Abstract
It is confirmed that there are following two types of the germ rudiment formation in the integripalpian Trichoptera. Glyphotaelius admorsus belongs to the type which the amniotic fold develops only from the posterior margin of germ disk, and Neosererina crassicornis belongs to another type which the folds develop from all around the margin. The Glyphotaelius type is similar to those of the annulipalpian Trichoptera, and zeugropteran and monotrysian moths in the state of the germ rudiment formation. The Neosererina type rather resembles those of the ditrysian Lepidoptera in the state. The results of the present study suggest that there is an akin relationship between the Trichoptera and Lepidoptera.
