[1] Uroballus carlei has been described from one male, which was collected in 2018 from a railing at the edge of Shek O Country Park, Hong Kong.

The species is named after American illustrator Eric Carle of The Very Hungry Caterpillar, at the occasion of his 90th birthday, the 50th anniversary of his most famous book, and to honor his contribution to early childhood nature education.

[1] Like other species of this genus, U. carlei has unusually long spinnerets, and a flat and broadened carapace.

[1] The female (probably immature) is only known from pictures in the book A Guide to the Spiders of Hong Kong (2016) by Dickson Wong.

It rarely jumps, and might escape by falling down on a thread of several centimeters, then climbing back up.