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Steatoda grossa - female. Steatoda grossa with its dark, shiny, globular body is the most Black Widow-like of our false widdow spiders and it is common in dark corners of houses and outbuildingsin southern Britain. The young female spiders have clear pale forward-pointing chevrons on the dark abdomen which fade as they get larger but are usually still just visible. The spider can deliver a nip but does not have the reputation for causing pain as has Steatoda nobilis.