Calathotarsus

{{Short description|Genus of spiders}}

{{Italic title}}

{{Automatic taxobox| taxon=Calathotarsus| image=Calathotarsus simoni adult female.jpg|image_caption=Female C. simoni|authority=Simon{{cite web|title=Migidae| website=World Spider Catalog| publisher=Natural History Museum Bern| accessdate=2016-12-28 |url=http://www.wsc.nmbe.ch/genus/1925}}|subdivision_ranks = Species

|subdivision=

}}

Calathotarsus is a genus of spiders in the family Migidae. It was first described in 1903 by Eugène Simon. {{As of|2022}}, it contains 4 species, occurring in Chile and Argentina.