Similar to other species in the genus, it mimics ants and ant-like wasps, living alongside and preying upon them.

Mexcala torquata is a jumping spider that was first described by the Polish arachnologist Wanda Wesołowska in 2009, one of over 500 species she identified during her career.

[2][3] The genus was a member of the tribe Heliophaninae alongside Pseudicius and Cosmophasis, which was absorbed into Chrysillini by Wayne Maddison in 2015.

[7] The species itself has a name that is based on the Latin word meaning with fillet and refers to the pattern on the female abdomen.

It is elongated in shape, narrower to the rear, with sparse dark hairs on the back and long brown bristles on the front edge.

The tibial apophysis, or spike, is very thin and the embolus is very small and reminiscent of a tiny spine.

The chelicerae have a similar single small tooth at the back and serrated front to the male and the maxilla is thin, black with a whitish edge.

The abdomen is between 3.6 and 3.7 mm (0.14 and 0.15 in) long and dark brown with a black fillet half way down its length.

The long legs are dark brown, although the front two are lighter and have a pattern of black lines that cross them like belts.

[18] The chelicerae have short thick spines on them that may be used for digging holes to act as underground hiding places.

[19] It uses visual displays during courtship and transmits vibratory signals through silk to communicate to other spiders.