Insect orders with incomplete transformation and their characteristics

An insect with incomplete transformation (with direct development) goes through three stages in its development: an egg – a larva – an adult insect (imago).

Insect orders with incomplete transformation: Orthoptera, Homoptera, bugs (hemiptera), dragonflies, cockroaches, praying mantises, mayflies, stoneflies, earwigs, lice.
The larvae are very similar to their parents and differ from adult insects only in their smaller size, the absence of wings and the underdevelopment of the reproductive system.

The larvae molt several times, grow with each molt and become more and more similar to adult insects. Over time, they fully develop their wings and become sexually mature.

Dragonfly Squad

Dragonflies are well-known insects with a long, slender body and two pairs of strong transparent wings.

Dragonflies (especially large ones) are distinguished by their very fast and maneuverable flight. They are predators, catching insects (flies, mosquitoes, small butterflies) on the fly. Dragonflies have large compound eyes that provide an almost all-round view, and long legs, set with stiff hairs.

Dragonfly larvae are inactive, live in ponds, lakes, ditches with water, slowly flowing rivers. They are also predators and grab the crustaceans, larvae of other insects, tadpoles and fish fry swimming by by using the lower lip that can be thrown forward, which is called a mask.

Orthoptera squad

This group includes locusts, grasshoppers, crickets and bears. They have two pairs of wings (the front ones are denser than the hind ones), many have hopping hind limbs, and a gnawing mouth apparatus. Some locust species fly well. Locusts feed on plants, among grasshoppers there are both herbivorous species and predators, crickets are omnivores.

Homoptera squad

The Homoptera include cicadas and aphids. Their mouthparts are of a piercing-sucking type, and their wings are usually folded into a roof (“house”). Homoptera feed on plant sap.

Cicadas are large (up to 7 cm long) diurnal insects and are known for making very loud sounds with the help of special organs located below the base of the abdomen.

Aphids are small insects 0.5 – 6 mm long. Among them there are both winged and wingless forms. Many harm cultivated plants.

Squad Bedbugs, or Hemiptera

Representatives of this group are called so because their front wings (elytra) are dense in front and soft behind. The second pair of wings lies under the first. It is with the help of the second pair of wings that bugs can fly. Some, such as the bed bug, have no wings. The bugs have a piercing-sucking mouth apparatus. Among the bugs there are species that feed on plant juices, there are predators and bloodsuckers (bed bug).

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