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Fig 1: Dinophysis sacculus Schematic diagram (ventral view)from Stein 1883.
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Cell broadest rougly in the middle, posteriorly ending in a blunt antapex, length 56-70 microns.
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Grove, O, Galicia, Spain
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Plate 11. Dinophysis acuminata. Figs. 1-5. SEM: lateral view. Fig. 1. Cell oval and rotund; thecal surface with shallow depressions and scattered pores. Left sulcal list (LSL) extends beyond midpoint of cell. Well-developed cingular lists: anterior cingular list (ACL); posterior cingular list (PCL). C=cingulum. Fig. 2. Long and narrow cell with prominent surface areolae, each with a pore. Antapex tapered and ventrally off-center. Small posterior protrusion present (arrow). Fig. 3. Long and narrow cell. Thecal surface smooth with small scattered pores. Megacytic zone (M) void of pores. Posterior protrusions on antapex (arrow). Figs. 4-5. LM: lateral view. Fig. 4. Surface areolae and tapered antapex (from Larsen & Moestrup 1992: fig. 1d). Fig. 5. Large dorsal nucleus (N). Small, blunt projections on tapered antapex (arrow). Fig. 6. Line drawing.
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Fig 1: Dinophysis caudata Schematic drawing of a cell in lateral view
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Grove, O, Galicia, Spain
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Fig 2: Dinophysis caudata Image of a live cell in lateral view
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Grove, O, Galicia, Spain
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Plate 12. Dinophysis acuta. Fig. 1. SEM: lateral view. Cell oblong and robust; theca heavily areolated. Well developed cingular lists (CL) and left sulcal list (LSL). Pointed antapex. Figs. 2-3. LM: lateral view (from Larsen & Moestrup 1992: fig.s 2a,d; scale bars=20 _). Fig. 2. Large areolae, each with a pore (arrows). Fig. 3. Widest point below mid-section (dashed line) aligned with third sulcal rib (arrow). Fig. 4. Line drawing.
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Fig 3: Dinophysis caudata Image of a Formalin preserved cell in lateral view
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Grove, O, Galicia, Spain
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Arctic Dinophysis norvegica (empty!)from the Chukchi Sea in summer 2011.
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Fig 4: Dinophysis caudata Image of a Lugol's preserved cell in lateral view
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Grove, O, Galicia, Spain
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Plate 13. Dinophysis caudata. Figs. 1-2. SEM. Fig. 1. Large, long and distinctive cell with extended ventral hypothecal process. Cingulum narrow; lists supported by ribs (arrowhead). Strong left sulcal list (double arrows). Right sulcal list present (single arrow). Fig. 2. Ventral view: cell compressed laterally. Figs. 3-4. LM. Fig. 3. Large posterior nucleus (n). Fig. 4. Left sulcal list with three supporting ribs (arrowheads); posterior projection with small knob-like spines (arrows). Surface areolae evident. Fig. 5. SEM. Paired cells joined at dorsal expansion (arrow). Fig. 6. Line drawing.
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Fig 6: Dinophysis caudata Image of a pair of Lugol's preserved cells in lateral view cells in lateral view
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Dinophysis from the SW Pacific (Biosope Cruise)
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Fig 7: SEM of Dinophysis caudata
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Plate 14. Dinophysis fortii. Fig. 1. SEM: lateral view. Left sulcul list (LSL) long and well-developed. Right sulcal list (RSL) present. Cingulum (C) obscures low and small epitheca. Thecal surface covered with areolae. Figs. 2-3. LM: lateral view. Fig. 2. Cell subovate with a wide round posterior bottom (dorsal bulge)(arrows). Fig. 3. LSL supported by three strong ribs (arrows). Smoothly convex dorsal margin. Fig. 4. Line drawing.
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Fig 1: Dinophysis tripos Schematic diagram redrawn from Tomas et al. 1997.
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Fig 1: Dinophysis acuta Schematic drawing of a cell in lateral view
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Plate 15. Dinophysis mitra. Figs. 1-4. SEM. Fig. 1. Lateral view: cell broad and wedge-shaped; epitheca visible. Left sulcal list (LSL) short (arrow). Right sulcal list (RSL) small (arrowhead). Theca heavily areolated. Fig. 2. Epitheca cap-like; greatly reduced. LSL supported by three short ribs (arrows). Ventral hypothecal margin concave below LSL (arrowheads). Fig. 3. Dorsal view: hypothecal margin smoothly convex. Short anterior cingular list (ACL) and posterior cingular list (PCL) supported by numerous ribs. Fig. 4. Ventral view: dividing cell. Megacytic zone expanding (arrows). Epitheca, sulcus, RSL and LSL visible. Fig. 5. LM: large nucleus (n). Fig. 6. Line drawing (Phalacroma mitra).
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Fig 2: Dinophysis acuta Lugol's preserved cell showing shrinkage of cell contents