Tomnashia luteominia, the red firedot lichen, is a species of saxicolous (rock-dwelling), crustose lichen in the family Teloschistaceae.

[2] It is widely distributed along the North American west coast.

bolanderi has distinctive red apothecia (fruiting bodies), while var.

[3] The lichen was first formally described as a new species in 1866 by the American lichenologist Edward Tuckerman, as Placodium luteominimum.

[4] Sergey Kondratyuk and Jae-Seoun Hur transferred it to the genus Tomnashia in 2017.