Sclerococcum fissurinae is a species of lichenicolous fungus in the family Dactylosporaceae.

The type specimen was collected in the Hoonah-Angoon Census Area, just outside of Glacier Bay National Park.

[1] The fungus forms black, circular apothecia on its lichen host that are up to 0.6 mm in diameter.

The ascospores are brown with an ellipsoid shape, and typical dimensions of 8–12 by 3–4 μm; they usually have three septa, although sometimes only one or two occur.

A morphologically similar species in the same genus is S. parasiticum but in this fungus, which has a different host, the ascospores are slightly larger (9–15 by 3.5–5 μm).