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Figs 39–44. Cocconeis diaphana W in Cocconeis molesta Kütz., C. diaphana W.Sm. and C. dirupta W.Greg. (Bacillariophyta): type material, ambiguities and possible synonymies

Figs 39–44. Cocconeis diaphana W.Sm. isolectotype SEM illustration. Mica labelled as "Cocconeis diaphana n.sp., Jersey, Aug. 14. 1852", deposited in the Van Heurck collection in Meise (BR). SV external view with a reduced central area (39, arrow) and striae composed of transversally elongated alveoli (39). SV internal view (40). Note the SV valvocopula (SVVC) with a smooth edge (40, arrowhead). Detail of the SV apex (41). Detail of a broken SV showing the double layered structure of the alveoli (42). RV external view with the central oblong-elongate central area reaching less than ¼ of the valve width (43, arrow). RV internal view with a low and straight helictoglossa (44, arrow) and the RV valvocopula (RVVC) with a smooth edge (44, arrowhead). Scale bars = 10 µm (39, 40, 43–44), 2 µm (41), 1 µm (42).

Figs 9–14 in Cocconeis molesta Kütz., C. diaphana W.Sm. and C. dirupta W.Greg. (Bacillariophyta): type material, ambiguities and possible synonymies

Figs 9–14. Illustration of the type slides. 9. Cocconeis molesta Kütz.: F.T. Kützing collection, no. 259, BM 18381. 10. Cocconeis molesta: H.F. Van Heurck collection, no. IX-43-A13. 11. Cocconeis diaphana W.Sm.: W. Smith collection, "Jersey, Pontac" August 1852, BM 23161. 12. Cocconeis diaphana: F.C.S. Roper collection, "Sidmouth", no. 1212, BM 19589. 13. Cocconeis diaphana: H.F. Van Heurck collection, "Sidmouth", no. VI 45B10. 14. Cocconeis dirupta W.Greg.: R.K. Greville collection, Arran 56, BM 1420.

Figs 35–38. Cocconeis dirupta W in Cocconeis molesta Kütz., C. diaphana W.Sm. and C. dirupta W.Greg. (Bacillariophyta): type material, ambiguities and possible synonymies

Figs 35–38. Cocconeis dirupta W.Greg. from BM 1420. 37. Lectotype illustration. SV sternum lanceolate with apices slightly bent in opposite directions (36), one SV stria lacking on one side (35, 36, arrow), RV striae strongly radiate, RV fascia narrow and extended (38, arrows), helictoglossae deflected in opposite directions (37, arrowheads) and raphe slightly sigmoid (37). Scale bars = 10 µm.

Figs 27–34. Cocconeis diaphana W in Cocconeis molesta Kütz., C. diaphana W.Sm. and C. dirupta W.Greg. (Bacillariophyta): type material, ambiguities and possible synonymies

Figs 27–34. Cocconeis diaphana W.Sm. "Sidmouth" (var. β). 27–32. From VI-45-B10 (H.F. Van Heurck collection). One SV stria lacking on one side, or both sides (27, arrow, 28–29), RV fascia narrow and extended (30, arrowheads), raphe slightly sigmoid (31, arrowhead), proximal raphe endings robust (30–32). 33–34. From BM 19589, SV sternum in two lanceolate parts (33, arrowhead), helictoglossae deflected in opposite directions (34, arrowheads). Scale bars = 10 µm.

Figs 1–8. Original drawings. 1 in Cocconeis molesta Kütz., C. diaphana W.Sm. and C. dirupta W.Greg. (Bacillariophyta): type material, ambiguities and possible synonymies

Figs 1–8. Original drawings. 1. Cocconeis molesta Kütz. (Kützing 1844, pl. 5, fig. 7). 2–3. Cocconeis diaphana W.Sm. (Smith 1853, pl. 30): 2. var. β. 3. type C. diaphana var. diaphana. 4. Cocconeis dirupta W.Greg. (Gregory 1857, pl. 9). 5–8. Cocconeis molesta var. crucifera Grunow ex Cleve (Van Heurck 1880–1885, pl. 30): 5–6. f. minor. 7–8. f. major.

