MacMillan (1946) and Pilsbry (1948) have referred Utah specimens of this species to the race Gastrocopta pellucida parvidens.
Status in Utah
This species is known from a single (historical) locality in the extreme east-central part of the state (south-central Grand County) (MacMillan 1946, Pilsbry 1948).
The single reported collection of this species in Utah was of 5 specimens (MacMillan 1946); however, the report of this collection did not specify whether any of the 5 individuals were alive when collected or even whether any of the specimens were fresh shells.
Threats to this species in Utah are not known but may be few. Destruction of riparian habitat in the arid part of Utah where the species has been found is likely its greatest threat in this state. Population trend in this species in Utah is unknown.
Inventory is needed both at the single historically reported Utah locality in Arches National Park, Grand County, and elsewhere in eastern and southern Utah.
Like other members of its family (Pupillidae), this species is small, inconspicuous, difficult to identify, and easily overlooked. As a result, its seeming rarity in Utah may be the product of inadequate sampling effort.
Habitats Utilized in Utah
MacMillan (1946) described the habitat at only known locality for this species in Utah: "... natural springs have created a small stream that flows for a mile through a narrow, winding, rocky canyon before it gradually disappears in the sandy soil comprising most of the floor of the wash. In the more sheltered parts are found small clumps of willows, and a thick carpet of grass forms the floor of these growths, together with twigs, willow leaves, and a few rocks."