''Idionella rugosa'' is a species of

dwarf spider Erigoninae are the largest subfamily of sheet weavers (Linyphiidae), which is itself the second largest spider family. In the United States they are known as dwarf spiders, while they are called money spiders in England. The exact taxonomic lim ...

in the family

Linyphiidae Linyphiidae, spiders commonly known as sheet weavers (from the shape of their webs), or money spiders (in the United Kingdom, Ireland, Australia, New Zealand, and in Portugal, from the superstition that if such a spider is seen running on you, ...

. It is found in the United States.

References

Linyphiidae Articles created by Qbugbot Spiders described in 1905 {{linyphiidae-stub