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FIGURES 169–171. Eunotia paludosa Grunow. Figs 169 & 170 in The identity of Eunotia paludosa Grunow 1862 (Eunotiaceae, Bacillariophyta), a revision, and the description of three new species of Eunotia Ehrenberg

FIGURES 169–171. Eunotia paludosa Grunow. Figs 169 & 170. Original drawings from the Grunow collection (Herbarium of the Natural History Museum, W, Austria) representing valve drawings made by Grunow from sample 522, the type sample for E. paludosa. Fig. 171. Published drawings of E. paludosa in Van Heurck (1881), pl. XXXIV, fig. 9, based on Grunow's drawings. Note the indication "522 Mandling" added to the drawing by Grunow.

FIGURES 127–161 in The identity of Eunotia paludosa Grunow 1862 (Eunotiaceae, Bacillariophyta), a revision, and the description of three new species of Eunotia Ehrenberg

FIGURES 127–161. Eunotia zackenbergensis Goeyers, Van de Vijver & Lange-Bertalot, sp. nov. LM images taken from the holotype material (sample M446, Zackenberg, Greenland, BR-4718). Fig. 127. Single valve in girdle view. Figs 128–161. LM views of the population arranged in decreasing length. Scale bar represents 10 µm.

FIGURES 162–168 in The identity of Eunotia paludosa Grunow 1862 (Eunotiaceae, Bacillariophyta), a revision, and the description of three new species of Eunotia Ehrenberg

FIGURES 162–168. Eunotia zackenbergensis Goeyers, Van de Vijver & Lange-Bertalot, sp. nov. SEM images taken from the holotype material (sample M446, Zackenberg, Greenland). Fig. 162. External view of a valve in girdle view. Note the course of the raphe branches on the mantle. Fig. 163. SEM external view in valve face view showing the short terminal raphe fissures and the absence of spines. Fig. 164. External detail of a valve apex focusing on the terminal raphe fissures. The external rimoportula opening is not discernible. Fig. 165. SEM external detail of a valve apex in girdle view, focusing on one of the raphe branches and the areolae on the apex. Fig. 166. Internal view in valve face view. Fig. 167. SEM internal detail of a valve apex showing the helictoglossa and the rimoportula. Fig. 168. SEM internal detail of a valve apex showing the helictoglossa. Scale bars indicate 10 µm for figs 162, 163 & 166, 1 µm for figs 164, 165, 167 & 168.

FIGURES 85–119 in The identity of Eunotia paludosa Grunow 1862 (Eunotiaceae, Bacillariophyta), a revision, and the description of three new species of Eunotia Ehrenberg

FIGURES 85–119. Eunotia insularum Van de Vijver & Lange-Bertalot, sp. nov. LM images taken from the holotype material (sample BM290, Ile de la Possession, Iles Crozet, BR-4717). Figs 85–87. LM views of frustules in girdle view. Figs 87–119. Views of the population arranged in decreasing length. Scale bar represents 10 µm.

FIGURES 120–126 in The identity of Eunotia paludosa Grunow 1862 (Eunotiaceae, Bacillariophyta), a revision, and the description of three new species of Eunotia Ehrenberg

FIGURES 120–126. Eunotia insularum Van de Vijver & Lange-Bertalot, sp. nov. SEM images taken from the holotype material (sample BM290, Ile de la Possession, Iles Crozet). Fig. 120. External view of a frustule in girdle view showing the ventral side with the raphe branches. Fig. 121. SEM external view of a frustule in girdle view showing the dorsal side lacking spines. Fig. 122. External view in valve face view showing the short terminal raphe fissures and the absence of spines. Fig. 123. SEM external detail of a valve apex in girdle view, focusing on one of the raphe branches and the areolae on the apex. The arrow indicates the external rimoportula opening. Fig. 124. SEM external detail of a valve apex focusing on the terminal raphe fissures. The external rimoportula opening is not discernible. Fig. 125. SEM internal view in valve face view. The arrow indicates the rimoportula. Fig. 126. SEM internal detail of a valve apex showing the helictoglossa and the rimoportula (arrow). Scale bars indicate 10 µm for figs 120–122, 125, 1 µm for figs 123, 124 & 126.

