Mecysmaucheniidae is a family of araneomorph spiders first described by Eugène Simon in 1895.[1] Most genera occur in South America (Chile and Argentina), with two genera endemic to New Zealand.
See main article: List of Mecysmaucheniidae species., the World Spider Catalog accepts the following genera:[2]
Grismado. CJ. Ramírez. MJ. 2005. Nuevas especies de la familia Mecysmaucheniidae (Araneae) de Chile y Argentina (Spanish, with pictures) (Mecysmauchenius platnicki). Biota Neotropica. 5. 1–4. 10.1590/S1676-06032005000200017. free. Web site: Mecysmaucheniid spiders strike prey with lightning speed, scientists find. April 10, 2016. April 8, 2016. Sci-News.com.