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Velvet worm facts for kids

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Velvet worms
Velvet worm.jpg
A member of the Peripatidae family
Scientific classification

The velvet worms (Onychophora — literally "claw bearers") are a minor panarthropod phylum.

There are two families and about 200 species. All living species live on land, in moist or wet tropical areas.

The two living families are the Peripatidae and the Peripatopsidae. They show a peculiar distribution, with the peripatids being mainly equatorial and tropical, while the peripatopsids are all found in what used to be Gondwana.

The segmented worm-like organisms have tiny eyes, "fur", antennae, multiple pairs of legs, and, slime glands. The group is thought to be related to arthropods. They prey on smaller animals such as insects, which they catch by squirting a sticky slime.

Possible fossil history

Fossils from the early Cambrian bear a striking resemblance to the velvet worms. These fossils, known as the lobopods, were marine. They were a clade from which arthropods, tardigrades, and Onychophora arose. They are found in the Cambrian, Ordovician (possibly), Silurian, and Pennsylvanian periods.

Historically, all fossil Onychophora and lobopods were lumped into the taxon Xenusia. However, few of the Cambrian fossils have features that definitely unite them with the Onychophora. The exceptions are Hallucigenia and Collinsium ciliosum, which have distinctly onychophoran-like claws.

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See also

Kids robot.svg In Spanish: Onychophora para niños

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