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Biology 3451 Entomology Introduction.

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Presentation on theme: "Biology 3451 Entomology Introduction."— Presentation transcript:

1 Biology 3451 Entomology Introduction

2 How the course is organized
Part 1: Guts ‘n’ Gonads Internal and External Structure 1. All major body sections + associated appendages 2. All major organ systems and how they work. Part 2: Tiptoe through the Orders 1. Insect evolution and paleontology 2. Characteristics of the insect orders and how they are related Part 3: Assorted and Fascinating Topics - such as: communication, overwintering strategies, mating systems, forensic entomology

3 Why we care about insects.
1. Annoyance/Disease 2. Competition 3. Providers 4. Fascination 5. Mythology

4 History of Entomology Eygptian Mythology - scarab (dung ) beetle Cartouche of Pharaohs

5 History of Entomology Aristotle ( BC) History of the Animals On the Parts of Animals On the Generation of Animals Contributions 1. Observations on behaviour/natural history 2. First attempt at taxonomy 3. Applied entomology (pest control) 4. Recognized metamorphosis

6 History of Entomology Pliny the Elder ( AD) Historica Naturalis

7 History of Entomology Albertus Magnus ( ) De Animalibus -covered 33 insect species

8 History of Entomology Anton van Leeuwenhoek ( ) microscopy described viviparity and parthenogensis in aphids

9 History of Entomology Marcello Malpighi ( ) -published first detailed anatomy of any invertebrate (Bombyx)

10 History of Entomology Jan Swammerdam ( ) (“Father of Entomology”) -microanatomical studies (mayfly, honeybee)

11 History of Entomology John Ray ( ) -scheme for classification of all living things (including insects)

12 History of Entomology Carl von Linné ( ) (Linnaeus) binomial classification system described over 2000 species of insects

13 History of Entomology J.C. Fabricius ( ) student of Linnaeus classified insects based on mouthparts Systema Entomologica (1775) -basis of insect classification Philosophia Entomologica (1778) -first entomology text - described >10,000 species

14 History of Entomology P.F.M.A. Dejean ( ) -first to specialize on one group of insects - described >22,000 species of beetles

15 History of Entomology Thomas Say ( ) -wrote first treatise on insects in North America “American Entomology”

16 History of Entomology Swammerdam Von Leeuwenhoek Say Ray Fabricius
Aristotle Pliny the Elder Albertus Magnus Invention of microscope Swammerdam Von Leeuwenhoek Say Ray Fabricius Malpighi Linnaeus

17 PHYLOGENY Arthropoda Hexapoda Crustacea (crabs, lobsters, barnacles)
Pauropoda Diplopoda (millipedes) Myriapoda Chilopoda (centipedes) Arthropoda Symphyla Arachnida (spiders, mites, ticks) Eurypterida (sea scorpions) Chelicerata Xiphosura (horseshoe crabs) Pycnogonida (sea spiders) Trilobita (trilobites)

18 PHYLOGENY Arthropoda Hexapoda Crustacea (crabs, lobsters, barnacles)
Pauropoda Diplopoda (millipedes) Myriapoda Chilopoda (centipedes) Arthropoda Symphyla Arachnida (spiders, mites, ticks) Eurypterida (sea scorpions) Chelicerata Xiphosura (horseshoe crabs) Pycnogonida (sea spiders) Trilobita (trilobites)

19 The Insect Orders Collembola Protura Hexapoda Diplura Insecta

20 The Insect Orders Insecta Archaeognatha Thysanura Ephemeroptera
Paleoptera Odonata Pterygota Plecoptera Embiidina Orthopteroids Phasmida Orthoptera Mantophasmatodea Zoraptera Dictyoptera Grylloblatodea Neoptera Hemipteroids Psocodea Thysanoptera Hemiptera Endopterygota

21 The Insect Orders (continued
Archaeognatha Insecta Thysanura Paleoptera Orthopteroids Megaloptera Pterygota Rhaphidioptera Neuroptera Neoptera Hemipteroids Coleoptera ? Strepsiptera Endopterygota Diptera Mecoptera Siphonaptera Trichoptera Lepidoptera Hymenoptera

22 Animal Abundance - Number of Species

23 Relative Abundance of the Major Insect Divisions
From the phylogenetic tree: Endopterygota = Coleopteroids + Strepsiptera + Lepidopteroids + Dipteroids Hymenoptera Exopterygota = Hemipteroids + Paleoptera + Orthopteroids Apterygota = Thysanura + Archaeognatha

24 Insect Orders - Number of Species

25 Insect Orders - Number of Species (log plot)

26 2. Reproductive capacity & adaptibility
WHY ARE INSECTS SO SUCCESSFUL? 1. Ability to fly 2. Reproductive capacity & adaptibility 3. Resist drying - exoskeleton 4. Small size 5. Metamorphosis

27 Next time Why insects are crunchy!


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