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Lab 2: Structure of the Insect Head

Pertinent Information Before Quiz. Spelling DOES countDifferent spellings could correlate to different structures

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Lab 2: Structure of the Insect Head

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    2. Pertinent Information Before Quiz Spelling DOES count Different spellings could correlate to different structures � credit to full credit lost on exam Plural and singular forms i.e. median ocellus, not median ocelli Be as specific as possible

    3. QUIZ 1. Describe what the orientation term �dorsal� means in reference to an insect. 2. What is a simple way to determine if you are observing the pro-, meso-, or metathorax? 3. Please provide a brief description of a suture. 4. Please list one insect, BESIDES a grasshopper, that you will be observing in lab today. 5. What is the name of your TA? 6. What specific part of the thorax is indicated by the pin?

    4. Review

    5. Antenna

    6. Review

    7. Review

    8. Important Terms Sutures and Sulci Suture: impressed line separating body segments Sulcus: impressed line separating sclerites Many of you labeled SCLERITES of the head as SUTURES or SULCI

    9. Points of Reference in Different Insects Areas of the cranium can be different Frontoclypeal area Occiput Postocciput Subgenal areas

    10. Points of Reference in Different Insects Frontoclypeal Area Various forms Ex. Grasshopper vs. House Fly

    11. Special Case: The House Fly Face: depressed triangular region with antennae (aristate) Frons: area above antennae Ptilinal sulcus: groove where ptilinum (balloon-like structure) was withdrawn

    12. Special Case: The House Fly

    13. The Ptilinum http://www.youtube.com/watch?v=SR0Cko6z5jM

    14. Points of Reference in Different Insects Sutures and sulci Frontal sutures Epistomal sulcus Subgenal sulci Occipital suture Postoccipital suture Anterior tentorial pits Median ocellus Antennae

    15. Points of Reference in Different Insects Many features not well defined Read the text in your manual!!

    16. Today�s Lab

    17. Assignment You may work in teams Dissect grasshopper head Observe cricket, caterpillar, stink bug, honey bee, and house fly heads Complete diagrams and sketches

    18. Any Questions?

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