Abstract
Megalaria hainanensis is described as new to science. It occurs on bryophytes over rock, and is characterized by its large apothecia, light-brown to brown-red proper exciple, an epithecium containing cinereorufa-green, arnoldiana-brown in the hypothecium, ascospores of (22) –24– (25) × (9) –10 µm, and the presence of atranorin and zeorin in the thallus. Megalaria laureri is also reported from mainland China for the first time.