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Early Eocene plant-fossil assemblages (mostly of dispersed cuticle) from Strahan-Regatta Point, Tasmania, …


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Biology Articles » Paleobiology » Paleobotany » Early eocene dispersed cuticles and mangrove to rainforest vegetation at Strahan-Regatta Point, Tasmania » Figures 1-10

Figures 1-10
- Early eocene dispersed cuticles and mangrove to rainforest vegetation at Strahan-Regatta Point, Tasmania

 

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Figure 1. Locality map.

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Figure 2. Stratigraphic section showing location of samples. Based on Pole (1998a) with the addition of the Cool Store Section, modifications to the Strahan Point Section, and removal of non-fossiliferous samples. Facies correlation between sections indicated by horizontal/diagonal lines.

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Figure 3. Ordination diagrams. 1. Analysis based on all species. Scatter plot of the sites plotted in the first two axis of a Multidimensional Scaling calculated using Bray Curtis dissimilarity. ANOSIM results: R = 0.028, P 0.222; 2. Results for taxa present in at least 20% of the samples (six taxa in 27 samples). Scatter plot of the sites plotted in the first two axis of a Multidimensional Scaling calculated using Bray Curtis dissimilarity. ANOSIM results: R = 0.292, P 0.03.

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Figure 4. Pterostoma sp. and Bowenia sp. 1. Pterostoma hirsurtus. TLM view showing stomata at right, surrounded by prominent ridges of cuticle, and, lower left, a trichome base (SL5381, scale-bar = 50 µm); 2. ?Pterostoma. TLM view showing a single stomatal complex (SB0384, scale-bar = 50 µm); 3. ?Pterostoma. TLM view showing five stomatal complexes (SB0690, scale-bar = 50 µm); 4. ?Pterostoma. TLM detail of a single stomatal complex. Note massively thickened ring around stomatal pore (SB0690, scale-bar = 20 µm); 5. Bowenia. TLM view showing two stomatal complexes. Note differently thickened peristomatal walls of epidermal and subsidiary cells (SL5059, scale-bar = 50 µm); 6. CUT-Z-ACB. TLM detail of a single stomatal complex (SL5335, scale-bar = 20 µm).
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Figure 5. Conifers. 1. Agathis sp. TLM view showing two rows of stomatal complexes (SL5021, scale-bar = 50 µm); 2. Araucaria sp. A. TLM view showing two rows of stomatal complexes (SL5077, scale-bar = 50 µm); 3. Araucaria sp. B. TLM view showing two rows of stomatal complexes (SL4995, scale-bar = 50 µm); 4. Araucarioides sp. TLM view showing a row of stomatal complexes (SL5178, scale-bar = 50 µm); 5. Libocedrus sp. TLM view showing a patch of stomatal complexes. Note networking. Arrow indicates group of calcium oxalate crystals (SL5128, scale-bar = 50 µm); 6. Cupressaceae sp. A. TLM view showing three rows of stomatal complexes. Note common sharing of subsidiary cells between complexes (SL5122, scale-bar = 50 µm); 7. Acmopyle sp. TLM view showing two rows of stomatal complexes. Note distinctive small stomata and broad lateral subsidiary cells with sloping walls (SL5183, scale-bar = 50 µm); 8. Dacrycarpus sp. TLM view showing a single row of chained stomatal complexes (SL5114, scale-bar = 50 µm).

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Figure 6. Conifers. 1. Prumnopitys sp. TLM view showing two overlapping rows of stomatal complexes. Note typical bulging outline of complexes (SL5131, scale-bar = 50 µm); 2. Podocarpaceae sp. A. TLM view showing several crowded rows of stomatal complexes (SL5186, scale-bar = 50 µm); 3. Podocarpaceae sp B. TLM view showing stomatal complexes and rows of small, isodiametric cells (SL5237, scale-bar = 50 µm); 4. Podocarpaceae sp. C. TLM view showing two rows (and one partially obscured) of stomatal complexes. Note narrow subsidiary cells (SL5142, scale-bar = 50 µm); 5. Podocarpaceae sp. E. TLM view showing scattered stomatal complexes. Note prominent buttressing and sinuous walls (SL5020, scale-bar = 50 µm); 6. Podocarpaceae sp. F. TLM view showing two rows of stomatal complexes. Note broad cells flanking complexes (SL5240, scale-bar = 50 µm); 7. Podocarpaceae sp. G. TLM view showing three stomatal complexes (SL5159, scale-bar = 50 µm); 8. Taxaceae? TLM view showing overlapping rows of stomatal complexes and prominent papillae (SL5132, scale-bar = 50 µm).

