Phantom spiders are vermin that occur in evil forest biomes. They are closely related to cave spiders; they produce webs that can be collected and woven into thread at a loom, and bite creatures to inject a venom. Note that stripping an area of available trees reduces the amount of webbing present due to dwarves trampling it. They can be a danger to dwarves because their venom paralyzes, and since they are vermin they are very difficult to see. However, their venom wears off after some time, and they are not unduly aggressive. Their extract is phantom spider venom, worth 20☼.
[NAME:phantom spider:phantom spiders:phantom spider]
[EXTRACT:phantom spider venom:7:0:0]
[EXTRACT_ANTIDOTE:phantom spider antivenin:7:0:0:50]