《普通昆虫学》课程教学资源（PPT课件讲稿）第四章 昆虫的腹部 Insect Abdomen

Chapter 4. Insect Abdomen 第四章昆虫的腹部 1234567890 11

Function Houses visceral organs gestion, excretion, reproduction t1t2t3 tilts, ttg tio----ppt ■ Structure Genitalia-mating ovp stn spr Ovipositor ■ Cercus(1l t tergum ovp=ovIpositor sensory stn=sternum ept = epiproct spr=spiracle cr = cercus(cerci) ppt= paraproct

t = tergum ovp = ovipositor stn = sternum ept = epiproct spr = spiracle cr = cercus (cerci) ppt = paraproct

The number of abdominal segments Primitively, abdomen is 11-segmented and the terminal segments are usually modified and/or diminished.原始昆虫腹部一般12节(11腹节+ 尾节) Most insects have 9 or 10 abdominal segments, but several of these are reduced

第一节腹部的基本构造 general structure ■腹部一般由背板、腹板 和侧膜组成 腹部为什么没有侧板? regental segments genital segments postgenital segments

、生殖节 genital segments The genital opening(gonopore) is located on or behind the &th or oth sternum in female and behind the th sternum in the male ■雌性第8、9腹节,雄性第9腹节发生生殖 孔,称为生殖节 genital segments

、生殖前节 pregenital segments (脏节 visceral segments) 生殖前节 pregenital segments,包 含大量内脏,故又称作脏节 visceral segments o

Modification特化 Propodeum: In the higher hymenoptera the first abdominal segment s fused with the metathorax Physogastric abdomens of Isoptera queens females abdomen enormously swollen 26

、生殖后节 postgenital segments include the 10th and 1 th abdominal segment 生殖后节 postgenital segments(10-11节)通 常发生退化。 第11节又称臀节或肛节;背板位于肛门上,故称作肛 上板 epiproct,侧板称作肛侧板 paraprocts;附肢衍化为 尾须cri(位于第10和11节的节间膜上,可活动

第二节腹部的附肢 Abdominal appendages 外生殖器 xternal genitalia 是昆虫用以交尾和产卵的器官,由附肢特化而成(与附 肢是同源器官 3 Ovipositor. used for placing eggs in specific sites The appendages of the male are used as clasping organs luring copulation,雄性的外生殖器称交配器 copulatory organs

1、雌性外生殖器 Female genitalia 产卵器 ovipositor 生感、孔 背产卵瓣 第一片 由生殖肢nopo特化而成, 内产卵瓣 又叫生殖突 apophyse 中轴师管1 一载潮片“較瓣片 第二载瓣片 肢基片 雌性生殖突衍化成为产卵瓣 内产卵瓣 背产卵瓣 内产卵瓣 valvulae ■生殖突基节(肢基节)衍化 生殖孔 发展成为负瓣片 velifer