Transtillaspis cosangana is a species of moth of the family Tortricidae. It is found in Napo Province, Ecuador.

The wingspan is about 17.5 mm.

Etymology The species name refers to Cosanga, the type locality., 2009: Tortricidae (Lepidoptera) from the mountains of Ecuador and remarks on their geographical distribution. Part IV. Eastern Cordillera. Acta Zoologica Cracoviensia 51B (1-2): 119-187. doi:10.3409/azc.52b_1-2.119-187. Full article: .

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