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6 results for “Poulinea”
FIGURES 26–31 in Chelonicola and Poulinea, two new gomphonemoid diatom genera (Bacillariophyta) living on marine turtles from Costa Rica
FIGURES 26–31. Poulinea lepidochelicola. SEM pictures taken from the holotype population from the olive ridley sea turtle carapace collected on Ostional Beach, Costa Rica. 26. External oblique view of an entire valve showing the shape of the mantle. 27. Internal view of two entire valves without girdle elements showing the raphe sternum and the covered areolae. 28. Internal detail of the headpole showing the helictoglossae and a few areolae surrounding the headpole. 29. Internal detail of the footpole with the helictoglossae and several rows of areolae surrounding the footpole. 30. Internal detail of the central area with the siliceous covering of the proximal raphe endings. 31. Internal detail of the central area. The siliceous flap covering the proximal raphe endings has been removed showing the raphe endings. Scale bar represents 1 μm except for Fig. 27 where scale bar = 5 μm.
FIGURES 21–25 in Chelonicola and Poulinea, two new gomphonemoid diatom genera (Bacillariophyta) living on marine turtles from Costa Rica
FIGURES 21–25. Poulinea lepidochelicola. SEM pictures taken from the holotype population from the olive ridley sea turtle carapace collected on Ostional Beach, Costa Rica. 21. External view of an entire valve showing the raphe structure, the striae composed of two enlarged areolae and the fascia with only one reduced stria. 22. External detail of a headpole with the siliceous covering of the distal raphe fissure and the lack of an apical pore field. 23. External detail of a footpole with the thickened siliceous covering of the distal raphe fissure and the presence of several areolae surrounding the apex. 24. External detail of the central area showing the spatulate proximal raphe endings. 25. External detail of the striae. Note the hymenate coverings in the areolae canals. Scale bar represents 1 μm except for Fig. 21 where scale bar = 10 μm.
FIGURES 13–20 in Chelonicola and Poulinea, two new gomphonemoid diatom genera (Bacillariophyta) living on marine turtles from Costa Rica
FIGURES 13–20. Poulinea lepidochelicola. SEM pictures taken from the holotype population from the olive ridley sea turtle carapace collected on Ostional Beach, Costa Rica. 13. Several frustules attached to the substrate showing how the population is organised. 14. Five frustules attached to the substrate showing the headpoles and the girdle bands. 15. External girdle view of an entire frustule showing the girdle bands and the mantle. 16. External girdle view of an entire valve showing the mantle, the distal raphe fissures and the doubling of the perforation of the girdle bands near the footpole. 17. External detail of the footpole. The arrow shows the doubling of the poroids. 18. External detail of the headpole. 19. Internal view of an entire valve showing the raphe sternum, the septate girdle bands and the covered areolae. 20. Second copula with the typical septum at the footpole. Scale bar represents 10 μm, except for Figs 17, 18 where scale bar = 1 μm.
FIGURES 7–12 in Chelonicola and Poulinea, two new gomphonemoid diatom genera (Bacillariophyta) living on marine turtles from Costa Rica
FIGURES 7–12. Chelonicola costaricensis. SEM pictures taken from the holotype population from the olive ridley sea turtle carapace collected on Ostional Beach, Costa Rica. 7. External valve face view showing the mantle and the areolae. 8. External detail of a footpole showing the absence of an apical pore field and the distal raphe fissure continuing onto the mantle. 9 & 10. Internal views of an entire valve showing the raphe sternum, the septate girdle bands and the covered areolae. 11. Internal detail of the central area. 12. Internal detail of the footpole with helictoglossa. Scale bar represents 1 μm.
FIGURES 1–6 in Chelonicola and Poulinea, two new gomphonemoid diatom genera (Bacillariophyta) living on marine turtles from Costa Rica
FIGURES 1–6. Chelonicola costaricensis. SEM pictures taken from the holotype population from the olive ridley sea turtle carapace collected on Ostional Beach, Costa Rica. 1. Three frustules of Chelonicola attached to the substrate together with one frustule (upper one) of Poulinea. 2. Several valves of Chelonicola attached to the substrate showing their valve face and the girdle composition. 3. One frustule attached to the substrate by a mucilaginous stalk. The girdle structure composed of at least 10 bands is shown. 4. Valve face view showing the head pole with the distal raphe fissure continuing onto the mantle. 5. External detail of the central area showing the lack of fascia and the stria structure. 6. External detail of a head pole showing the distal raphe fissure. Scale bar represents 10 μm except for Figs 5, 6 where scale bar = 1 μm.
FIGURE 32 in Chelonicola and Poulinea, two new gomphonemoid diatom genera (Bacillariophyta) living on marine turtles from Costa Rica
FIGURE 32. Strict consensus tree of four most parsimonious cladograms.
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