THE INSECT HEAD AND ITS APPENDAGES

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THE INSECT HEADANDITS APPENDAGES
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http//www.cals.ncsu.edu/course/ent425/tutorial/in
dex.html
An good web site for insect anatomy
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Head Capsule
Neck
Mouthparts
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Some general terms
Sulcus - a groove - line of strength
Suture - where two sclerites meet - line of
weakness
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Head Segmentation
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Insect Heads
3 basic types
Prognathous
?
?
Hypognathous
Opisthorhynchous
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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 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
Molar surface
Mandible
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)
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
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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Modifications of Mouthparts
Cutting and Sponging
Labrum
Mandibles
Hypopharynx
Labellum
Maxillae
e. g. deerflies
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Modifications of Mouthparts
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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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Insect Antenna
Antennal sclerite
Antennal socket
Pedicel
Flagellum
Antennal suture
Antennifer
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