Not a genus but a family: the curtain-web spiders, builders of the enormous layered sheet webs that the Linothele and Diplura pages describe, and a label that appears when material arrives identified no further than that.
Everything at this rank shares the family signature: prodigious silk output, a funnel retreat with the spider waiting at the mouth, real speed at the strike, long spinnerets, and a bite that is unpleasant without medical weight. Keeping is anchor points, moderate humidity, and prey delivered to the sheet.
Family-level listings are usually South American import stock awaiting a genus, identification rests on the photographs, and prices form without anchors. The webbing is the product regardless of what the animal turns out to be, and it is the most webbing per animal the hobby offers.
The line on each tile: lowest ask per day.
Rarity BETA Rarity is supply, and only supply: the tier is how many sellers have ever carried a species, and for a single seller, how many separate listings. Price is not part of it, and neither is how recently it appeared. Tiers are given to tarantula species only.