InsectsPosted on May 18, 2018 - Last modified: September 8, 2018
Insects are anthropods (Phylum that encompasses invertebrate living beings (Without bone structure) and with articulated appendages), with articulated limbs in many of its points and a body segmented into 3 parts, head, thorax and abdomen. The word insect finds its etymology from Latin, which means cut off.
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All insects have a pair of before, three pairs of legs and can have up to two pairs of wings, although not necessarily. They are commonly small living beings. Insects are the largest animal group on earth, with up to one million different species estimated.
They fulfill a truly important function in the ecosystem, since they are the main hunters of other invertebrates, thus controlling the pests that could form. They also have a very important role in the pollination of plants, mainly bees, they ensure that pollen can germinate and eliminate a large part of organic matter, although they are also capable of creating great damage to crops, since they can destroy a third of plantations rapidly and are spreaders of diseases that mainly affect humans.
Groups of insects
We can divide insects into 8 large common groups.
Odonata insects have a broad head and a stretched abdomen, 4 membrane wings that cannot be stored in the abdomen, an example is dragonflies.
The dichotomous insects have antennae with many joints, vertical head (hypognata) with the teeth inwards, the most common of these insects are cockroaches, termites and praying mantises.
The dermaptera at its posterior end have tweezers and are elongated and generally flat, like the scissor or the cutter.
Orthoptera are hypognant-headed, with great mobility in the prothorax and their antennae are between their eyes. Grasshoppers, crickets, and scorpions are the most common.
Diptera have two membranous wings instead of 4, their wings are called halteres, they are wings that allow them to direct flight in any direction easily. The most common are mosquitoes and flies.
Coleoptera's mouth allows them to chew and they can live in any type of habitat, with a hard exoskeleton. The most common are beetles.
Lepidopteran insects undergo metamorphosis, they are generally flying insects. There are diurnal (Butterflies) and nocturnal (Moths).
Hymenopterans have two pairs of membranous wings, the females have a structure to deposit eggs at the end of their abdomen. The most common insects are the wasp, the bee and the ant.
They are those that feed on decomposing organic materials, litter, carrion and manure.
The vast majority of this type of animal feed on plant tissue.
They use live animals as a food source divided into two categories: Predators and parasites.
They are generally larger than their prey, they eat quickly. Many prey eat throughout their lives.
They live in or within the bodies of their hosts, they do not kill their guests immediately, only one host is needed during their lifetime, they are usually much smaller than their host but can reach the same size.
They are those insects that have a diet based on more than one type of food.