Complex sentence: It was placed initially in the family Tineidae of superfamily Tineoidea, but it appears to belong to the related Gelechoidea, and therein to subfamily Oecophorinae of the family Oecophoridae.
Split into simpler sentences: It was placed initially in the family Tineidae of superfamily Tineoidea. But actually, it appears to belong to the related Gelechoidea, and therein to subfamily Oecophorinae of the family Oecophoridae.