Euophrys falciger is a species of jumping spider that was first described by Wanda Wesołowska Galina Azarkina and Anthony Russell-Smith in 2014.

[3] It was one of over 500 species identified by the Polish arachnologist Wesołowska during her career, more than any other contemporary writer and second only to the French archnologist Eugène Simon.

[5] The species is named for a Latin word that can be translated "sickle" and recalls the shape of the male spider's embolus.

[1] In Wayne Maddison's 2015 study of spider phylogenetic classification, the genus Euophrys was listed to the tribe Euophryini.

[13] Euophrys falciger is a small spider with a body divided into two main parts: a larger rectangular cephalothorax and a smaller oval abdomen.

The carapace, the hard upper part of the cephalothorax, is dark brown and covered in colourless and grey hairs.

The top is black and covered in a brown hairs with a pattern light patches on the surface and a small number of chevrons towards the back.

These lead via simple insemination ducts, terminating in a knot, into rounded spermathecae, which have accessory glands attached to their sides.

[16] The male has a hairy cymbium and lumpy palpal bulb, which has a short embolus attached to the top that is shaped like a sickle.

Compared to the related Euophrys difficilis, the male has a smaller lobe at the end of its palpal bulb and a longer tibial apophysis.

[15] Compared to the related Euophrys meridionalis, the spider is smaller, while the male has a longer embolus and the female narrower insemination ducts.