He based the name on illustrations he had seen in a work still in preparation and so not then published, namely a section on spiders by Hercule Nicolet in the multivolume Historia física y política de Chile.

In his earlier publication, Walckenaer had argued that Thomisoides was inappropriate as a genus name, as the species was not related to Thomisus, a crab spider.

[2] It can grow between 12 and 20 mm in length, lives in desert areas of northern and central Chile and has nocturnal habits, building shelters under rocks on sandy substrate in northern Chile, it is extremely common in urban regions with a lot of household waste.

[3] A recent study showed that the species S. thomisoides has active sphingomyelinase D, which has effects and intensity similar to that of the dangerous Chilean recluse spider (Loxosceles laeta).

Therefore, like Sicarius ornatus and Loxosceles laeta, S. thomisoides fulfils the toxic parameters to cause damage in humans.