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 Insect Morphology and SystematicsInsect Morphology and Systematics2.
Amplexiform:
It is the simplest form of wing coupling. A linking structure is absent. Coupling
is achieved by broad overlapping of adjacent margins. Eg: Butterflies.
3. Frenate:
There are two sub types. Eg: Fruit sucking moth.
(1) Male frenate:
Hindwing bears near the base of the costal margin a stout bristle called
frenulum which is normally held by a curved process, retinaculum arising from the subcostal
vein found on the under surface of the forewing.
(2) Female frenate:
Hindwing bears near the base of the costal margin a group of stout bristle
(frenulum) which lies beneath extended forewing and engages there in a retinaculum formed by
a patch of hairs near cubitus.
Frenate coupling - female
Frenate coupling - male
Insect Morphology and Systematics
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