Springtail

The Springtail (Microfalcula delamarei) is a micro-small, wingless hexapod. A hexapod has three pairs of legs (6 legs), but it is not an insect. 

It is entognathous, which means that is has internal mouthparts in a gnathal (jaw) pouch. It is in the Collembola class and the Entomobryoidea super-family – like a terrestrial crustacean, because scientists think that it evolved from marine (saltwater) shrimp, crabs, and lobsters. Scientists first thought that it was an insect, but they have now changed the category to an entognathous animal.

The Springtail has three parts: the head capsule, a thorax (with three segments and 6 legs), and an abdomen (with five segments). Therefore, it looks like an insect. It has small antennae, two eyes, and mouthparts. The mouthparts have a pair of jaws. The two eyes are called composed eyes, because they are composed of 8 single eyes. It does not have a throat, so it breathes through a porous cuticle. 

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One foot, two feet …

What is an animal with one foot, two feet, three feet …?

An appendage, such as a foot or a leg, is used for locomotion – walking, moving, or running.

Ped or pod means foot (leg) or feet (legs).

A mollusk, such as a snail or a slug, is an example of an animal with one foot. It is a gastropod – it is a body of one piece. Gastropod means stomach foot.

An animal that walks with two feet is a biped. A bird is a biped.

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