Over the course of the intervening years during which a number of Treatise Online chapters on podotrematous crabs were published, new knowledge has accumulated and reclassifi cations and new taxa have been recognized within the the podotrematous sections. The following are changes in classification and generic and family additions covering 2012 to December 2022 for the sections Homoloida, Dakoticancroida, Cyclodorippoida, and Raninoida. They are updates to the following systematic descriptions chapters: Treatise Online 52, 96, 97, and 113. They will be listed sepa rately at the beginning of References, p. 7.