Dinophysiales

Fig 1: Dinophysis sacculus Schematic diagram (ventral view)from Stein 1883.

Fig 1: Dinophysis caudata Schematic drawing of a cell in lateral view

Fig 2: Dinophysis caudata Image of a live cell in lateral view

Fig 3: Dinophysis caudata Image of a Formalin preserved cell in lateral view

Fig 4: Dinophysis caudata Image of a Lugol's preserved cell in lateral view

Fig 6: Dinophysis caudata Image of a pair of Lugol's preserved cells in lateral view cells in lateral view

Fig 7: SEM of Dinophysis caudata

Fig 1: Dinophysis tripos Schematic diagram redrawn from Tomas et al. 1997.

Specimen from the Ionian Sea found at 75 m depth. Lugol's-fixed.

Fig 1: Dinophysis acuta Schematic drawing of a cell in lateral view

David J.S. Montagnes; David J.S. Montagnes.

Fig 2: Dinophysis acuta Lugol's preserved cell showing shrinkage of cell contents

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.

Fig 3: Dinophysis acuta Live cell in lateral view

Fig 4 Eletron micrograph of a D. acuta cell showing details of pore structure and sulcal lists

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.

Fig 5 Epifluorescence image under blue light

Histioneis hyalina (probably). From Station 52 of the Tara Oceans Expedition

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.

Ornithorcercus heteroporus (probably) from Station 72 of the Tara Oceans Expedition.

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.

He thought it splendid. Figures from the original description of Ornitheroceras splendidus by Franz Schütt in 1893. The paper is available on the Classic Taxonomic Monographs page.

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).