| 11. | Crustose has learned to adapt to its environment.
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| 12. | The thallus of a crustose lichen has a patchwork or crazy-paving appearance.
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| 13. | The spores of some crustose lichens, however, can develop on these surfaces.
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| 14. | Eventually the crustose spores form small and round thalli and increase in diameter yearly.
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| 15. | Some people who study lichens ( lichenologists ) group squamulose lichens separately from crustose lichens.
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| 16. | These patches of pink " paint " are actually living algae : crustose coralline red algae.
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| 17. | Crustose lichens may also be used for dating rock surfaces, through a technique called lichenometry.
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| 18. | Crustose and squamulose lichens have an upper cortex, but do not have a lower cortex.
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| 19. | "Pertusaria " is a large genus of crustose lichens in the family Pertusariaceae.
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| 20. | In this article, we include wolf lichens as a subsection of crustose lichens growing on wood.
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