Ward_Lect32A_Arthropoda 2_ppt

Ward_Lect32A_Arthropoda 2_ppt - BIS2C Winter 2010 (Ward)...

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BIS2C Winter 2010 (Ward) Lecture 32. Arthropoda, Part 2 Today’s 2 nd lecture (5 March) excerpt from “Life in the Undergrowth” Hexapoda wing evolution metamorphosis coevolution with angiosperms social insects Monday’s lecture Echinodermata
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Chelicerates (arachnids, horseshoe crabs, sea spiders ) A HC SS Myriapods (centipedes, millipedes) Trilobita (extinct) Sea spider (Pycnogonida) Hexapods (insects and relatives) Crustaceans (crabs, shrimp, etc.) Emerging consensus on phylogeny of Arthropoda A = arachnids HC = horseshoe crabs SS = sea spiders
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Chelicerates (arachnids, horseshoe crabs, sea spiders) Myriapods (centipedes, millipedes) Trilobita (extinct) Hexapods are the most diverse subgroup of arthropods Crustaceans (crabs, shrimp, etc.) Hexapods (insects and relatives) Emerging consensus on phylogeny of Arthropoda
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Chelicerates (arachnids, horseshoe crabs, sea spiders) Myriapods (centipedes, millipedes) Trilobita (extinct) Hexapods (insects and relatives) Crustaceans (crabs, shrimp, etc.) Numbers of described living species in each arthropod group 90,000 14,000 50,000 1,000,000 Hexapods are the most diverse subgroup of arthropods
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Numbers of described species among the major animal groups (from Wilson, 1992). Arthropoda
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Numbers of described species among the major animal groups (from Wilson, 1992). Hexapoda
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Numbers of described species among the major animal groups (from Wilson, 1992). just three insect orders contribute half of all described animal species
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Numbers of described species among the major animal groups (from Wilson, 1992). “an inordinate fondness for beetles” (J. B. S. Haldane)
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Hexapods: numerous beneficial and harmful species
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Hexapoda – insects and allies three tagmata : head, thorax and abdomen
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Hexapoda – insects and allies three tagmata: head, thorax and abdomen one pair of antennae (two pairs in other crustaceans)
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three tagmata: head, thorax and abdomen
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This document was uploaded on 08/21/2011.

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Ward_Lect32A_Arthropoda 2_ppt - BIS2C Winter 2010 (Ward)...

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