FIGURES 37–81 in The identity of Eunotia paludosa Grunow 1862 (Eunotiaceae, Bacillariophyta), a revision, and the description of three new species of Eunotia Ehrenberg

FIGURES 37–81. Eunotia sphagnicola Van de Vijver, A.Mertens & Lange-Bertalot, sp. nov. LM images taken from the holotype material (sample D283, Egelmeer, Veenendaal, the Netherlands, BR-4716). Figs 37–39. LM views of frustules in girdle view. Figs 40–81. LM views of the population arranged in decreasing length. Scale bar represents 10 µm.

FIGURES 29–36 in The identity of Eunotia paludosa Grunow 1862 (Eunotiaceae, Bacillariophyta), a revision, and the description of three new species of Eunotia Ehrenberg

FIGURES 29–36. Eunotia paludosa Grunow SEM images taken from the lectotype material (Grunow sample 522, Mandling, Styria, Austria). Fig. 29. External view of a frustule in girdle view showing the ventral side with the raphe branches. Fig. 30. SEM external view of a frustule in girdle view showing the dorsal side with the clear presence of spines. Figs 31–32. External detail of a valve apex, focusing on the terminal raphe fissures. Note spines on the dorsal side. Fig. 33. SEM external detail of dorsal spines near the middle of the valve. Fig. 34. Internal view in valve face view. The dorsal spines are clearly visible. The arrow indicates the presence of the rimoportula. Fig. 35. SEM internal detail of a valve apex showing helictoglossa. Fig. 36. SEM internal detail of a valve apex showing helictoglossa and rimoportula (arrow). Scale bars indicate 10 µm for figs 29, 30 & 34, 1 µm for figs 31–33, 35 & 36.

FIGURES 1–28 in The identity of Eunotia paludosa Grunow 1862 (Eunotiaceae, Bacillariophyta), a revision, and the description of three new species of Eunotia Ehrenberg

FIGURES 1–28. Eunotia paludosa Grunow LM images taken from the isolectotype (Grunow sample 522, Mandling, Styria, Austria, BR-4715). Figs 1–23. LM views of the population arranged in decreasing length. The arrows indicate the presence of dorsal spines. Figs. 24–28. LM views of frustules in girdle view. Scale bar represents 10 µm.

FIGURES 37–40. 37–38. Eunotia luna Ehrenberg. 37 in Taxonomic revision of Eunotia luna var. aequalis f. paucistriata Frenguelli and E. luna var. aequalis f. major Frenguelli: analysis of type material, lectotypification and current taxonomic status

FIGURES 37–40. 37–38. Eunotia luna Ehrenberg. 37. Original figure by Ehrenberg (1854, pl. 15/A, fig. 58a–b). 38. Original figure by Ehrenberg (1854, pl. 33/12, fig. 15). 39–40. Eunotia luna var. aequalis Hustedt. Original figures by Hustedt in Schmidt et al. (1913, pl. 286, figs 35, 40). Scale bars = 10 µm (Figs 37–39), 5 µm (Fig. 40).

FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20 in Taxonomic revision of Eunotia luna var. aequalis f. paucistriata Frenguelli and E. luna var. aequalis f. major Frenguelli: analysis of type material, lectotypification and current taxonomic status

FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25).

FIGURES 1–15. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. 1 in Taxonomic revision of Eunotia luna var. aequalis f. paucistriata Frenguelli and E. luna var. aequalis f. major Frenguelli: analysis of type material, lectotypification and current taxonomic status

FIGURES 1–15. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. 1. Eunotia luna var aequalis Hustedt sensu Frenguelli. Original drawing of Frenguelli. 2. E. luna var. aequalis f. paucistriata Frenguelli. Original drawing. 3–15. LM. Size diminution series, note the variability in striae arrangement. 4, 8–9, 11. Specimens matching E. luna var. aequalis. 5, 13, 15. Specimens matching to E. luna var. aequalis f. paucistriata. 3, 6–7, 10, 12, 14. Specimens that could not be undoubtedly assigned to one of the mentioned taxa. 1–13, 15. Specimens from Series 268. 13. Lectotype of E. luna var. aequalis f. paucistriata. 14. Specimen from Series 261. Scale bars = 10 µm.

