Ventral tubular ducts of Saissetia kunmingensis Cao & Feng, sp. nov. A type I, type II and type III VTDs present submarginally on posterior abdominal segments B type II VTD present submarginally on posterior abdominal segments C type II VTD present mediolaterally on posterior abdominal segments D type I and type II VTDs present submarginally around body E type I and type II VTDs present submarginally around body F type I VTDs present mediolaterally on posterior abdominal segments.