Mouth parts of insects The mouth parts of
- Slides: 7
Mouth parts of insects
The mouth parts of insects are variously modified in different insect groups to suit their specific mode of feeding The various mouth parts are A labrun An epipharynx A pair of mandiblies A pair of Ist maxillae second maxillae or labium A hypopharynx
Chewing or Mandibulate type of mouth parts of grass hopper • Latrum broad retangular plate • Mandibles are hard horny and with toothed inner margins for chewing food • A pair of maxilla used in manipulating food as it enters mouth • Broad median labium serve to hold the food which is worked on by mandibles and maxillae • Hypopharynx present in preoral cavity formed by labrum above and labium below
Chewing and Lapping mouth parts in Honey bee • Mandibles and labrum are of chewing type and are used for grasping prey or molding wax • Maxillae without lacinia, Galea are long blade like • Labium with reduced Paraglossa, elonogated Glossa to from channeled organ. Elongated labial palps present • Galea and labial palps when drawn closer from long hollow proboscis
Siphoning type of mouth parts in Butterflies • Labrm narrow band like • Mandibles reduced • Maxillary palps and lacinia vestigial Galea long deeply grooved to from proboscis • Labium reduced, bearing 3 joined labial plap • Hypopharynx and Salivary channel absent
Piercing and Sucking Type of Mouth parts in Mosquito • Labrum, mandible and maxillae are slender and long and fit together to from a delicate hollow needle. • Labium forms a stout sheath that holds this needle rigid. • The whole structure is called beak.
Sponging type of mouthparts in house fly • Mandibles and maxillae are non functional • Proboscis consists of Rostrum , haustellum and sucker. Hustellum has a groove in which lie Labrum – Epipharynx and Hypopharynx. Which form a food channel. • suker consists of two lobes labella which has on lower surface numerous transverse grooves Pseudotrachea.