Figs 22–27 in Two new marine species of Cocconeis (Bacillariophyceae) from the west coast of Sweden

Figs 22–27. SEM images of C. magnoareolata Al-Handal, Riaux-Gob., R.Jahn & A.K.Wulff sp. nov. (BGBM, slide B 40 0043104). 22, 25–26. External view of the outline and stria density of the RV. 23–24. Internal view of the RV exhibiting the slightly raised central area and the submarginal rim. 27. Enlarged part of the external face of raphe valve showing RV hymenes with a row of short marginal slits (arrow).

Figs 16–21 in Two new marine species of Cocconeis (Bacillariophyceae) from the west coast of Sweden

Figs 16–21. SEM images of C. magnoareolata Al-Handal, Riaux-Gob., R.Jahn & A.K.Wulff sp. nov. (BGBM, slide B 40 0043104). 16. Internal view of the SV. 17-18. External view of the SV, showing subquadrangular areolae. 19. Hymenes of the SV arranged as slits on the margin of the areolae (arrows). 20. Abvalvar side of the SV valvocopulae with short fimbriae (arrow). 21. Open valvocopulae of the SV with numerous serrate fimbriae.

Figs 10–15 in Two new marine species of Cocconeis (Bacillariophyceae) from the west coast of Sweden

Figs 10–15. SEM images of Cocconeis vrangoensis Al-Handal & Riaux-Gob. sp. nov. (BGBM, slide B 40 0043105). 10–12. SV. 13–15. Internal side of the RV, showing variations in valves size and outline. Scale bar: 10 µm.

Figs 37–45 in Two new marine species of Cocconeis (Bacillariophyceae) from the west coast of Sweden

Figs 37–45. SEM images of C. vrangoensis Al-Handal & Riaux-Gob. sp. nov. (BGBM, slide B 40 0043105). 37–39. External RV side showing uniseriate striae on valve face and bi- to triseriate striae on valve margin, as well as variation in valve outline, arrow on Fig. 36 points to the marginal hyaline area. 40–42. Internal RV side showing submarginal rim and marginal areolae, arrow on Fig. 41 points to the folded mantle. 43. Areolae with radiate marginal perforations of the hymens (arrow). 44. Abvalvar side of the valvocopulae showing shape of fimbriae, with intervalary short fimbriae (arrow). 45. Enlarged part of the abvalvar side of the valvocopula with an oblong papillae (arrow).

Figs 2–9 in Two new marine species of Cocconeis (Bacillariophyceae) from the west coast of Sweden

Figs 2–9. LM images. 2–4. RV of C. magnoareolata Al-Handal, Riaux-Gob., R.Jahn & A.K.Wulff sp. nov., showing variations in size and valve outline (BGBM, slide B 40 0043104). 5–7. SV of C. magnoareolata sp. nov. (BGBM, slide B 40 0043104). 8–9. SV and RV of C. arenicola Ryznik (ANSP, slide no. 62634). Scale bars: 10 µm.

Figs 28–36 in Two new marine species of Cocconeis (Bacillariophyceae) from the west coast of Sweden

Figs 28–36. SEM images of C. vrangoensis Al-Handal & Riaux-Gob. sp. nov. (BGBM, slide B 40 0043105). 28–29. Internal view of the SV. 30. External view of the SV. 31. Enlarged section of the marginal part of showing areola structure. 32. Areolae occluded by hymenes, internal side. 33. Radial arrangement of areolae, external side. 34. Advalvar side of the valvocopula showing shape of fimbria. 35. Abvalvar side of valvocopula. 36. Closed and strong valvocopula with fimbriae.

Fig. 1 in Two new marine species of Cocconeis (Bacillariophyceae) from the west coast of Sweden

Fig. 1. Map of the west coast of Sweden and location of sampling site, Vrångö Island (black circle).

