Massalongia griseolobulata is a species of lichen in the family Massalongiaceae. Found in the Tristan da CunhaâÂÂGough Island, it was described as a new species in 2010 by Norwegian lichenologist Dag ÃÂvstedal. The type specimen was collected from the lower slopes of Tafelkop on Gough Island). Here it was found growing on the trunk of a treefern (Lomariocycas palmiformis) at an altitude of . The species is known only from the type locality.
The lichen has a pale grey to ochre, squamulose (scaley) thallus covering an area of . Its ascospores, which number eight per ascus, are 6âÂÂ7-septate and measure 25âÂÂ30 by 7âÂÂ11 üm. No secondary chemicals were detected using thin-layer chromatography.