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6 results for “Navicula cryptocephala”
FIGURE 5 in A new species, Navicula lothargeitleri sp. nov., within the Navicula cryptocephala complex (Bacillariophyceae)
FIGURE 5. Reconstruction of the characteristic shapes of both clades based on the geometric morphometric analysis. For each clade, the deformation grids illustrate the discriminating shape trends. For better visibility of discriminating features the deformation grids are depicted with two times magnified bending along the discriminant axis. A. Navicula cryptocephala (clade I "RBG"). B. Navicula lothargeitleri sp. nov. (clade II "Lubnaig").
FIGURE 3 in A new species, Navicula lothargeitleri sp. nov., within the Navicula cryptocephala complex (Bacillariophyceae)
FIGURE 3. Ordination plot illustrating the results of the principal component analysis of the geometric morphometric data (PC1 = 61.1%, PC2 = 28.9 of the total variation). Crosses corresponds to clade I (N. cryptocephala sensu stricto), open squares to clade II (N. lothargeitleri sp. nov.). The lectotype morphospace spanned PC1 and PC2 and is shown by a solid square.
FIGURE 2. Navicula cryptocephala and N in A new species, Navicula lothargeitleri sp. nov., within the Navicula cryptocephala complex (Bacillariophyceae)
FIGURE 2. Navicula cryptocephala and N. lothargeitleri sp. nov., SEM. A–F. Navicula cryptocephala O/71. A. External view. B. Internal view. C. Central part external view. D. Central part internal view. E. Valve end external view. F. Valve end internal view. G–K. Navicula lothargeitleri sp. nov., strain 647K. G. Both valves. H. Central part external view. I. Central part internal view. J. Valve end external view. K. Valve end internal view. Scale bars: 10 μm (A–B, G), 1 μm (C–F, H–K).
FIGURE 1 in A new species, Navicula lothargeitleri sp. nov., within the Navicula cryptocephala complex (Bacillariophyceae)
FIGURE 1. Navicula cryptocephala (clade I "RBG") and N. lothargeitleri sp. nov. (clade II "Lubnaig") in light and fluorescence microscopy. A. N. cryptocephala interphase nucleus in FM after DAPI staining; arrows indicate two peripheral plaques of heterochromatin lying opposite each other. B–E. Navicula cryptocephala strains 460R, 462R. B–D. Small cells (size range prior to sexual reproduction). C–E. Post-initial cells. F–H. Type material, slide BM 18785. F. Lectotype specimen, as shown in Cox (1995, fig. 23). I. Navicula lothargeitleri interphase nucleus structure in FM after DAPI staining, note central mass of heterochromatin with one nucleolus (arrow). J. Navicula lothargeitleri living cell in interphase with two chloroplasts and nucleus. K. Living cell after chloroplast rotation showing barlike pyrenoid (arrow). L. Navicula lothargeitleri cleaned valve from natural population on Loch Lubnaig (slide E3579/1 in Royal Botanic Garden, Edinburgh). M–N. Navicula lothargeitleri strains O/26, 647K respectively. O–P. Strain 27L. O. Navicula lothargeitleri, holotype. P. Post-initial cell. Scale bar: 10 μm.
FIGURE 4 in A new species, Navicula lothargeitleri sp. nov., within the Navicula cryptocephala complex (Bacillariophyceae)
FIGURE 4. Linear discriminant analysis of valve shape coordinates with their clade affiliation (Hottelling T2 = 320.1, p <10-5). The grey group corresponds to N. cryptocephala sensu stricto and the black group to N. lothargeitleri sp. nov. The leave-out classification analysis correctly assigned 85.3% of the objects to their original groups; the leave-out classification analysis of the lectotype: score on a discriminant axis = 56.7, i.e. strongly clade I (N. cryptocephala).
FIGURE 87–96. Navicula cryptocephala strain LCR-S in Small diatoms (Bacillariophyta) in cultures from the Styx River, New Zealand, including descriptions of three new species
FIGURE 87–96. Navicula cryptocephala strain LCR-S:32:1, CHR618415. Scales: Fig. 87, 10 µm (use for Figs 87, 88); Fig. 89, 5 µm (use for Figs 89–93); all others 1 µm. Figs 87, 88. Live cells viewed by LM, showing paired parietal plastids close against valve margins. Figs 89–93. Cleaned frustules viewed by LM (girdle view in Fig. 93, showing curved valve faces). Figs 94–96. SEM of cleaned frustules. Fig. 94, whole frustule, showing elongated, longitudinally aligned areolae; Fig. 95, widened central area showing central raphe termini; Fig. 96, valve apex showing hooked raphe terminus and pattern of areolae.
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