The type specimen was found by the first author in Khao Yai National Park, (Nakhon Ratchasima province) at an altitude of 800 m (2,600 ft).

Its ascospores are ellipsoid, hyaline, and have dimensions of 20–23 by 10–14 μm; they are muriform (divided into multiple smaller compartments), with 3–5 transverse septa and 0–1 longitudinal septum per segment.

The campylidia are sessile, hood-shaped, dark grey with a white-grey base, and contain short, curved conidia that are 45–50 by 2–2.5 μm in size.

[2] Tapellaria parvimuriformis has only been found in Khao Yai National Park, Thailand, where it grows on leaf surfaces in the shady understory of lowland rainforests near rivers.

Two Tapellaria species, T. nigrata and T. parvimuriformis, are found in Khao Yai National Park, with the former being more common and displaying different ascospore and apothecia characteristics.