This recently described species is endemic to Brazil. The few collections available are all from the mountains of Bahia and Espírito Santo, between 750 and 950 m above sea level. Asplenium truncorum grows exclusively as a low-trunk epiphyte on the root mantle of tree ferns, particularly Alsophila setosa Kaulf. (Cyatheaceae).
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- A. truncorum – habitat
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- A. truncorum – habit
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- A. truncorum – leaves
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- A. truncorum – sori
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- A. truncorum – lamina indument
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- A. truncorum – rhizome scales
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- A. truncorum – SEM spore
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- A. truncorum – SEM spores
