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Spider Photos - Lace Web Spiders

Lace webbed spider is a name given to two common species of house spiders of the genus Amaurobius; A. similis and A. fenestralis. The spiders are often found near windows, hence the Latin root of the name A. fenestralis, with A. similis later defined as a separate, but similar, species, and being named accordingly. Male A. similis Lace webbed spiders vary in body size from 7 mm to 12 mm, with large, strong legs. While the species are similar, with the young virtually indistinguishable, A. similis tends to be larger and darker in colouration when an adult, and prefers the indoors. The smaller, lighter A. fenestralis is rarely found inside, and is often observed on outside walls, or on trees, especially under loose bark. Both species have V-shaped markings on their abdomens, with A. fenestralis having two or three of these, and A. similis usually having four. For precise identification, spider genitalia may need to be checked for characteristic differences in the species. All members of the family Amaurobiidae are nocturnal, and their bluish silk, woven into a funnel, is combed into a frayed texture with a calamistrum, a row of stiff hairs on the rear legs. Much like Velcro, the barbed hooks of insects get caught in the furry web, allowing the catching of much larger prey than the spider itself. Around the second year of life, Amaurobiidae spiders lay an average of 40 eggs in a breeding chamber spun of silk, where the mother will protect the eggs until hatching. When the young are born, they will consume their egg yolk, and then devour their mother before emerging from the chamber.  Info & Photo: Wikipedia
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LACE WEB SPIDERS
(
A. similis and A. fenestralis)

Reply: Could be a lace web spider - glen

29 June, 2015:
Hello. I found this spider on a wall, after the light had been off for some time. From my eyes view, the eye pattern it looks like two pairs of eyes in the middle, one below the other and an eye on each side (kinda looks like those evil eyes they draw in cartoons). As for size, body= approx. 1cm. Legspan= approx. 2.2 cm. It is quite fast, and does no leg movements for aggression except its fangs and pedipalps extend. From there it runs (9/10 times towards you) or it twitches its abdomen, raising it slightly. Another thing is that we had a decent size of things enter the house, so their is a probability of it coming from inside a bix maybe. I live in British Columbia, Canada. Thankyou in advance for your time to help me out :) -Liza

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