Noun
monotrysian (plural monotrysians)
Any moth of the taxon Monotrysia
Niels P. Kristensen, E. S. Nielsen and D. R. Davis studied the relationships among monotrysian families and Kristensen worked more generally on insect phylogeny and higher Lepidoptera too. Source: Internet
In the monotrysian type is an opening on the fused segments of the sterna 9 and 10, which act as insemination and oviposition. Source: Internet