Sisis is a genus of North American sheet weavers that was first described by S. C. Bishop & C. R. Crosby in 1938. As of May 2019 it contains only two species, both found in Canada and the United States: S. plesius and S. rotundus. See also. List of Linyphiidae species (Q–Z) References. https://en.wikipedia.org/wiki/Sisis