REN R205 Study Guide - Quiz Guide: Archaeognatha, Neoptera, Odonata
6 Apr 2016
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Monocondylic/dicondylic: refers of # of mandibles attached to the insect. Dicondylic: two parts of attachment of mandibles. Insects have 3 body parts: head, thorax, abdomen. Prothoracic in the front of the thorax mesothoracic in the middle of the thorax metathoracic. Apterygote (wingless) insects look like a mini adult when they hatch. Pterygote (winged) insects can look very different from the adults when they hatch: juveniles often: Lack wings, have different body forms: metamorphosis is necessary to reach adult stage. A in front of a word usually means without something. Wings lost secondarily: ancestors had wings, during evolution lost wings young resemble the adult form little visible change in appearance as the young grow. Wings develop outside the body young stages nymphs resemble the adults. Instars: another word for nymphs nymphs: young, juvenile. Not all hemimetabolous insects have 4 insect life cycles stages, can have more: examples, grasshoppers, praying mantis. Young stages ( larvae ) do not resemble the adults.
