Taxa described in 1808

Gyalecta is a genus of lichen-forming fungi in the family Gyalectaceae that contains 50 species. Gyalecta was circumscribed by lichenologist Erik Acharius in 1808. It forms associations with Trentepohlia algae.

Culcitium is a genus of flowering plants belonging to the family Asteraceae.

Solorina is a genus of 10 species of lichenized fungi in the family Peltigeraceae. The genus was first described by the Swedish botanist Erik Acharius in 1808. Members of the genus are commonly called socket lichens.

Acolium is a genus of lichenized fungi in the family Caliciaceae. The genus has a widespread distribution and contains six species. These lichens are found on bark and wood, occasionally on rocks, or growing on other lichens.