Missulena insignis, commonly known as the lesser red-headed mouse spider, is a species of spider belonging to the family Actinopodidae native to Australia.

Separately, William Joseph Rainbow described a male collected from Menindie, New South Wales as Actinopus formosus in 1896,[3] formosus being Latin for "handsome/beautiful".

H. Womersley in 1943 regarded Actinopus formosus as a synonym of Missulena occatoria.

[4] Barbara York Main in 1985 treated Actinopus formosus as a synonym of Missulena insignis,[5] the position adopted by the World Spider Catalog.

[5] According to Framenau et al., M. occatoria and M. insignis cannot be differentiated based on the original description.