This lichen species is characterized by its dark brown to grey-brown thallus, which forms irregular patches over soil or bryophytes, and consists of granules that coalesce to create convex to bullate squamules.

The type specimen for this species was found in Tasmania, specifically in the Legges Tor region, on skeletal soil or directly on flat rock surfaces in an alpine boulder field.

[2] In the alpine regions of Tasmania where Schaereria bullata thrives, several other lichen species share a similar habitat.

Here are some of the similar species found in these high-altitude environments: Cetraria australiensis: This lichen, commonly known as the "Australian Parmelia", often co-occurs with S. bullata.

While it can resemble S. bullata at first glance, especially when the latter is not displaying its characteristic bullate squamules, a closer examination reveals the differences.

[2] Schaereria bullata is primarily found in the alpine regions of Tasmania, with a few occurrences in the West Coast Range.

It prefers horizontal rock plates with temporary moisture accumulation, where a thin layer of soil develops.