Menegazzia subpertusa is a species of foliose lichen found in New Zealand, Australia, and South America.
Menegazzia subpertusa forms small, leafy rosettes that are usually round but can become irregular, measuring up to about 10 cm across. The individual are narrowâÂÂtypically 1âÂÂ2.5 mm wideâÂÂand their upper surface ranges from slightly wrinkled to rather rough. Minute, powder-like reproductive granules called soredia develop across the lobe surface; they are not confined to the species' characteristic perforations but instead appear in separate, shallow patches.
Sexual fruit-bodies (apothecia) are uncommon. When present they are mostly 2âÂÂ4 mm wide (occasionally to 6 mm) and lack the grainy outer film seen in some related species. Each cylindrical ascus contains only two large, colourless ascospores, roughly 48âÂÂ60 üm long and 25âÂÂ30 üm wide. Chemical tests show a complex mixture of lichen productsâÂÂchiefly stictic, constictic, norstictic and menegazziaic acidsâÂÂalong with several minor compounds.