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INSECT THORAX. Insect Thorax - 3 segmented ProthoraxMesothoraxMetathorax Pterothorax Anterior Posterior.

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Presentation on theme: "INSECT THORAX. Insect Thorax - 3 segmented ProthoraxMesothoraxMetathorax Pterothorax Anterior Posterior."— Presentation transcript:

1 INSECT THORAX

2 Insect Thorax - 3 segmented ProthoraxMesothoraxMetathorax Pterothorax Anterior Posterior

3 pleuron notum sternum pleuron Cross section of insect thorax

4 pleuron notum sternum Insect Thorax scutum scutellum epimeron basisternum trochantin sternellum tergum episternum

5 pleuron notum sternum Insect Thorax

6 Internal support in thorax pleural ridge pleural apophysis sternal apophysis sternopleural muscle furca Furca Pleural/sternal apophysis Apodemes

7 Thoracic Appendages - Legs coxa trochanter femur tibia tarsus pretarsus tarsomeres coxa

8 Insect Leg - Articulation monocondylic leg

9 Insect Leg - Articulation monocondylic trochantin leg

10 Insect Leg - Articulation monocondylic Decreasing mobility Increasing strength trochantin dicondylic leg

11 Thoracic Appendages - Legs Modifications Digging (Fossorial) Mole cricket (Orthoptera:Gryllotalpidae)

12 Thoracic Appendages - Legs Modifications Saltatorial (jumping) Migratory locust (Orthoptera: Locustidae)

13 Thoracic Appendages - Legs Modifications Natorial (swimming) Predaceous diving beetle (Coleoptera:Dytiscidae)

14 Thoracic Appendages - Legs Modifications Pneustonic (water surface) Whirlig beetle (Coleoptera: Gyrinidae)

15 Thoracic Appendages - Legs Modifications Apposition (grasping)

16 Thoracic Appendages - Legs Modifications Cursorial (running) Tiger beetle (Coleoptera: Cicindellidae)

17 Thoracic Appendages - Legs Modifications Suction (mating pads) Predaceous diving beetle (Coleoptera:Dytiscidae)

18 Thoracic Appendages - Wings Development cuticle haemocoel Evagination of body wall 1. 2. blood(hemolymph) trachea nerve cuticle epidermis vein

19 The Insect Wing costa subcosta radius medial cubitus anal jugal C Sc R RS MA MP CuA CuP A J

20 The Insect Wing Wing modifications Dragonfly (Odonata) -archedictyon

21 Evolutionary Trends 1. Reduce number of cross veins = loss of weight 2. Fuse or lose longitudinal veins 3. Less sclerotization 4. Reduce fluting except on anterior

22 The Insect Wing Wing folding

23 The Insect Wing Wing folding Melolontha

24 Wing Coupling Paleoptera

25 Wing Coupling Frenate (Lepidoptera) frenulum retinaculum male female

26 Wing Coupling Hamate (Hymenoptera) Hamuli (hooks)

27 Wing Coupling Jugate (Lepidoptera)

28 Wing Coupling Overlap (Lepidoptera)

29 The Insect Wing Wing modifications Elytra (Several Orders) elytra

30 The Insect Wing Wing modifications Hemelytra (True Bugs - Hemiptera)

31 The Insect Wing Wing modifications Halteres

32 Next time INSECT FLIGHT

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