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FIGURE 1 Bioerosion in fossil reefs. (A) Monotaxic bioerosion of Trypanites in a stromatoporoid
skeleton, off-reef facies, Late Silurian, Gotland, Sweden. Width of image is 20 cm. (B) Trypanites in
early cemented fill within archaeocyath sponge, Early Cambrian, Labrador. Width of image is 1 cm.
(C) Three elongate Petroxestes pera and several circular Trypanites apertures in a stromatoporoid,
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