Although similar to the related Phintella lucida, the copulatory organs are distinctive.

[4] The species name is the Latin for spherical, and relates to the shape of the spermathecae.

[6] There are similarities between spiders within genus Phintella and those in Chira, Chrysilla, Euophrys, Icius, Jotus and Telamonia.

[7] Genetic analysis confirms that it is related to the genera Helvetia and Menemerus and is classified in the tribe Chrysillini, named after the genus Chrysilla.

[8][9] In 2017, Jerzy Prószyński grouped the genus with 32 other genera of jumping spiders under the name Chrysillines in the supergroup Chrysilloida.

It has a dark brown sloping carapace marked by a wide belt of white hairs towards the back and a black eye field.

[11] Superficially, the copulatory organs are similar to the related Phintella lucida but the seminal ducts are thinner and the spermathecae are much larger.