FIGURES 27–36. Eunotia luna var. aequalis f. major Frenguelli. 27 in Taxonomic revision of Eunotia luna var. aequalis f. paucistriata Frenguelli and E. luna var. aequalis f. major Frenguelli: analysis of type material, lectotypification and current taxonomic status

FIGURES 27–36. Eunotia luna var. aequalis f. major Frenguelli. 27. Original drawing of Frenguelli. 28–33. LM. Size diminution series. 34–36. SEM. Internal views. 34. General view of a tilted valve. 35. Detail of valve center showing the arrangement of striae. 36. Detail of the valve apex showing mantle areolation pattern in external view; note the raphe on the mantle in external view. 28–29. Specimen from Series 264. 30–36. Specimens from Series 265. 32. Lectotype of E. luna var. aequalis f. major. Scale bar = 10 µm (Figs 27–34), 5 µm (Figs 35–36).

FIGURES 22–27 in Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic

FIGURES 22–27. SEM micrographs of Eunotia petasum sp. nov. from the Giraffe Pipe fossil locality. 22. Dorsal view of a frustule showing the continuation of the striae from the valve face onto the mantle. 23. Ventral view of a valve depicting the raphe and reduced striae, often consisting of only 1–2 pores. 24. Interior view of a valve showing the continuation of the striae from the dorsal mantle onto the valve face. Striae on the ventral mantle are often reduced to random pores. 25. Exterior view of a valve depicting the narrow and protracted end and the distal raphe fissure. 26, 27. Internal views showing the striae, the open nature of the pores, the protracted apex, and the small rounded helictoglossa. Scale bars = 5 µm (Figs 22–26), 10 µm (Fig. 27).

FIGURES 15–21 in Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic

FIGURES 15–21. LM Micrographs of Eunotia petasum sp. nov. from the Giraffe Pipe fossil locality. Figure 17 is the type specimen circled on slide "GP 15-3-75D, LM5" (CANA 129308). Figure 21 corresponds to the isotype specimen circled on slide "GP 15-3-75 LM4" in P. Siver's collection. Scale bar = 10 µm.

FIGURES 9–14 in Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic

FIGURES 9–14. SEM micrographs of Eunotia giraffensis sp. nov. from the Giraffe Pipe fossil locality. 9, 11. Close-ups of the end of a valve face showing the straight distal raphe end and the closer-spaced striae at the valve apex. 10, 12. Internal views of the helictoglossa and distal raphe end. Note the extended hyaline region surrounding the helictoglossa, thickened margin of the valve around the apex, densely-spaced striae on the mantle below the raphe, and the presence of a rimoportula. 13, 14. Girdle views of the ventral mantle depicting the position of the raphe, hyaline region surrounding the raphe, and the densely-spaced striae on the mantle below the raphe. Scale bars = 2 µm (Figs 9–12, 14), 3 µm (Fig. 13).

FIGURES 1–8 in Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic

FIGURES 1–8. LM micrographs of Eunotia giraffensis sp. nov. from the Giraffe Pipe fossil locality. Figure 5 is the isotype specimen circled on slide "GP 16-3-42 C" in P. Siver's collection. Figure 7 corresponds to the type specimen circled on slide "GP 16-3-42 B" (CANA 129307). Scale bar = 10 µm.

FIGURES 36–41 in Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic

FIGURES 36–41. SEM micrographs of Eunotia pseudonaegelii sp. nov. from the Giraffe Pipe fossil locality. 36, 38, 40. Exterior views of the end of a valve showing the position of the distal raphe end that extends only a short distance onto the valve face. Note the small spines along the dorsal margin and apex. 37, 39. Internal views of the distal raphe end, helictoglossa and position of the well-developed rimoportula. Note the shallow depth of the mantle. 41. Internal view depicting continuation of the striae on the valve face onto both the ventral mantle and the dorsal mantle. Note the spines along the dorsal valve margin. Scale bars = 2 µm (Figs 36–39, 41), 3 µm (Fig. 40).

FIGURES 28–35 in Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic

FIGURES 28–35. LM micrographs of Eunotia pseudonaegelii sp. nov. from the Giraffe Pipe fossil locality. Figure 31 corresponds to the type specimen circled on slide "GP 16-3-42E" (CANA 129309). Scale bar = 10 µm.