It is a cosmopolitan species found in many parts of the world, including North America, Australasia, and Europe.

Like black widows, the female S. grossa is 6-10.5 mm in length and dark colored with a round, bulbous abdomen.

According to Charles Hogue (Insects of the Los Angeles Basin, 1993), it reportedly preys on black widows.

[1] As is common with other members of the family Theridiidae, S. grossa constructs a cobweb, i.e. an irregular tangle of sticky silken fibers.

They are not aggressive, and most injuries to humans are due to defensive bites delivered when a spider gets unintentionally squeezed or pinched.

This spider is similar to S. grossa in shape, but slightly smaller, and is generally found in colder climates.