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Nursery web spiders (Pisauridae) are a family of araneomorph spiders first described by Eugène Simon in 1890. [1] Females of the family are known for building special nursery webs. When their eggs are about to hatch, a female spider builds a tent-like web, places her egg sac inside, and stands guard outside, hence the family's common name.
Female carrying egg sac. Pardosa amentata is a wolf spider between 5 mm and 8 mm in length and has a brownish coloured body with darker brown markings or spots. Its body is divided into two parts, the cephalothorax and the abdomen.
Wolf spiders resemble nursery web spiders (family Pisauridae), but wolf spiders carry their egg sacs by attaching them to their spinnerets, while the Pisauridae carry their egg sacs with their chelicerae and pedipalps. Two of the wolf spider's eight eyes are large and prominent; this distinguishes them from nursery web spiders, whose eyes are ...
A photo shows the brown spiders, including a female with a robust egg sac. The new species carries fewer but larger eggs than other, similar species, researchers said.
A female wolf spider. You can see her two prominent central eyes (she has eight total) and she is dragging an egg sac by her spinnerets.
Nursery web spiders are known to be univoltine, [7] which means it only has one brood of offspring per year. The care of the offspring is typically solely the female's responsibility; from carrying eggs to maintaining the sac until hatching, the female does most of the work, and the male's role is very limited.
The Australian funnel-web spider is considered one of the world's deadliest arachnids. Its venom can kill a human within 15 minutes, Dr. Robert Raven, curator of arachnids at Queensland Museum ...
Female holding the egg sac. Carolina wolf spiders mate in late summer. The females carry the eggs, the sacs attached to their abdomen, during the approximately two week incubation period. [7] There tends to be two main egg carrying seasons, the first in late July and the second in late August. [11]