Clavascidium sinense is a species of squamulose (scaley), ground-dwelling lichen in the family Verrucariaceae.

Found in Northwest China, it was formally described as a new species in 2022 by Tingting Zhang and Xinli Wei.

The type specimen was collected in Datong City (Yanggao County, Shanxi) at an altitude of 1,147 m (3,763 ft).

The species epithet sinense refers to its Chinese distribution.

[1] Characteristics of Clavascidium sinense include the presence of both uniseriate (lined up in a single row) and biseriate (lined up in two rows) ascospores in the asci, pycnidia that are superficial on the surface of the squamules (laminal), and mixed-type medulla (with both rounded and elongated cells).