Requested reference
Godwin, R. L. & Bond, J. E. (2021). Taxonomic revision of the New World members of the trapdoor spider genus Ummidia Thorell (Araneae, Mygalomorphae, Halonoproctidae). ZooKeys 1027: 1-65. doi:10.3897/zookeys.1027.54888 -- Show included taxa