Aren t spiders insects? Why aren t spiders insects?

Spiders are not insects, but belong to the class Arachnids among arthropods. Flies, mosquitoes, crickets, bees, etc., are our most common insects, and they belong to the class of insects in arthropods. Spiders and insects belong to different branches in arthropods.

Spiders and insects belong to the same phylum Arthropod, spiders belong to the subphylum Arachnida, and insects belong to the class Insecta. The common feature of spiders and insects is that their bodies are segmented, with single and compound eyes. However, the body of a spider is divided into two segments, the head and abdomen, while the insect has three segments: the head, thorax and abdomen.

Arachnids have four pairs of legs, and insects have three pairs of legs. So spiders are not insects.

Insects have three pairs of legs and can crawl: some insects have feet that specialize into jumping feet and can jump: most insects have wings and can fly.

Insects are the only animals among invertebrates that can fly. The body of an insect is divided into three parts: head, thorax, and abdomen. Insects are taxonomically arthropods.

In addition to insects, arthropods also include spiders, centipedes, shrimps, crabs, etc., and their common feature is that the body is composed of many segments: there are exoskeletons outside the body surface: feet, antennae and segmentation.

Spiders do not meet the above criteria and are classified as arthropods.

Yes, it's an insect. Because insects all have a pair of compound eyes or antennae.

No. Insects are six-legged.

Spiders have eight legs.

Not really! Insects with six legs! There are eight spiders!

No, spiders are arthropods, eight-legged.

An insect is defined as having a pair of antennae, a pair of eyes, two sets of wings, and six legs.

Obviously, spiders do not qualify, spiders are arthropods, and centipedes and so on are of the same class.

No. Spiders are arthropods.

Insects are characterized by six legs.

No. It has too many eyes.

There is no three-part body shape.

Neither can the hands and feet.

A sucker!! Asking such a stupid question!! Yes, of course!!

Insects have three pairs of legs and can crawl: some insects have feet that specialize into jumping feet, which can jump.

Oh my God, I always thought it was an insect

If spiders are insects, are shrimps insects?

Yes, to be exact.

Arachnids of the phylum Arthropoda.

Spiders do not possess the morphological characteristics of the class Insecta. The body of the insect is divided into three segments: head, thorax and abdomen, 1 pair of antennae, 1 pair of compound eyes, 2 pairs of wings and 3 pairs of legs. The spider is divided into two parts: cephalothorax (precursor) and abdomen (posterior), no antennae, no compound eyes, no wings, 8 pairs of legs, only 8 single eyes, and one single eye.

So spiders are not considered insects and belong to the arachnids of the order Arachnids under the phylum Arthropods.

Why can't spiders be treated as insects? To understand this, let's first look at what an insect is.

Flies, mosquitoes, locusts, crickets, bees, and colorful butterflies are all insects. Although they don't look the same, they share some common characteristics. Here it is:

The body is segmented to form three parts: the head, the chest, and the abdomen. on the head there is a pair of antennae and a pair of round, large compound eyes; The thorax usually has two pairs of wings (there are also some species that have only one pair of wings, such as flies, mosquitoes, or completely vestigial wings, such as fleas, lice) and three pairs of legs. Entomologists all recognize these characteristics as the criteria for identifying insects.

Of course, due to the complexity of the living environment, some insects gradually degenerate their unused organs in the process of adapting to the environment for a long time, such as the wings of lice and fleas, but other characteristics are still consistent with the above criteria.

Let's take a look at the structure of the spider:

The spider's body is divided into two parts: cephalothorax (anterior) and abdomen (posterior), and the cephalothorax is covered with a dorsal armor and a chest plate. No antennae, no wings, no compound eyes, only one eye, generally 8 eyes, but there are also eyes, some genera even have no eyes, in terms of the color and function of the eyes, and divided into night and day. The spider has 4 pairs of feet, which are divided into basal segments, rotating segments, leg segments, knee segments, tibial segments, posterior tarsal segments, tarsal segments, and tarsal terminal segments (upper claws).

The feet are covered with bristles and have several sensory organs, such as elongated bristles (which sense air currents and vibrations). After self-cutting, it can be regenerated the next time it molts.

Measured by the standards of insects, it is clear that spiders cannot be called insects. But spiders, like insects, belong to the large family of the phylum Arthropods of invertebrates, spiders are arachnids of the phylum Arthropoda, and insects are insectaceous of the phylum Arthropoda, and there is a lot in common between the two. Many Westerners, including the famous Fabre, classify spiders and scorpions as insects, which fully shows that the relationship between them is very close.

Spiders, like scorpions and centipedes, do not belong to insects, because the basic characteristics of insects are three heads and abdomen, 2 pairs of wings and 6 legs, spiders belong to the phylum Arthropods, Arachnida, and the common name of all species of the order Arachnids is terrestrial. Spiders are highly sensitive to changes in environmental factors including habitat structure, habitat type, wind, humidity and temperature, and can be used as an indicator group to monitor habitat and biodiversity changes. Hope it helps

Summary. Dear happy to answer for you, dear, spiders are not insects! It has eight legs and belongs to arthropods, and its body hair is used to perceive the outside world.

Are spiders insects?

Dear happy to answer for you, dear, spiders are not insects! It has eight legs and belongs to arthropods, and its body hair is used to perceive the outside world.

Spiders are not insects, but arthropods of the phylum Arthropod, Chelicera, and Arachnida, also known as webworms, flat spiders, garden spiders, and kiko, whose bodies are divided into cephalothorax and abdomen, with 3 pairs of feet, they will spit out digestive juices when eating, and wait for the food to decompose before sucking the liquefied food, but the insects are divided into three parts: head, thorax, and abdomen, and there are 2 pairs of wings in addition to 3 pairs of feet.

Spiders are not insects, but belong to the arachnids of arthropods, and insects belong to different branches of arthropods。The main characteristics of insects are: the body is divided into three parts: head, thorax and abdomen, with three pairs of feet and two pairs of wings, and the internal and external morphological changes during growth and development.

The body of the spider is only 2 parts, it has 8 legs, and it does not undergo morphological changes during development.

Spiders are the most abundant predatory natural enemies in terrestrial ecosystems, and their role in maintaining the stability of agricultural and forestry ecosystems cannot be ignored. The body is 1 90 mm long, and the body is divided into two parts: cephalothorax (anterior) and abdominal (posterior), and the cephalothorax is covered with dorsal armor and chest plate.

The habits of spiders

Spiders feed on insects, other spiders, myriapods, and some spiders also feed on small animals. Jumping spiders have good eyesight and can dive within 30 centimeters to catch their prey and pounce on them. Crab spiders wait for their prey on flowers that are similar to their body color.

Spiders burrowing in the earth build burrows lined with silk, and the entrance of the burrow has a trap that opens at night to prey on insects that pass through the hole. funnel spiders weave funnel webs, and insects fall into the nets to cause vibration; The spider itself resides in a filament tube with a narrow end that leads into a plant or a crevice in a rock.