Help identify icon Help identify this spider. Submitted Calendar icon ; P.ographed Picture icon . ruffb09. Location icon Michigan . - American house spider. Species: Parasteatoda tepidariorum. Size: Between millimeters. Where can you find them?: Indoors and .Spiders are one of the most common, easily recognizable and beneficial of creatures The vast majority of spiders in Michigan are not venomous or dangerous, .