Abdomen The structure of the first abdominal segment serves to separate the two principal suborders of the Coleoptera. in the Adephaga the hind coxae extend backward and bisect the first abdominal sternum In the Polyphaga the hind coxae extend backward a different distance in different groups,but the first abdominal sternum is never completely divided,and its posterior edge extends completely across the body
Abdomen ❖ The structure of the first abdominal segment serves to separate the two principal suborders of the Coleoptera. in the Adephaga the hind coxae extend backward and bisect the first abdominal sternum In the Polyphaga the hind coxae extend backward a different distance in different groups, but the first abdominal sternum is never completely divided, and its posterior edge extends completely across the body
2 suborders of Coleoptera: Ist abdominal poserior maron segment dividec 0f1s攻%0n by hind coxae 色s6 omdletely acroet shdomen Adephaga: Cicindelidae .Carabidae Polyphaga: ·Dytiscidae ·everything else .Gyrinidae
Biology Metamorphosis is complete (egg-larva-pupa- adult) The life cycle in this order varies in length from four generations a year to one generation in several years;most species have one generation a year. The winter may be passed in any of the life stages,depending on the species. Many overwinter as partly grown larvae. Many overwinter as pupae in chambers in the soil or in wood or in other protected situations Many overwinter as adults Relatively few species overwinter as eggs
Biology ❖Metamorphosis is complete (egg-larva-pupaadult) ❖The life cycle in this order varies in length from four generations a year to one generation in several years; most species have one generation a year. ❖The winter may be passed in any of the life stages, depending on the species. Many overwinter as partly grown larvae, Many overwinter as pupae in chambers in the soil or in wood or in other protected situations Many overwinter as adults Relatively few species overwinter as eggs
Types of Coleoptera larvae ÷A.campodeiform(肉食甲型) (Carabidae步甲科)active,predatory 冬B.eruciform伪躅型 (Chrysomelidae叶甲科) C.scarabaeiform蛴螬型 chafer (Scarabaeidae金龟甲科) ÷D.eruciform and apodous象虫型 (Curculionidae象甲科) E.ireworm金针虫型click beetles,root feeder F.Wood borer钻蛀性long hroned beetles
Types of Coleoptera larvae ❖ A.campodeiform(肉食甲型) (Carabidae步甲科 )active,predatory ❖ B. eruciform 伪躅型 (Chrysomelidae叶甲科) ❖ C.scarabaeiform 蛴螬型 chafer (Scarabaeidae金龟甲科) ❖ D.eruciform and apodous 象虫型 (Curculionidae象甲科) E.Wireworm金针虫型 click beetles,root feeder F.Wood borer 钻蛀性 long hroned beetles
