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Figure 1 | Journal of Biological Research-Thessaloniki

Figure 1

From: Paralia (Bacillariophyta) stowaways in ship ballast: implications for biogeography and diversity of the genus

Figure 1

SEM images illustrating the frustule characters examined and quantified in this study. (A) intercalary valve face. 1 = diameter; 2 = internal linking spines (so named because they are located internally relative to the marginal linking spines) in the form of baculiform elevations in intercalary valves and as noduliform protrusions in separation valves; 3 = external ring of marginal pores; 4 = internal ring of marginal pores. (B) separation valve face. (C) Tilted view of separation valve. 5 = slits in copula; 6 = valve face prickles. (D) mantle. 7 = four fenestrae; 8 = six marginal linking spines. (E) Internal view of valve. 9 = rimoportulae; 10 = three internal striae; 11 = three internal striae pore areolae. (A) Paralia guyana ‘servidei’, (B,E) P. guyana ‘smooth’ and (C,D) P. guyana ‘capebreton’ genodemes. Scale bars = 5 μm (A-D), 1 μm (E).

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