06 Introduction to Insects14
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Transcript of 06 Introduction to Insects14
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Introduction to Insects
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Outline
• Insects and their relatives
• How insects rule the world
•
Insect anatomy and biology
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Insects and their relatives
• Arthropods are numerous and diverse
– Insects (beetles, fies, moths, earwigs, aphids)
– Arachnids (spiders, ticks, mites, scorpions)
– Crustaceans (craysh, crabs, lobsters, sowbugs)
– Centipedes, millipedes
• !oskeleton is a hard outer shell
• "ointed appendages, segmented body• Not arthropods# slugs, snails, earthworms
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Basic insect body plan
Head
Thorax
Abdomen
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Basic insect body plan
HeadThorax
Abdomen
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Basic arachnid body plan
Cephalothorax
Abdomen
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Basic arachnid bodyplan
Cephalothorax
Abdomen
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Insects
• 3 bodyregions
• 1 pair ofantennae
• 3 pair of legs
• pair of
Arachnids
• bodyregions
• "oantennae
• # pair of
legs•
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Insects rule the !orld$
• $here are more
insects than all
other plants and
animals combined
• $here are more than
% million di&erentspecies
• % out o' every
animals is a beetle
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•
*mall si+e• ultigenerational
• -light
•
etamorphosis• .ide variety in
'ood choices
• .ide variety in
habitat resources
%hy are insects sosuccessful&
' (arlin )* +ice
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Insect metamorphosis
Completemetamorphosis, egg-larva- pupa- adult
e*g*- beetles-
Incompletemetamorphosis, egg-nymph- adult
e*g*- grasshoppers-Images from Cornell University, Http://nides.bc.ca/Assignments/Insects/Metamorphosis3.htm
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Insects eat everything
• Carnivore, animal matter
• Herbivore, plant matter
• /mnivore, plant and animal matter
• 0etrivore, organic matter
• *aprophore, decaying matter
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Are these insects&
' (arlin )* +ice
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Ho! to I/ insects, !ings
beetle
!asp butter.y .y
ear!iggrasshopper
true bug
. !esse
. !esse. !esse
' (arlin )* +ice ' (arlin )* +ice
' (arlin )* +ice
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Che!ing,grasshoppers-beetles-
praying
0iercing
suc2ing,mosuitoes-
true bugs
4iphoning,
butter.ies-moths
4pongin
g, house.y
Ho! to I/ insects,mouthparts
Images on this page from ". #essin, University of $ent%c&y
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Ho! to I/ insects,antennae
freenat%repict%res.com
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Ho! to I/ insects, legs
!al2ing
grasping
pollencarrying
digging 5umping
s!immingandgrasping
. !esse. !esse
' Marlin (. "ice
)a%
lM.Choate,Universit y
of*lorida
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4ummary
•
There are many keys to help in the accurateidentification of insects
• Wings, antennae, legs, mouthparts
' Marlin (. "ice