Tags: Arachnid.
Theridion attritum is a spider from Western Australia. While it was formerly placed in the families Araneidae and Theridiosomatidae’ in 1967 it was found to belong to the family Theridiidae and indeed to the genus Theridion. While all members of the first two families have a large colulus while T. attritum lacks one altogether. It is not to be confused with Anelosimus attritus which was for a time known as Theridion attritum.
