Oreohelices of Utah, II. Extant status of the Brian Head mountainsnail, Oreohelix parawanensis Gregg, 1941 (Stylommatophora: Oreohelicidae)

The Brian Head mountainsnail, Oreohelix parawanensis , is reported for the 1st time as a living species, and for the 1st time its habitat is described. Preliminary determination of the very limited distribution of this species (≤ 2.3 ha inhabited in ～ 11 ha overall area) is presented. Morphometric data previously had been reported only for the holotype and for 1 topotype; measurements from 37 new specimens as well as 20 paratypes are provided here, and these data show that the lost holotype was not typical of the species. Sizes of reproductive snails and of embryos are also reported.