16, see text Badumna is a genus of intertidal spiders that was first described by Tamerlan Thorell in 1890.

[5] They are harmless spiders that can be found around human structures and buildings.

[7] Most of the species are considered to be endemic in the Indo-Australian region, but some have been introduced elsewhere.

B. longinqua is the only species introduced to North America, now found in urban areas along California's Pacific coast.

[8] B. insignis has also been found in Japan, though it is thought it was introduced.