The female has a distinctive sclerotized epigyne that helps distinguish the spider from other members of the genus.

Phintella incerta is a jumping spider that was first identified in 2008 by Wanda Wesołowska and Anthony Russel-Smith.

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

[6] Genetic analysis confirms that it is related to the genera Helvetia and Menemerus and is classified in the tribe Chrysillini.

[7][8] The spider was described based on a specimen found as part of a survey of invertebrates that was undertaken between November 1994 and January 1995.

[1] The species differs from other members of the genus by the design of the epigyne, which is oval with pronounced sclerite.