Pichincha Filmy Fern (Hymenophyllum tenerum)
This species was described in 1861, it apparently is known only from the type material that was collected at an unknown locality in the Pichincha Province of Ecuador.
The species is considered possibly extinct.
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edited: 03.11.2020
Dead as the Dodo – Holocene Extinctions
… about 5858 taxa have disappeared since the beginning of the Anthropocene era (since about 10000 BCE)
