Fontes da lista: Sampaio & Ferreira-Jr. 2014. A new species of Iapir Py-Daniel, Fonseca & Barbosa (Coleoptera: Myxophaga: Torridincolidae) from Brazil with key to species of the genus. Zootaxa 3753 (2): 196–200. Reichardt, H. 1973. A critical study of the suborder Myxophaga, with a taxonomic revision of the Brazilian Torridincolidae and Hydroscaphidae (Coleoptera). Arquivos de Zoologia, 24(2):73-162.
Iapir britskii (Reichardt & Costa, 1967) Iapir vanini Sampaio & Ferreira-Jr, 2004 Ytu artemis Reichardt, 1973 Ytu demeter Reichardt, 1973 Ytu hephaestus Reichardt, 1973 Ytu phebo Reichardt, 1973