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Figures 39–43. Figs. 39–41. Cocconeis carinata. Fig. 39 in Marine benthic diatoms of Guam: new records, Dictyoneis apapae sp. nov., and updates to the checklist

Figures 39–43. Figs. 39–41. Cocconeis carinata. Fig. 39. Cluster of cells in LM. Fig. 40. Sternum valve. Fig. 41. Raphe valve. Figs. 42, 43. Coscinodiscus hauckii in LM and SEM. Scale bars: Figs 39, 42 = 10 µm, Fig. 43 = 5 µm, Figs 40, 41 = 1 µm.

FIGURES 106, 107 in Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea

FIGURES 106, 107. SEM micrographs of Cocconeis species (11). Figs 106, 107. Cocconeis schmidtii, the internal view of SV (Fig. 106), the external view of RV (Fig. 107). Scale bars = 2 μm (Figs 106, 107).

FIGURES 88–93 in Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea

FIGURES 88–93. SEM micrographs of Cocconeis species (8). Figs 88, 89. C. pseudomarginata var. intermedia, the external view (Fig. 88) and internal view of SVs (Fig. 89). Fig. 90. C. dirupta var. flexella, the external valve of SV. Figs 91–93. C. cf. diruptoides, the external view of SVs (Figs 91, 92), and the internal view of RV (Fig. 93). Scale bars = 5 μm (Figs 88, 89), 2 μm (Figs 90, 92), 1 μm (Fig. 93).

FIGURE 2 in Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea

FIGURE 2. Field images of two seaweeds, Melanothamnus harlandii (A, B) and Gelidium elegans (C, D), which are representative ones among host plants and were collected in St. 1.

FIGURES 25–44 in Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea

FIGURES 25–44. LM micrographs of Cocconeis species (2). Figs 25, 26. Cocconeis cf. diruptoides, RV (Fig. 25) and SV (Fig. 26). Figs 27–32. C. dirupta var. dirupta, SVs (Figs 27–31) and RV (Fig. 32). Figs 33–37. C. dirupta var. flexella, SVs (Figs 34–36) and RVs (Figs 33, 37). Figs 38–41. C. delicata, RVs (Figs 38) and SVs (Figs 39, 40, 41). Figs 42–44. C. convexa, SVs (Figs 42, 43) and RV (Fig. 44). Scale bar = 10 μm (Figs 25–44).

FIGURE 1 in Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea

FIGURE 1. Map of Jeju Island (dotted square), the southernmost regions of Korea (left), the four localities for diatom samplings in Seogwipo coast of Jeju Island (right). St. 1: A partly closed water body surrounded by volcanic rocks in the coast, a kind of shallow pseudo-lagoon with a lot of seaweeds (a representative point, 33o18'N 126o49'E). St. 2: As a rocky coast, there are small pools on rocks after high tide (33o25'N 126o55'E). St. 3: A large open lagoon where seawater moves at low and high tide through one entrance (33o27'N 126o55'E). St. 4: A lake in coast, a field of reeds in the mouth area, where many migratory birds flock (33o30'N 126o53'E).

FIGURES 69–76 in Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea

FIGURES 69–76. LM micrographs of Cocconeis species (5). Figs 69–72. Cocconeis pseudomarginata, RVs (Figs 69, 72) and SVs (Figs 70, 71) (Figs 69 and 70, a complete valve). Figs 73–76. C. pseudomarginata var. intermedia, RVs (73, 76) and SVs (Figs 74, 75). Scale bar = 10 μm (Figs 69–76).

FIGURES 84–87 in Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea

FIGURES 84–87. LM micrographs of Cocconeis species (7). Figs 84–86. Cocconeis pellucida, SVs (Figs 84, 85) and RVs (Figs 85, 86), internal view (Fig. 84) and external view of SV (Fig. 86). Fig. 87. C. conspicua, SV. Scale bars = 10 μm (Figs 84–87).