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Sonorella anchana

S.S. Berry, 1948

Sierra Ancha Talussnail

G1Critically Imperiled (G1G2) Found in 1 roadless area NatureServe Explorer →
G1Critically ImperiledGlobal Rank
Very high - mediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.116529
Element CodeIMGASC9030
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryInvertebrate Animal
Endemicendemic to a single state or province
KingdomAnimalia
PhylumMollusca
ClassGastropoda
OrderStylommatophora
FamilyHelminthoglyptidae
GenusSonorella
Concept Reference
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.
Conservation Status
Rank MethodLegacy Rank calculation - Excel v3.1x
Review Date2018-12-15
Change Date2018-12-15
Edition Date2018-12-15
Edition AuthorsCordeiro, J.R.
Threat ImpactVery high - medium
Range Extent<100 square km (less than about 40 square miles)
Number of Occurrences1 - 5
Rank Reasons
This is a narrowly distributed with small occupied habitat in Arizona. Decline has not been documented although current surveys are necessary. Live specimens were located in 2017 in three nearby areas in very close proximity within the current known range.
Range Extent Comments
This species is native to a very small section of the Sierra Ancha, Reynolds Creek, in Gila County, Arizona (Bequaert and Miller, 1973).
Occurrences Comments
In 2017 live specimens were located within its current narrow footprint on the southwest side of Center Mountain near Reynolds Creek in the Sierra Ancha Mountains, Tonto National Forest, Gila County, Arizona (iNaturalist, 2018).
Threat Impact Comments
The species is known only from a very small area with a history of mining and road construction.
Ecology & Habitat

Habitat

This species occurs on limiestone rockslides at medium to high altitude in the Sierra Ancha, Gila Co., AZ (Bequaert and Miller, 1973).
Terrestrial Habitats
Shrubland/chaparralBare rock/talus/scree
Other Nations (1)
United StatesN1
ProvinceRankNative
ArizonaS1Yes
Threat Assessments
ThreatScopeSeverityTiming
3 - Energy production & miningLarge (31-70%)Extreme - moderateHigh (continuing)
3.2 - Mining & quarryingLarge (31-70%)Extreme - moderateHigh (continuing)
4 - Transportation & service corridorsLarge (31-70%)Extreme - moderateHigh (continuing)
4.1 - Roads & railroadsLarge (31-70%)Extreme - moderateHigh (continuing)

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Roadless Areas (1)
Arizona (1)
AreaForestAcres
Cherry CreekTonto National Forest11,371
References (4)
  1. Bequaert, J.C. and W.B. Miller. 1973. The mollusks of the arid southwest with an Arizona checklist. University of Arizona Press: Tucson, Arizona. 271 pp.
  2. Berry, S.S. 1948. Snails of Sierra Ancha, Arizona. The American Midland Naturalist 39(1):151-159.
  3. Gregg, W.O., and W.B. Miller. 1969. A New <i>Sonorella </i>from Phoenix, Arizona. The Nautilus 82(3):90-93.
  4. 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.