Catillaria glaucogrisea is a species of saxicolous (rock-dwelling), crustose lichen in the family Catillariaceae.

[1] Found on Campbell Islands, where it grows on limestone, it was formally described as new to science in 2004 by the lichenologist Alan Fryday.

The lichen has a pale grey areolate thallus up to 0.15 mm thick, with deep cracks separating the areoles.

Its apothecia (fruiting bodies) are black, and it makes ascospores measuring 4–6 μm wide.

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