First described in 2020 by Barbara Patoleta & Marek Żabka, the spider is named for the Polish arachnologist Wanda Wesołowska.

Its epigyne has ovoid, rather than crescent-shaped, copulatory openings and spermathecae that are separated rather than lying together.

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

[4] This confusion spreads to the genus, as Neaetha spiders are externally similar to other genera, including Bianor, Harmochirus.

[6] A DNA analysis study undertaken by Wayne Maddison and Marshall Hedin identified that the genus is most closely related to the g|enus Salticus.

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

[6] Neaetha wesolowskae is a small spider with a body divided into two main parts: a broad cephalothorax and an oval abdomen.

The carapace is brown and covered in white scales with a distinct fovea, or depression, in its middle.

The palpal tibia has a long narrowing projection, or tibial apophysis, that has a pointed and slightly bent tip.

The palpal bulb has an ovoid tegulum with a straight sperm duct and a crescent-shaped embolus.

[11] The spider is particular similar to Neaetha tomkovichi, differing in the having a larger pocket on the epigyne and the way that the spermathecae are separated rather than together.