amaurobiid

Amaurobiid spiders are a family of approximately 680 species found worldwide. They are characterized by a cribellum (a spinning organ that produces fine silk threads) and three tarsal claws. These spiders resemble those in the family Agelenidae and construct irregular funnel webs, typically found between stones.1

Spiders, in general, are arachnids with an unsegmented abdomen attached to the cephalothorax. They possess poison glands in their chelicerae, leg-like pedipalps, and spinnerets at the posterior end of the abdomen. While over 51,000 spider species exist, only a small fraction are considered dangerous to humans, and even fewer have caused fatalities. Spiderlings resemble adults and grow by molting. The number of molts varies by species and sex, with males generally molting fewer times than females.123