Oreohelix grahamensis
Gregg and W.B. Miller, 1974
Pinaleno Mountainsnail
G1Critically ImperiledGlobal Rank
Very high - mediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.110887
Element CodeIMGASB5120
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryInvertebrate Animal
Endemicendemic to a single state or province
KingdomAnimalia
PhylumMollusca
ClassGastropoda
OrderStylommatophora
FamilyOreohelicidae
GenusOreohelix
Concept ReferenceGregg, W.O. and W.B. Miller. 1974. Two new species of land snails from the Pinaleno Mountains, Arizona. Bulletin of Southern California Academy of Sciences 73(3): 146-151.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2020-09-15
Change Date2020-09-15
Edition Date2020-09-15
Edition AuthorsFlower, C.
Threat ImpactVery high - medium
Range Extent<100 square km (less than about 40 square miles)
Number of Occurrences6 - 20
Rank ReasonsOreohelix grahamensis has a limited distribution in the Pinaleno Mountains on Arizona. There are mostly historical occurrences, but more recent surveying has found shells at Wet Canyon and Twilight Canyon. Fire is the main threat, followed by ash flow from monsoon rain events. There is limited information on population status or trends and a more thorough threat assessment is needed.
Range Extent CommentsThis species is endemic to the Pinaleño Mountains, Arizona, USA.
Occurrences CommentsThis species is found throughout the Pinaleno Mountains. Records from historical and more recent surveys have recorded the species at Wet Canyon and Twilight Canyon.
Threat Impact CommentsFire is the main threat, followed by ash flow from monsoon rain events.
Ecology & Habitat
Habitat
This species is normally not found within the talus and does not seem to seal to the rocks; but is found in the leaf litter within and around the talus. Elevation has been found to be between 6,590-10,080ft (2,009-3,072m).
Terrestrial HabitatsForest - Mixed
Other Nations (1)
United StatesN1
| Province | Rank | Native |
|---|
| Arizona | S1 | Yes |
Roadless Areas (1)
Arizona (1)
| Area | Forest | Acres |
|---|
| Pinaleno | Coronado National Forest | 130,920 |
References (2)
- Gregg, W.O. and W.B. Miller. 1974. Two new species of land snails from the Pinaleno Mountains, Arizona. Bulletin of Southern California Academy of Sciences 73(3): 146-151.
- Turgeon, D. D., J. F. Quinn, Jr., A. E. Bogan, E. V. Coan, F. G. Hochberg, W. G. Lyons, P. M. Mikkelsen, R. J. Neves, C. F. E. Roper, G. Rosenberg, B. Roth, A. Scheltema, F. G. Thompson, M. Vecchione, and J. D. Williams. 1998. Common and scientific names of aquatic invertebrates from the United States and Canada: Mollusks. 2nd Edition. American Fisheries Society Special Publication 26, Bethesda, Maryland. 526 pp.