A new sheet-web-building spider has been discovered, Islandiana lewisi, that is found only in a single cave in the world, Stygeon River Cave, in southern Indiana. Sheet weavers, also known as dwarf or money spiders, grow no larger than a few centimeters in length. They create flat sheet-like webs.

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A new sheet-web-building spider has been discovered, Islandiana lewisi, that is found only in a single cave in the world, Stygeon River Cave, in southern Indiana. Sheet weavers, also known as dwarf or money spiders, grow no larger than a few centimeters in length. They create flat sheet-like webs.