07b Insects-1 - Phylum Arthropoda Class Hexapoda The...

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Phylum Arthropoda Class Hexapoda The Insects TEST 2 Monday, June 13, 2011
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Overview of the insects Monday, June 13, 2011
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A natural, monophyletic class Metamerism, tagmosis and serial homology ~monophylitic- arising froma single ancestor Monday, June 13, 2011
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6-segmented head 3-segmented thorax 11-segmented abdomen antenna compound eyes 3 pairs mouth appendages 3 pairs thoracic appendages, 2 pr. wings, 2 pr. spiracles No appendages, except 2 pairs of leg bases, 8 pr. of spiracles Monday, June 13, 2011
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Classification based largely on mode of development Monday, June 13, 2011
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Basic life cycle pattern Immatures (nymphs or larvae) Adults grow grow reproduce reproduce Note: insect larvae/nymphs are not equivalent to crustacean larvae Monday, June 13, 2011
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Primitive insects are wingless and ametabolous a collembolan ~once insects evolve wings, they stop growing and become adults Monday, June 13, 2011
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No metamorphosis No wings Hemimetabolous Wing buds external Division Apterygota Division Pterygota Subclass Exopterygota Orders: Odonata Isoptera Orthoptera Hemiptera (immatures= nymphs) Holometabolous Wing buds internal Division Pterygota Subclass Endopterygota Orders: Coleoptera Lepidoptera Diptera Hymenoptera (immatures= larvae) hymen= membrane Monday, June 13, 2011
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A nymph Monday, June 13, 2011
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An adult damselfly Monday, June 13, 2011
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A hemimetabolous life cycle: grasshopper Monday, June 13, 2011
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Monday, June 13, 2011
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Monday, June 13, 2011
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Monday, June 13, 2011
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Monday, June 13, 2011
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Monday, June 13, 2011
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No metamorphosis No wings Hemimetabolous Wing buds external Division Apterygota Division Pterygota Subclass Exopterygota Orders: Odonata Isoptera Orthoptera Hemiptera (immatures= nymphs) Holometabolous Wing buds internal Division Pterygota Subclass Endopterygota Orders: Coleoptera Lepidoptera Diptera Hymenoptera (immatures= larvae) Monday, June 13, 2011
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Beetle pupa And pharate pupa Monday, June 13, 2011
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A holometabolous life cycle: the monarch butterfly Monday, June 13, 2011
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07b Insects-1 - Phylum Arthropoda Class Hexapoda The...

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