Characteristics of A. leucophila include its hook-shaped spores and the presence of psoromic acid, which causes it to turn yellow-orange in a certain chemical spot test.

Due to its extremely limited known distribution and the threats to its habitat from deforestation and land-use changes, the International Union for Conservation of Nature has classified A. leucophila as a Critically Endangered species.

[3] The species A. psoromica, originally described from Venezuela in 2002,[6] was reduced to synonymy with A. leucophila by Ertz in 2018 due to morphological and chemical similarities.

The species was originally described from a single record in the humid tropical forests of Piedecuesta municipality, Santander Department, Colombia, at an elevation of 1,200 m (3,900 ft).

In Venezuela, it was recorded from the Alto Orinoco Municipality in Amazonas State, about 15 km (9.3 mi) west of La Esmeralda, at a much lower elevation of approximately 110 m (360 ft).

[1][3] The Venezuelan specimen was specifically noted growing on the rough bark of Goupia glabra, a tree species native to northern South America.