Reproducetive Biology And Cytologenetics In Panorpidae (Mecoptera)

The study is mainly about the reproductive biology and cytologenetics in the male of Mecoptera insect. The structure of male reproductive system and chromosome behavior during mitosis and meiosis were described completely and accurately. The main results are as follows: The male 6-8th abdominal segments were morphologically compared in Mecoptera. They can be divided into three types according to the elongatedness in 7-8th abdominal segments and whether their basal parts reduced or not. As follow: ①7-8th are elongated, and basal process reduced, including Panorpa liui Hua et Chou, Panorpa jilinensis Zhou; ②7-8th are not elongated, but basal process reduced, most of sample belong to this, including Panorpa jilinensis Zhou,Panorpa magna Chou and so on;③7-8th are not elongated and not reduced in basal process, only one species belong to this kind, Panorpa longihypovalva, As 7-8th was not elongated and this mode was the antiquity one. There were great differences in male reproductive system in Panorpidae, so we question in divided the criterion of Panorpa and Neopanorpa. Genus Panorpa can be divided into three groups, ①Longihypovalva–group, including Panorpa longihypovalva ,Testes and epididymis are independence each other and 7-8th abdomens segment were not elongated; ②Liui-group, including Panorpa liui Hua et Chou and Panorpa jilinensis Zhou, elongated abdomens segment and envelop in testes and epididymis in same membrane; ③Emarginata-group, including Panorpa changbaishana and Panorpa magna Chou etc. They all have a reduced basal process. Neopanorpa lui Chou et Ran and Neopanorpa longiprocessa Hua et Chou are great different in male reproductive system and N. lui Chou et Ran are more like Genus Panorpa than N. longiprocessa Hua et Chou. Some species in Panorpidae, testes have a special structure as some species (Panorpa magna Chou, Panorpa chengi Chou, Panorpa longihypovalva , Panorpa sexspinosa Cheng, Panorpa emarginata Cheng , and Panorpa nanwutaina Chou) have some tiny tube encircle in testes. The accessory glands of seminal vesicles may have some function in copulation in Scorpion flies. In this paper are record karyotypes of four species in Panorpa, and morphology of sperm in three species in Panorpa. During the study, Panorpa statura Cheng, 1949 is found to be a new synonym of Panorpa tincta Navas, 1931.