为什么口器是附肢演化来的? ■解剖形态学证据 a)典型的昆虫口器( hewing Mouth与结合 纲、唇足纲头部附肢结构最相似; b)典型的昆虫口器几乎发生于所有原始的 昆虫目中,如直翅目蝗虫等类群;其他 类型的口器均由咀嚼式口器衍化而来
Mouthparts口器 Formed from appendages of head segments a Forms or Styles of feeding apparatus 由 brm上唇, mandibles( paired)上颚, maxillae( paired)下颚 lbim下唇,and 舌 五部分组成
Mouthparts 口器
antenna labrum chewing- solid food compound ey 1Sucking-fluid food audible piercing and sucking maxilla 刺吸式 maxilla oning虹吸式 palps Sponging舔吸式 labium( Rasping-sucking 锉 吸式 Grasping -sucking 捕吸式 labium b 2001 Brooks/Cole
Labrum -1 Upper lip Ocelli Labium -1 Maxilla Lower lip Labium Mandible brum Molar area Mandibles -2 Jaws Labrum Maxilla -2 Cardo 2nd Jaws Stipes Mentum Hypopharynx Hypopharynx Lacinia Tongue like Paraglossa ABIUM AXILLA
Mouth parts Labium Labrum –1 Upper lip Labium – 1 Lower lip Mandibles – 2 Jaws Maxilla – 2 2nd Jaws Hypopharynx – 1 Tongue like
咀嚼式口器 Chewing mouthparts 由五部分组成: )上唇1 abru epipharynx 头节1的附肢,内侧有内唇。 Compound e Mandible Labrum Lab ium Maxime Labial palp