Amandinea pilbarensis is a little-known species of crustose lichen in the family Physciaceae,[1] First described in 2020, it is found in Australia.

It is similar to Amandinea polyxanthonica, but can be distinguished by its smaller ascospores and the presence of calcium oxalate and thiophanic acid in the medulla.

The type specimen was collected in the Pilbara region of Western Australia, 27 km (17 mi) southwest of the De Grey River, east of Port Hedland, on siliceous rock.

Angular to irregularly shaped individual areoles (small, discrete patches) range from 0.1 to 0.5 mm wide, with the tendency to become weakly radiate (spreading out) at the margin.

[2] Ranging from 0.1 to 0.4 mm wide, the apothecia (fruiting bodies) are lecideine in form (having certain disc and margin characteristics), transitioning from immersed to broadly adnate (attached flatly), sometimes appearing sessile (without a stalk) and constricted at the base, dispersed, rounded.

The thin, persistent proper exciple (outer rim of the apothecium) often has adhering necrotic thalline (lichen body) fragments.