Insect Wings, Structure and their Modifications

This ppt includes a brief summary about the Insect wings, their structure and modifications according to their habit and habitat.

1. Insect Wings and their MODIFICATIONs EDIted & CREATED By :- Vikas Kumar Student of B.sc Agriculture

2. WHAT ARE THE WINGS? “The wings may be defined as the flattened double layered expansion of the body wall which is composed of same constituents as the body wall have cuticle, epidermis and basement membrane, while its lumen consists of nerves, tracheae and the blood.”

3. STRUCTURE OF WINGS The archedictyon contained 6-8 longitudinal veins . These veins (and their branches) are named according to a system devised by Jhon Comstock and George Needham :- Costa (C) – The leading edge of the wing. Subcosta (Sc) – Second longitudinal vein ( behind the costa ), typically unbranched . Radius (R) - Third longitudinal vein, one to five branches reaches the wing margin. Medius (M) – Fourth longitudinal vein, one to four branches reaches the wing margin. Cubitus (Cu) – Fifth longitudinal vein, one to three branches reaches the wing margin. Anal veins (A1, A2, A3) – Unbranched veins behind the cubitus .

4. The insect wings are highly modified into various forms according to their habits and use . The distinct names have been termed to those forms:- Tegmina :- This type of condition is found in the fore wings of order Orthroptera , Dictyoptera and Phasmida . These type of wings are hardened , protective and leathery in nature. e.g. Forewings of Cockroach and Grasshopper

5. 2. Elytra: - Insects of the order Coleoptera and Dermaptera have these type of fore wings which are much hardened to form horny sheath which protect the membranous hind wings . Eg . Fore wings of beetles and weevils.

6. 3. Hemelytra: - This type of wings are mostly found in hemipterous insects wherein half of the forewings are thickened , their bases like elytra and remaining part as membranous and soft . Eg . Fore wings of heteropteran bugs.

7. 4. Halteres : - The hind wings of the insects belonging order Diptera are modified into knobbed thread like balancing structure known as Halteres or balancers. Eg . Hind wings of Fruit fly.

8. 5. Pseudohalteres : - These are the reduced fore wings of Insects belonging Strepsiptera . 6. Brachypterous : - These type of wings found in some grasshoppers which are short and this condition is called Brachypterous . Pseudohalteres Brachypterous

9. 7. Membranous Wings: - This type of wings are found in insects belonging to order Hymenoptera . These wings are thin and transparent in nature. Eg . Dragon Fly and Honey Bee.

10. 8. Scaly Wings: - These type of wings found in the insects belonging order Lepidoptera . These wings are covered with thin, small coloured scales and gives a attractive and beautiful appearance. Eg . Butterfly and Moths.

11. 12 For any questions or doubts you can find me: Twitter:- @ vikaskashyap __ Email:- Vikas Kashyap THANKS!