[1] Many species in this genus used to reside in Achaearanea,[1] which received a major revision in 2008 by Hajime Yoshida.

[2] The genus was originally established as a subgenus of Theridion.

[1][2] This is mostly a New World genus, with many species in South America.

[1] C. veruculata was introduced to Europe from New Zealand.

The genus is called Iwama-himegumo zoku in Japanese.