Pyrenula aurantiacorubra is a species of corticolous (bark-dwelling), crustose lichen in the family Pyrenulaceae. Found in Brazil, this species is characterised by its distinctive orange-red thallus. Its ascospores are muriform, meaning they have multiple chambers, and are 3 by 1–2-septate, measuring 9–18 μm by 5–10 μm.