''Calathotarsus'' is a genus of spiders in the family

Migidae Migidae, also known as tree trapdoor spiders, is a family of spiders with about 100 species in eleven genera. They are small to large spiders with little to no hair and build burrows with a trapdoor. Some species live in tree fern stems. They have ...

. It was first described in 1903 by

Eugène Simon Eugène Louis Simon (; 30 April 1848 – 17 November 1924) was a French naturalist who worked particularly on insects and spiders, but also on birds and plants. He is by far the most prolific spider taxonomist in history, describing over 4, ...

. , it contains 4 species, occurring in Chile and Argentina.

Species

References

Migidae Mygalomorphae genera Spiders of South America {{Mygalomorphae-stub