习水肥腹蛛，动物界-节肢动物门-蛛形纲-蜘蛛目-球蛛科-肥腹蛛属。维基百科The spider genus Steatoda, in the family Theridiidae, includes over 120 recognized species, distributed around the world (including many cosmopolitan species which are found among human populations worldwide).These usually dark spiders have in most species a white line around the anterior back, in addition to other lines or spots.Many spiders of the genus Steatoda are often mistaken for widow spiders (Latrodectus), and are known as false black widows; however Steatoda are significantly less harmful to humans. Steatoda are shaped similarly to widow spiders, with round, bulbous abdomens. However, not all Steatoda species resemble widows – many have distinct coloring, and are significantly smaller than Latrodectus specimens. Some species of Steatoda will actually prey on widows, as well as other spiders which are considered hazardous to humans.Some members of this genus do have bites which are medically significant in humans (such as S. grossa and S. n