No strictly Utah-endemic species found
Define the rule up front: list only species whose entire global range sits inside Utah’s state lines. Under that strict rule, no species qualify. State borders are human lines. Plants and animals live by habitat, not political maps.
Explain why this produces no results. Utah sits inside larger ecoregions (Great Basin, Colorado Plateau, Bonneville Basin) that cross into Nevada, Arizona, Colorado, Idaho and Wyoming. Many species tied to those habitats range across state borders. Taxonomy and survey work also blur the picture: some populations are called distinct subspecies, not full species, or recent studies change how ranges are mapped. Use authoritative databases (NatureServe, Utah DWR, USFWS) and you will find very few, if any, species listed as only in Utah.
Consider close alternatives. Look for near-endemics and local endemics instead. Examples often cited include the Utah prairie dog (mostly in southwestern Utah) and the Bonneville cutthroat trout (tied to the Bonneville Basin). Also explore species that are endemic to ecoregions that include Utah, such as Great Basin endemics, Colorado Plateau endemics, or freshwater spring snails that live in single basins or springs.
Explore these lists instead: Utah native species, Utah state threatened and endangered species, Great Basin and Colorado Plateau endemics, and drainage- or spring-level endemics. Use NatureServe, Utah Division of Wildlife Resources, and the U.S. Fish & Wildlife Service for authoritative range maps and conservation status.