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Figure 7. Fossil and extant Gnetales. 1. CUT-Z-GDB. TLM view showing five stomatal complexes (SL5298, scale-bar = 50 µm); 2. CUT-Z-GDB. TLM detail of a single stomatal complex. Note the much thinner cuticle over the guard cells (SL5298, scale-bar = 20 µm); 3. Extant Gnetum gnemon (AQ142124, scale-bar = 20 µm); 4. G. microcarpum (AQ142225, scale-bar = 20 µm).

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Figure 8. Winterceae, fossil and extant. 1. CUT-L-DDD. TLM view showing stomatal complexes (SB0756, scale-bar = 50 µm); 2. CUT-L-DDD. TLM view showing two stomatal complexes (SB0756, scale-bar = 20 µm); 3. SEM view of inner cuticular surface showing single stomatal complex. Note very granular surface of epidermal cells (S-1537, scale bar = 10 µm); 4. SEM view of outer cuticular surface showing two stomatal complexes. Note prominent outer stomatal ledges, but without plugged pores (S-1537, scale-bar = 10 µm); 5. CUT-L-DDD. TLM view showing lid cell complex indicated with an arrow (SB0360, scale-bar = 50 µm); 6. Extant Zygogynum balansae, TLM view showing three stomatal complexes. (AQ391241, scale-bar = 50 µm); 7. Extant Bubbia semecarpoides, TLM view showing lid cell indicated with an arrow (AQ546547, scale-bar = 50 µm); 8. Extant Belliolum burttianum, TLM view showing a group of stomatal complexes. (AQ463392, scale-bar = 50 µm).

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Figure 9. Monocots. 1. CUT-Z-JAI. TLM view showing three stomatal complexes (SB0388, scale-bar = 50 µm); 2. CUT-Z-JAI. TLM detail of two stomatal complexes (SB0388, scale-bar = 20 µm); 3. CUT-Mo-JJG. TLM view showing several stomatal complexes, and (to right of centre) a smooth, thickened trichome insertion scar (SB0744, scale-bar = 50 µm); 4. CUT-Mo-JJG. TLM view showing three stomatal complexes (SB0744, scale-bar = 20 µm); 5. CUT-Mo-JBC. TLM view showing (arrowed) three stomatal complexes (SB0393, scale-bar = 50 µm); 6. CUT-Mo-JBC. TLM detail of a single stomatal complex with (arrowed) flanking ridges of cuticle (SB0393, scale-bar = 20 µm).

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Figure 10. Indeterminate monocot. 1. CUT-Mo-GCE. TLM view showing two stomatal complexes with thickened lateral subsidiary cell walls (SL4999, scale-bar = 50 µm); 2. CUT-Mo-GCE. TLM detail of a single stomatal complex (SL4999, scale-bar = 20 µm); 3. CUT-Mo-GCE. TLM view showing a stomatal complex with thickened lateral and polar subsidiary cell walls (SL5199, scale-bar = 50 µm); 4. CUT-Mo-GCE. TLM detail of a single stomatal complex (SL5062, scale-bar = 20 µm); 5. SEM view of inner cuticular surface showing single stomatal complex. Note thickened walls of lateral subsidiary cells (S-1682, scale-bar = 10 µm); 6. SEM view of outer cuticular surface showing single stomatal complex. Note prominent elliptical outer stomatal ledges (S-1682, scale-bar = 10 µm).

 


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