Undulivena thaiensis sp. n. 12 abdominal apodemes 13 genital capsule 14 subgenital plate 15 subgenital plate, style and connective 16 pygofer dorsal appendage (upper part) and an extension of anal tube appendage (lower part), lateral view 17 style 18 connective 19 aedeagus, ventral view (broken line indicates ligament attaching to pygofer dorsal appendage) 20 aedeagus, ventro-lateral view 21 venation of forewing 22 venation of hind wing 23 anal tube appendage with an apex extension and pygofer dorsal appendage, dorsal view.