It was first discovered in a biological soil crust from a desert in New Mexico, USA.

[2] Bracteamorpha trainorii consists of solitary cells that are roughly spherical to ovoid, up to 24 μm long.

Old cells may be orange in color due to the presence of carotenoid pigments.

Zoospores have two flagella of slightly unequal length and an inconspicuous stigma.

In sexual reproduction, the gametes are isogamous and are similar in morphology to the zoospores.