1 Announcements Field trip to Pepperwood this Sunday. Meet at SSU at 9:00 am. Will last until 4:30 or so, bring sack lunch and water if interested Exam on Monday Will cover material since first lecture Emphasis on topics and terms covered in lecture and study guide Legs Legs
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Announcements - sonoma.edu file3 Leg Adaptations Legs wings •Usually fully developed only in adult •Flap-like projections of cuticle with tubular, sclerotized veins •Primitively
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1
Announcements
Field trip to Pepperwood this Sunday.Meet at SSU at 9:00 am.Will last until 4:30 or so, bringsack lunch and water if interested
Exam on MondayWill cover material since firstlecture
Emphasis on topics and termscovered in lecture and study guide
Legs
Legs
2
Pretarsus
Leg Adaptations
Leg Adaptations
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Leg Adaptations
Legs
wings• Usually fully developed only in adult• Flap-like projections of cuticle with tubular, sclerotized
veins• Primitively 2 wings to metathorax and two to mesothorax• Hindwings
– Tend to be smaller– Sometimes only functional wings
• Modified in flies to halteres
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Wings
Supported by tubularveins with tracheae,blood vessels, nervefibers
• Groundplan of six veins– Anterior
• Costa- never branches• Subcosta- branches sometimes into two
– Radius– Media– Cubitus– Anal
• Cells are areas defined by veins– Open- extend to margin– Closed- surrounded by veins
• Veination often genus or species specific
Wings
Wings
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Variation in wing morphology
Membranous wings
Orthoptera
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Coleoptera
Hemiptera
Lepidoptera
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Abdomen• Least tagmatized body region• Large and conspicuous spiracles• First seven segments progenital
Primitive condition has appendages
Left: aquatic insectRight: ancient vs modern insect