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THE INSECT HEAD AND ITS APPENDAGES
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A good web site for insect anatomy
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Head Capsule Neck Mouthparts
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Head Segmentation
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Insect Head Occiput Compound Eyes Ocelli Frons Gena Clypeus Mandible
Labrum 1st Maxilla Labium (2nd Maxilla)
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? ? Insect Heads 3 basic types Prognathous Hypognathous
Opisthorhynchous
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Insect Heads Evolution of Prognathy 1. Hypostomal Bridge 2. Postgenal Bridge 3. Gula
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Insect Mouthparts
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Insect Mouthparts Labrum Mandible Hypopharynx 1st Maxilla Labium (2nd maxilla)
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Insect Mouthparts Labrum -”upper lip” - contains chemosensory sensilla
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Insect Mouthparts Mandible Molar surface Incisor surface
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Insect Mouthparts Mandible - in a grasshopper -a dicondylic joint -emphasize strength over mobility
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Insect Mouthparts 1st Maxilla Cardo Stipes Palp Lacinia Galea
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Insect Mouthparts Labium (2nd Maxilla) can be fused to form a Ligula
Submentum Mentum Prementum Glossa Palp Paraglossa can be fused to form a Ligula
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Comparison of 1st and 2nd Maxillae
Cardo Stipes Submentum Mentum Palp Lacinia Prementum Glossa Palp Paraglossa Galea
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Hypopharynx Labium Salivarium Hypopharynx Cibarium Cibarium
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Modifications of Mouthparts
-Piercing and Sucking Front Mandibles Maxillae Channel for food Back Channel for saliva
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Modifications of Mouthparts
Cutting and Sponging Labrum Mandibles Hypopharynx Labellum Maxillae e. g. deerflies
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Modifications of Mouthparts
Sponging e.g. housefly
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Modifications of Mouthparts
Siphoning e.g. butterfly
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Modifications of Mouthparts
Stabbing e.g. Mosquito
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Head Capsule Neck Mouthparts
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Tentorium - internal support for the head capsule Posterior arms Anterior arms Dorsal arms Cut away view of the head capsule
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Tentorium - internal support for the head capsule
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Insect Antenna Antennal sclerite Antennal socket Pedicel Flagellum Antennifer Antennal suture Scape
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Insect Antennae Monoliform Aristate Pectinate Capitate Plumose Clavate
Serrate Filiform Geniculate
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Insect Antennae Monoliform Aristate Capitate Pectinate Clavate Plumose
Filiform Serrate Geniculate
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