It was first described in 2018 by Dmitri Logunov and Galina Azarkina from a holotype specimen found by a collector named Siyam in the Dinder National Park.

It is similar to Stenaelurillus sudanicus also found in the country but can be distinguished by the design of the epigyne, which is oval, its widely separated facing copulatory openings, and long, S-shaped insemination ducts.

The spinnerets are similarly brown-yellow while the pedipalps are yellow with white hairs and brown bristles.

The epigyne is flat and round with large oval copulatory openings and a deep wide pocket.

Stenaelurillus siyamae has widely separated and facing copulatory openings, and longer, S-shaped insemination ducts than the other species.

[6] Logunov and Azarkina thought that the male of the species could be one of those currently identified as Stenaelurillus strandi.