Louisella is a genus of worm known from the Middle Cambrian Burgess Shale.

[2] 48 specimens of Louisella are known from the Greater Phyllopod bed, where they comprise < 0.1% of the community.

[3] It has been stated to have palaeoscolecid-like sclerites,[4] though this is not in fact the case.

[5] It's also been interpreted as an annelid [6] and a sipunculan,[7] (neither on particularly compelling grounds) and a pripaulid,[8] but it is more conservatively considered to represent an ecdysozoan worm;[5] deep ecdysozoan relationships are not yet well resolved, making a more precise affiliation challenging.

This article related to a Cambrian animal is a stub.