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Figs. 21-24. . Prorocentrum ruetzlerianum sp. nov. Fig. 21. The body is ovoid and covered with pentagonal areolae. FIG. 22. The cell is round in side view and convex in the middle of the valve, where each deep depression (areola) has a small circular opening (arrow). Scale bars = 200 µm. FIG.23. Intercalary band is broad, transversely rugose, the sinuous rugae being unique to this species. FIG 24. The periflagellar area is flat, has a triangular orientation set into a shallow, V-shaped depression of the right valve, and composed of platelets of unequal size and shape. Flagellar pore (f), and auxiliary pore (a). The two flagella are not present. Scale bars = 200 µm.
EMu: SEM NEGATIVE # 23012; SEM STUB # 23; FIELD # 78-87; ACCESSION # 407159; CATALOG # 30; Figure # 21.
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Plate 48. Prorocentrum ruetzlerianum. Figs. 1-3. SEM. Fig. 1. Right valve: cell round to ovoid, covered with pentagonal areolae. Cell surface rugose. Fig. 2. Anterio-lateral view. Each areola with small circular pore at its base (arrows). Intercalary band broad, transversely rugose. Fig. 3. Periflagellar area: small, shallow, unornamented depression on right valve; large flagellar (f) pore and smaller auxiliary (a) pore. Figs. 4-5. LM (M.A. Faust). Right valve: striated valve margins (small arrows); large central pyrenoid (large arrow). Fig. 6. Line drawing: areolae arrangement. (Figs. 1-3,6 after Faust 1990b)
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Figs. 2-7. . Prorocentrum sabulosum sp. nov. FIG. 2. Cell is in right lateral view, including the periflagellar area. The valve surface is areolated. Cells are oval in valve view. FIG. 3. Cell is in left lateral view. The anterior end is flat to slightly concave. The cell margin is smooth. FIG. 4. Apical view, cells are ellipsoid, the apical area exhibits a rounded lip, and both left and right valves are excavated. Foreign material is on cell surface. FIG. 5. The periflagellar area, set in a V-shaped depression, is a broad triangle with raised margin. The flagellar pore (F) is larger than the auxiliary pore (A). A large pore is adjacent to the flagellar pore (arrows), and three smaller pores are adjacent to the auxiliary pore (arrowheads). FIG. 6. A narrow apical collar wraps around the flagellar and auxiliary pores (large arrows) viewed from the side. The position of the large pore (small arrows) and small pores (arrowhead) are from the side. FIG.7. Aeolae are round to oval with a smooth margin. Some areolae have oblong-shaped trichocyst pores (arrows).
EMu: SEM NEGATIVE # 23012; SEM STUB # 23; FIELD # 78-87; ACCESSION # 407159; CATALOG # 30; Figure # 21.
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Figs. 8-13. Prorocentrum sculptile sp. nov. FIG.8. Cell shape is broadly ovate with a rounded, indented, anterior area in left valve view. FIG.9. Anterior end on the cell in right valve view is a deep-sculptured indentation. FIG.10. The posterior-lateral view is ellipsoid. The intercalary band is smooth. FIG.11. The valve surface has shallow depressions of variable shapes, round to oblong with smooth margins. Trichocyst pore openings that are round, similar in size, and at times open or closed are situated in some of the depressions (arrows). FIG.12. The periflagellar area on the right valve has a deep, V-shaped, narrow, 7-8-µm-long curved depression and an inclined, thin, apical structure (arrows). The transverse flagellum (arrowheads) is shown. FIG.13. Ejected trichocysts are situated in furrowed depressions on the valve surface (arrows).
EMu: HOLOTYPE SEM NEGATIVE #133051; SEM stub # 133; Field # 556-92; Accession # 407166; Catalog # 92; Figure # 8.
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Figs. 7-12. Prorocentrum tropicalis sp. nov. FIG.7. Cells are broadly oval in valve view. The valve surface is rugose with scattered poroids. The cell margin has a ledge. The anterior end of the left valve is flat to slightly concave. FIG. 8. The right valve of a newly divided cell, the margin is narrow. FIG, 9. Periflagellar area on right valve at the anterior end of a cell; a ridge appears around the cell. The ridge is granular and horizontally striated (arrowheads). FIG. 10. Apical view of a cell. Flagella are not shown. FIG. 11. Periflagellar area is abroad triangle with a raised margin, unornamented. Flagellar pore (F) and auxiliary (A) pore are unequal in size. The valve surface is rugose with evenly distributed poroids; at the center of a poroid, a small round dome is situated. FIG. 12. A flexible, short, tubular, peduncle-like structure (arrow) emerges from the flagellar pore.
EMu: Holotype SEM negative #159090; SEM #133; Field # 556-92; Accession # 407166; Catalog # 1420; Figure # 9.
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Description: Prorocentrum micans Ehr. 1833; Prorocentraceae, Prorocentrales, Dinophyceae, Dinoflagellata (Dinophyta) English: Hydrofront of Dnieper-Bug Liman Русский: Гидрофронт
Днепро-Бугского лимана. Date: 12 December 2007. Source: Own work. Author:
Minami Himemiya.