariophyta) from Lac de Guiers (Senegal) and comparison with the type material of M. braunii

Figs 56–59. Mastogloia senegalensis Van de Vijver, Fofana, Sow & Ector sp. nov. Scanning electron micrographs (SEM) of valves from the Lac de Guiers type population (Van de Vijver sample SEN-42). 56. SEM girdle view of an entire frustule showing the partectal pores and the mantle areolae. 57. SEM external view of an entire valve with typical undulating raphe branches. 58. SEM external detail of the apex and the axial area with the depressed grooved on both sides of the raphe. 59. SEM external detail of the valve mantle. Scale bars: 10 µm.

Figs 39–45. Mastogloia belaensis M in Morphology of two Mastogloia species (Bacillariophyta) from Lac de Guiers (Senegal) and comparison with the type material of M. braunii

Figs 39–45. Mastogloia belaensis M.Voigt. Scanning electron micrographs (SEM) of valves from the Lac de Guiers population (Van de Vijver sample SEN-42). 39. SEM internal view of an entire valve with the typical partectal ring. 40–41. SEM internal details of the partectal ring near the valve apices showing the cleft with the lacunae. 42. SEM internal detail of the central area. 43. SEM internal detail of the valve apex with the pseudoseptum. 44. SEM internal detail of the partecta showing the partectal walls with 2–4 series of small, rounded pores. 45. SEM internal view of the inner areolae arranged in groups of 4–8 per pseudoloculus. Scale bars: 39–43 = 10 µm; 44 = 5 µm; 45 = 1 µm.

Figs 66–68 in Morphology of two Mastogloia species (Bacillariophyta) from Lac de Guiers (Senegal) and comparison with the type material of M. braunii

Figs 66–68. Mastogloia baldjikiana Grunow. Light micrographs (LM) of valves from slide 545 (Baldjick, Types du Synopsis des diatomées de Belgique, Van Heurck collection, BR). 66–67. Same valve taken at different foci. 66, 68. LM views of 2 valves showing variation in valve size and shape. 67. LM view of the partectal ring with the partecta. Scale bar: 10 μm.

Figs 17–23. Mastogloia belaensis M in Morphology of two Mastogloia species (Bacillariophyta) from Lac de Guiers (Senegal) and comparison with the type material of M. braunii

Figs 17–23. Mastogloia belaensis M.Voigt. Light micrographs (LM) of valves from the Lac de Guiers population (Van de Vijver sample SEN-42). LM views of several specimens showing variation in valve size and shape. Scale bar: 10 μm.

Figs 12–16 in Morphology of two Mastogloia species (Bacillariophyta) from Lac de Guiers (Senegal) and comparison with the type material of M. braunii

Figs 12–16. Mastogloia braunii Grunow. Scanning electron micrographs (SEM) of valves from the type population (Grunow 23583 – capsule 0645, Vienna, Austria). 12. SEM internal view of an entire valve with the partectal ring and series of partectal pores. 13. SEM internal detail of the partecta with the flange connecting the partecta with the valve margins. 14. SEM internal detail of the partecta showing the partectal walls with 2–4 series of small, rounded pores. 15–16. SEM internal details of the partectal ring near the valve apices showing the cleft with the lacunae. Scale bars: 12 = 1 µm; 13–16 = 10 µm.

Figs 60–65 in Morphology of two Mastogloia species (Bacillariophyta) from Lac de Guiers (Senegal) and comparison with the type material of M. braunii

Figs 60–65. Mastogloia senegalensis Van de Vijver, Fofana, Sow & Ector sp. nov. Scanning electron micrographs (SEM) of valves from the Lac de Guiers type population (Van de Vijver sample SEN-42). 60. SEM internal view of an entire valve with the partectal ring. 61–62. SEM internal details of the partectal ring near the valve apices showing the cleft on each apex. 63. SEM internal detail of the central area and part of the partectal ring. 64. SEM internal detail of the partecta showing the partectal walls with 2–4 series of small, rounded pores loosely aggregated in distinct plaques. 65. SEM internal view of a valve apex without the partectal ring (note the small pseudoseptum). Scale bars: 60–63, 65 = 10 µm; 64 = 1 µm.

Figs 33–38. Mastogloia belaensis M in Morphology of two Mastogloia species (Bacillariophyta) from Lac de Guiers (Senegal) and comparison with the type material of M. braunii

Figs 33–38. Mastogloia belaensis M.Voigt. Scanning electron micrographs (SEM) of valves from the Lac de Guiers population (Van de Vijver sample SEN-42). 33. SEM girdle view of an entire frustule showing the partectal pores and the mantle areolae. 34. SEM external view of an entire valve with typical undulating raphe branches. 35. SEM external detail of the central area. 36. SEM external detail of the valve apex. 37. SEM external detail of the apices and girdle bands of an entire frustule. 38. SEM external detail of the valve mantle with the transapically elongated mantle areolae and the row of rounded pseudoloculi on the valve face/mantle junction. Scale bars: 10 µm.

