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6 results for “Trigonaspis”
Figs 17–23. Trigonaspis melvillea. TEM whole mounts from the Weddell Sea, Antarctica. 17 in Coccolithophorids in Polar Waters: Trigonaspis spp. Revisited
Figs 17–23. Trigonaspis melvillea. TEM whole mounts from the Weddell Sea, Antarctica. 17 – whole cell with flagella and a curled up haptonema positioned inside a corona of distinct flagellar pole coccoliths; 18 – complete cell with flagella and partly extended haptonema; 19 – detail of the distal termination of a flagellar pole coccolith (from Fig. 18); 20 – rimmed body coccoliths supporting densely packed layers of crystallite groups (from Fig. 18). Unmineralized under layer scales are pointed out; 21 – detail of unmineralized termination of flagellar pole coccolith. The still remaining organic matrix clearly reveals the triangular shape of a crystallite group; 22 – detail of body coccolith calcification. Notice that the triangles are united to form hexagonal rings; 23 – uncalcified specimen showing body coccolith base plates and under layer scales (arrows).
Figs 3–8 in Coccolithophorids in Polar Waters: Trigonaspis spp. Revisited
Figs 3–8. Trigonaspis diskoensis. TEM whole mounts from NE Greenland (NEW). 3 – whole cell with flagella and a curled up haptonema. Tower-shaped large coccoliths encircle the flagellar pole; 4 – body coccoliths (detail from Fig. 3) with triangular crystallites arranged in a single layer on top of the visibly rimmed organic base plate. Unmineralized under layer scales are pointed out; 5 – complete cell display- ing a range of coccolith shapes, viz. tower-shaped (t), hat-shaped (h) and flat discs (d); 6 – complete cell with appendages and a distinct tuft of tower-shaped flagellar pole coccoliths; 7 – high magnification of flat body coccoliths from the cell shown in Fig. 6; 8 – detail of flagellar pole coccolith from the cell shown in Fig. 3.
Figs 24–26 in Coccolithophorids in Polar Waters: Trigonaspis spp. Revisited
Figs 24–26. Trigonaspis sp. (= Pappomonas garrisonii HOL?). TEM whole mounts from the Weddell Sea, Antarctica. 24 – whole cell with curled up flagella and haptonema. Tower-shaped but differently sized coccoliths occur over the entire surface of the cell; 25 – detail (from Fig. 24) of tower-shaped coccoliths showing the triangular crystallite groups. Arrow points to a body coccolith; 26 – part of body coccolith calcification. Reversed printing.
Figs 12–16 in Coccolithophorids in Polar Waters: Trigonaspis spp. Revisited
Figs 12–16. Trigonaspis minutissima. TEM whole mounts from West Greenland (Arctic Station). 12 – whole cell with partly detached coccoliths; 13 – detail from Fig. 12 of flagellar pole coccoliths showing triangular crystallite groups and slender towers wreathed with 4–5 of these in a random transect; 14 – detail of body coccolith from the cell shown in Fig. 12; 15 – detail of coccoliths from the cell shown in Fig. 16; 16 – whole cell with flagella and curled up haptonema.
Figs 9–11 in Coccolithophorids in Polar Waters: Trigonaspis spp. Revisited
Figs 9–11. Trigonaspis diskoensis. TEM whole mounts from NE Greenland (NEW) (Fig. 9), and West Greenland (Arctic Station) (Figs 10–11). 9 – high magnification of tower-shaped flagellar pole coccoliths (from Fig. 5) showing the helical placement of triangular crystallite groups; 10 – high magnification of hat-shaped coccolith detached from the cell shown in Fig. 11. Notice that the triangular crystallites are arranged in highly organized tiers; 11 – Whole cell with extended flagella and haptonema.
Figs 1–2. Collection sites. 1 in Coccolithophorids in Polar Waters: Trigonaspis spp. Revisited
Figs 1–2. Collection sites. 1 – map of the Arctic (Greenland) indi- cating sampling sites; 2 – map of the Antarctic (Weddell Sea) showing the location of sampling sites.
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