Mesarchaea

{{Short description|Genus of spiders}}

{{Italic title}}

{{Speciesbox

| taxon=Mesarchaea bellavista

| authority=Forster & Platnick, 1984

}}

Mesarchaea 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 species, Mesarchaea bellavista, found in Chile.{{cite web|title=Mecysmaucheniidae| website=World Spider Catalog| publisher=Natural History Museum Bern| access-date=2017-03-27| url=http://www.wsc.nmbe.ch/genus/1896}}