Spinneret

Spigots can be singular or found in groups, which also permits spiders to combine multiple filaments in different ways to produce many kinds of silk for various purposes.

[5] The desert grass spider, Agelenopsis aperta, has especially prominent spinnerets that extend out of the end of their abdomen.

[6] Various species of spiders use silk extruded from spinnerets to build webs, to transfer sperm, to entrap insects by wrapping it around them, to make egg-cases, to manipulate static electricity in the air, and to fly (ballooning), etc.

The insects known as web spinners weave silken galleries for protection from predators and the elements while foraging and breeding.

[7] Observations suggesting that there might be silk-producing organs on the feet of the zebra tarantula (Aphonopelma seemanni) led to questions about the origins of spinnerets.