Semysmauchenius

{{short description|Monotypic genus of spiders}}

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{{Speciesbox

| taxon=Semysmauchenius antillanca

| authority=Forster & Platnick, 1984

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Semysmauchenius is a genus of spiders in the Mecysmaucheniidae family. It was first described in 1984 by Forster & Platnick. {{As of|2017}}, it contains only one Chilean species, Semysmauchenius antillanca.{{cite web|title=Mecysmaucheniidae| website=World Spider Catalog| publisher=Natural History Museum Bern| accessdate=2017-03-27| url=http://www.wsc.nmbe.ch/genus/1897}}