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Figure 7 | Journal of Biological Research-Thessaloniki

Figure 7

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

Figure 7

LM and SEM images of Paralia guyana ‘capebreton’ valves. (A,B) GP1. Light micrographs. (A) Valve face view of separation valve. (B) A chain of live cells. (C-J) Scanning electron micrographs. Isotype specimens of P. guyana B40 0040795. (C-E) Valve face. (C) GP1. Intercalary valve. (D) GP6. Separation valve with marginal prickles (arrow). (E) GP2. Separation valve with minute prickles throughout valve face (arrow). (F) GP1. Interlocked sibling intercalary valves; fenestrae covered. (G) GP6. Tilted valve face view of intercalary valve with capitate marginal spines (arrow); fenestrae uncovered. (H) GP6. Mantle view of separation valve with prickles (arrow) and slits in copulae (arrowhead). (I) GP4. Portion of mantle of incompletely silicified intercalary valve with marginal spines (arrow), pores of basal silica layer (arrowhead) and exposed fenestrae. (J) GP5. Internal view of valve showing positions of rimoportulae (arrows). Scale bars = 5 μm (A-E,G,J), 2 μm (F,H), 1 μm (I).

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