The Evolution of Insects 2

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The Evolution of Insects -2
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• Neoptera with Complete Metamorphosis

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Order Neuroptera Green Lacewings
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Study Questions

• What do adults feed on?
• What do the larvae feed on?

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Dobson fly male aquatic larvae known as
hellgramites
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Study Questions

• In what specific environment would you look to
  find a hellgrammite larva?

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Adult Antlion
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Ant lion larva - builds conical pits in fine sand
and consume ants that fall in
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Order Coleoptera carrion beetle Female buries
carcass and oviposits This particular species
is on the federal Endangered Species list
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Family Scarabaeidae rhinocerus beetle - despite
their fierce appearance, all known species are
phytophagous
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Study Questions

• Give the common names of at least 3 species of
  scarabs that are very common throughout Indiana.

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Family Curculionidae weevils the boll weevils
extensive damage to cotton forced the South away
from monoculture
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Family Elateridae click beetles A favorite of
children adults have a clicking mechanism that
enables them to do somersaults!
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Family Cicindellidae - tiger beetles very agile
predators!
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Study Questions

• Where precisely would you look to find the larvae
  of tiger beetles?
• What do the larvae feed on?

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An ichneumon wasp searching for larvae to
sting
ovipositor
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Two caterpillar hunters mating Family Sphecidae
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Study Questions

• Is this a wasp or a bee? Why?

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Order Lepidoptera swallowtail butterfly
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Swallowtail larva
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Order Lepidoptera Family Sphingidae sphinx
moths
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Diptera Family Muscidae face flies
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Family Tipulidae crane flies none bite all
are phytophagous
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Family Culicidae mosquitoes many of
medical/veterinary importance
Adult emergence from pupal skin
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Family Asilidae robber flies predators of many
small, flying insects
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Robber fly attacking small katydid
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Flower flies adults are wasp mimics larvae are
aphid predators
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Order Siphonaptera fleas some are vectors of
plague
Note wingless condition Setae pointing
backwards long back legs
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Major Events in the Evolution of Insects
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What Do the Arrows Tell Us?
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What Do the Arrows Tell Us?
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Major Steps in Insect Evolution Superimposed on
a Geological time Scale
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Relative Size of Insect Orders ( of described
species)
Note 3 scales
Note 3 scales
Note 3 scales
Note 3 scales