Blastobasis is the type genus of the gelechioid moth family Blastobasidae; in some arrangements these are placed in the case-bearer family (Coleophoridae) as a subfamily. Within the Blastobasidae, the subfamily Blastobasinae (or tribe Blastobasini, if united with the concealer moths) has been established to distinguish the Blastobasis lineage from the group around Holcocera, but the delimitation is not yet well-resolved.