Figure F4. A, B. Fascichnus dactylus (SEM images of resin casts of boreholes) colonies produced by the cyanobacterium Hyella caespitosa and related species. Typical thick and short galleries of F. dactylus with indicated cell walls. F. dactylus is recorded solely in coral skeletons from Tahiti deglacial coral reefs (SEM).
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