3. Exo external 2010

3. Exo external 2010 - 5 Labial palp Labrum Hypopharynx...

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1 Exoskeleton and External Morphology TRACHEATA Tracheae Spiracles TRACHEATA TRACHEATA Non-Insectan Hexapods - Compromised arthropod body plan - Highly specialized for moist habitats
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2 Non-Insectan Hexapods Cutaneous respiration Collembola Entognathous mouthparts sclerites membrane Insecta sclerite membrane Integument Morphology is critical for insect identification
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3 Comparative morphology shows the reasons for the success of insects Generalized Insect - Grasshopper Three tagmata: Head, Thorax, abdomen Head = Fusion - Comprised of 6 segments ?
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4 Tentorium Labium Maxilla Mandible Labrum Antenna Ventral nerve cord Homeotic Mutants Mouthparts Hypognathus Prognathus Opisognathus Orientation of mouthparts
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Unformatted text preview: 5 Labial palp Labrum Hypopharynx Galea Butterfly Horsefly Modifications of Mouthparts Different types within a life history; larva different from adult Sensory Structures Eyes – compound and simple 6 Antenna Types of Antennae Flagel um Pedicel Scape Thorax = Rigid- Comprised of 3 segments Abdomen = Flexible- Comprised of 11 segments 7 Genitalia are modified appendages Female = Ovipositor Females: modified appendages of the 8 th and 9 th segments Female wasp stinger = modified ovipositor 8 Male = Claspers Males: modified appendages of the 9th segment Cerci Appendages of the 11 th segment; sensory...
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3. Exo external 2010 - 5 Labial palp Labrum Hypopharynx...

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