Ancylotrypa brevicornis, commonly known as the Venterskroon wafer-lid trapdoor spider, is a species of spider of the genus Ancylotrypa. It is endemic to South Africa.
Ancylotrypa brevicornis is known from three South African provinces: Gauteng, Limpopo, and North West. Type locality is Venterskroon in North West Province. The species occurs at elevations between 1120 and 1628 meters above sea level.
This species is a free-living ground dweller that lives in silk-lined burrows. In addition to constructing a thin wafer-lid trapdoor, these spiders use a hard, spherical plug made of soil particles held together by silk to close the burrow entrance. The species has been sampled from both Grassland and Savanna biomes.
Both males and females have been described for this species.
Listed as Least Concern on the South African Red List. The species is protected in Nylsvley Nature Reserve, where burrow-constructing behavior has been studied.