opencc-by-4.0Dec 2015View details →

Figures 51–70. Figs. 51–55. Mastogloia emarginata. Figs 51-54 in Benthic marine diatom flora of Guam: new records, redescription of Psammodictyon pustulatum n. comb., n. stat., and three new species (Colliculoamphora gabgabensis, Lauderia excentrica, and Rhoiconeis pagoensis)

Figures 51–70. Figs. 51–55. Mastogloia emarginata. Figs 51-54. LM views of two specimens focused on valve face and valvocopula, arrowhead indicates one of the prominent exit pores of the partecta (GU44AR-2) (DIC). Fig. 55. Internal view of valve and valvocopula (GU55B-4) (SEM). Figs 56, 57. Mastogloia ovulum specimen at two focal planes (GU44K-6) (DIC). Figs 58-61. Mastogloia matthaei, two specimens at two focal planes (GU52P-2) (DIC). Figs. 62, 63. Mastogloia obliqua, valve at two focal planes (GU66F-4) (DIC). Figs. 64–67. Mastogloia peracuta (GU44AP-9). Figs 64, 65. Specimen at two focal planes (DIC). Figs 65, 66, External views of two specimens in SEM. Figs 68–71. Mastogloia pumila. Figs 68, 69. Specimen in DIC at two focal planes (GU52P-1; catalog # GUD002950). Fig. 70. Internal aspect of valve and valvocopula (GU52P-9) (SEM). Fig. 71. Frustule showing both internal and external valve faces. Scale bars: Figs 51–69 = 5 µm, Figs 70, 71 = 3 µm.

opencc-by-4.0Jun 2024View details →

Figures 65–70. Mastogloia. Figs 65, 66. Mastogloia ovata exterior and interior valve faces. Fig. 67 in Marine benthic diatoms of Guam: new records, Dictyoneis apapae sp. nov., and updates to the checklist

Figures 65–70. Mastogloia. Figs 65, 66. Mastogloia ovata exterior and interior valve faces. Fig. 67. Mastogloia pseudolatecostata (Bikar Atoll, Marshall Is.), external valve face with part of valvocopula showing partecta. Figs. 68–70. Mastogloia cf. pisciculus. Fig.68. LM (DIC) with foci on valve face and partecta Arrows on this and next image point to longitudinal rib bisecting the inner zone. Fig. 69. External surface, SEM. Fig. 70. Internal valve face and partecta, also showing partly double row of areolae (arrow). Scale bars: Figs 67, 68 = 10 µm, Figs 65, 66, 69, 70 = 5 µm.

opennotspecifiedJun 2019View details →

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.

opennotspecifiedJun 2019View details →

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.

opennotspecifiedJun 2019View details →

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 53–60 in Comparison of two new species of Mastogloia (Bacillariophyceae) with other small members of section Ellipticae

FIGURES 53–60. Type specimens in pairs of the new species of Mastogloia showing first the striation and second the partectal ring, LM. (53–56) M. matthaei, CANA 86491, holotype specimen in Figs 55, 56; (57–60) M. stellae, CANA 86492, holotype specimen in Figs 59, 60.

FIGURES 61–64 in Comparison of two new species of Mastogloia (Bacillariophyceae) with other small members of section Ellipticae

FIGURES 61–64. Mastogloia ovulum, SEM, type material (BRM-AS40, Miang Besar, Borneo) in the Hustedt collection at Bremerhaven. (61) External view of valve showing sinuous raphe branches and apically elongated areolae; (62) External view of apex showing apically elongated areolae and distal raphe ending with no terminal fissure; (63) Internal valve view showing bilobed partecta (arrowhead) up to the apex; (64) Internal view of apex showing partecta with linear rows of fine pores.

FIGURES 21–28 in Comparison of two new species of Mastogloia (Bacillariophyceae) with other small members of section Ellipticae

FIGURES 21–28. Mastogloia ovalis, SEM (DISVAR-ANS2SP17, Siladen, Indonesia). (21) External view of valve showing straight raphe branches; (22) External view of central region showing proximal raphe endings; (23) External view of tilted valve showing partectal pore (arrowhead); (24) Internal valve view showing well-marked bilobed partecta (arrowhead); (25) Internal view of central region showing proximal raphe endings; (26) Internal view of valve showing partecta with linear rows of fine pores; (27) Internal view of tilted valve showing partectal pores (arrowhead); (28) External view of tilted valve showing rounded areolae covered by tongue-like vela with horseshoe-shaped edges.

FIGURES 1–8 in Comparison of two new species of Mastogloia (Bacillariophyceae) with other small members of section Ellipticae

FIGURES 1–8. Mastogloia binotata, SEM (DISVAR-ANC59SP43, Calabria, Italy). (1) External view of valve with straight raphe branches; (2) External view of the central region showing raphe endings and thin fascia; (3) External view of apex showing distal raphe ending with no terminal fissure; (4) Internal valve view showing one large, rectangular and central partectum (arrowhead) on each side of the valvocopula; (5) Internal valve view showing raised central nodule; (6) Internal view of valve margin showing flange (arrowhead) attaching the partectum to the valvocopula; (7) Oblique view of tilted specimen showing partectal pore (arrowhead) on open valvocopula; (8) External view showing sunken rounded areolae on the valve face covered by vela with rotae.