Wafer-lid spiders are generally large and range in color between light brown and black.

[4] They lack the thornlike spines on tarsi and metatarsi I and II (the two outermost leg segments) found in true trapdoor spiders (Ctenizidae).

A currently undescribed genus in the western United States may hold an altitude record for the family, being found up to over 11,000 feet (3,400 meters).

Angka is endemic to the cloud forest of Doi Inthanon, Thailand.

The former subfamily Euctenizinae from the US and Mexico were promoted to family rank as Euctenizidae in 2012, and are now considered more closely related to Idiopidae.