''Semysmauchenius'' is a genus of spiders in the

Mecysmaucheniidae Mecysmaucheniidae is a family of araneomorph spiders first described by Eugène Simon in 1895. Most genera occur in South America (Chile and Argentina), with two genera endemic to New Zealand New Zealand () is an island country in the ...

family. It was first described in 1984 by Forster & Platnick. , it contains only one Chilean species, ''Semysmauchenius antillanca''.

References

Mecysmaucheniidae Monotypic Araneomorphae genera Spiders of South America Endemic fauna of Chile {{Araneomorphae-stub