The male has a long embolus and the female's sclerotized epigyne has a central pocket and wide copulatory openings.

Neaetha irreperta is a species of jumping spider that was first described by Wanda Wesołowska & Anthony Russell-Smith in 2000.

The genus is named for two Greek words, néos, which means new, and théa, which can be translated aspect.

[8] The subtribe is divided into harmochirines and pellenines, and the genus is allocated to the latter group, which is characterised by living on open sunny ground.

It is very hairy, with brown bristles along the back eye field and light grey hairs covering the remainder.

[3] The carapace has a thin black line along its edges and there are white scales on the eye field.

The wide copulatory openings lead to broad and curved seminal ducts and oval spermathecae.

[11] However, the colouration and width of the abdomen is distinctive, particularly compared to the otherwise similar Neaetha oculata.