New cave japygids (Diplura: Japygidae) from North America

We studied a significant collection of Japygidae (Diplura) deposited in the Texas A&M University Insect Collection, sampled from several caves in North America, mostly in the early 21st century by a group of American speleologists. Among this biological material, a new genus and species, Quapawjapyx osage Sendra gen. et sp. nov., is described from four caves in Arkansas, and a new species, Holjapyx nimiipuu Sendra sp. nov., from five caves in Idaho; both are named in honor of native American tribes. Quapawjapyx osage can be distinguished from Indjapyx, Paurojapyx, and Parindjapyx – which share symmetrical cerci – by the combination of the shape and disposition of the glandular and sensory setae on the first urosternite, together with differences in cercal ornamentation. Holjapyx nimiipuu is characterized by the presence of two conspicuously large predental denticles on the right cercus. Both new taxa of cavernicolous japygids show slight cave-adaptation features, such as large body size, slight elongated appendages, and a small increase in the placoid sensilla of last antennomere. These two new taxa double the number of known cave-adapted japygids in North America, a seemingly low figure that is nonetheless comparable to other karst regions worldwide.