Phylloblastia inexpectata is a species of foliicolous (leaf-dwelling) lichen in the family Verrucariaceae.

Found in Europe, it was formally described by lichenologists Emmanuël Sérusiaux, Brian John Coppins, and Robert Lücking.

The type specimen was collected by the second author in Dunskey Glen Woods (Portpatrick, Scotland), where it was found growing on the leaves of a Prunus laurocerasus tree growing near a stream.

It has also been collected in England, southern Italy, Madeira,[1] and Spain.

The photobiont partner is a green alga that is rounded and measures 5–10 μm in diameter; intermixed with fungal hyphae, they can be aggregated in irregular clumps or plates.