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1 |
open, with a long bridge |
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2 |
open, with a short bridge or bridge almost lacking |
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3 |
closed by a simple septum, with a long bridge |
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4 |
closed by a simple septum, with a short bridge or bridge almost lacking (contact-septum) |
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5 |
closed by a clamp, with a long bridge |
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6 |
closed by a clamp, with a short bridge or bridge almost lacking (contact-clamp) |
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