Steatoda bipunctata  (THERIDIIDAE)

This is one of the so-called "false widow" spiders, though significantly smaller than the "noble false widow" Steatoda nobilis. It is similar in appearance and habitat to its larger cousin, but its body size (in females) is up to about 7 mm, compared to 14 mm for Steatoda nobilis. Also, it has a less defined patern on its abdomen, although the white horseshoe motif is still present. The features in the micrographs should be compared with those of Steatoda nobilis and Steatoda grossa. The image is of a preserved specimen of a male, showing its characteristic pedipalps as well as the horseshoe band on its abdomen.

Head and chelicerae of Steatoda bipunctata The bottom end of the chelicerae of Steatoda bipunctata Left Pedipalp (male sexual organ) of Steatoda bipunctata

Epigyne (female sexual organ) of Steatoda bipunctata. Note the blockage in the left hand opening, which could be the broken off embolus from a male pedipalp. Spinnerets of Steatoda bipunctata Tarsal claw of Steatoda bipunctata