Emerton's Bitubercled Cobweaver - Theridula emertoni

"Theridula emertoni" is a species of tangle web spider commonly found in the United States and Canada. Prior to its formal description in 1954, specimens of "T. emertoni" were often classified as "T. opulenta", a species with whom its range overlaps. The species can be reliably distinguished from "T. opulenta" by the epigyne in females or by the pedipalp in males.