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Helminthoglypta hertleini

Hanna and A.G. Smith, 1937

Oregon Shoulderband

G3Vulnerable (G3Q) Found in 2 roadless areas NatureServe Explorer →
G3VulnerableGlobal Rank
HighThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.108150
Element CodeIMGASC2280
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryInvertebrate Animal
Endemicendemic to a single nation
KingdomAnimalia
PhylumMollusca
ClassGastropoda
OrderStylommatophora
FamilyHelminthoglyptidae
GenusHelminthoglypta
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 - Biotics v1
Review Date2019-08-08
Change Date2019-08-08
Edition Date2019-07-31
Edition AuthorsGaines, Eleanor
Threat ImpactHigh
Range Extent20,000-200,000 square km (about 8000-80,000 square miles)
Number of Occurrences21 - 80
Rank Reasons
The known range is relatively small, but there are many occurrences within that range. The threat level is high, largely because of the species' specific habitat needs and low mobility.
Range Extent Comments
This species is known from near Sutherlin, Oregon, south to Redding, California, USA. Records are known from Jackson, Josephine, Douglas Counties in Oregon and Shasta County in California. There is also one disjunct 2016 record from eastern Humboldt Co, California. Specimens from Douglas Co, Oregon, may be a new, undescribed species (Barry Roth pers. comm., 2019). This would restrict the estimated range of H. hertleini to 20,000 sq km, but would not change the range extent rating.
Occurrences Comments
2019: 64 known occurrences; 15 from California, 49 from Oregon. There are 5 additional Oregon records that have not been digitized.
Threat Impact Comments
This species is vulnerable to habitat loss and fragmentation due to roads, mining, quarry development, fire and fire management, timber harvest, and recreation (Frest and Johannes 1999, Burke 2013, Foltz Jordan and Black 2012, 2015). In particular, this species is vulnerable to activities that increase microsite temperature or decrease moisture. Relatively low mobility increases the impact of environmental disturbance.
Ecology & Habitat

Habitat

This species is associated with rocky and woody debris in open forested habitat, often near seasonal herbaceous vegetation (Burke 2013, Foltz Jordan and Black 2015). Talus and rocky outcrops provide seasonal refugia.
Terrestrial Habitats
Forest/WoodlandWoodland - HardwoodWoodland - ConiferWoodland - MixedGrassland/herbaceous
Other Nations (1)
United StatesN1
ProvinceRankNative
OregonS2Yes
CaliforniaS1Yes
Threat Assessments
ThreatScopeSeverityTiming
3 - Energy production & miningSmall (1-10%)Moderate or 11-30% pop. decline—
3.2 - Mining & quarryingSmall (1-10%)Moderate or 11-30% pop. decline—
4 - Transportation & service corridorsLarge (31-70%)Moderate or 11-30% pop. decline—
4.1 - Roads & railroadsLarge (31-70%)Moderate or 11-30% pop. decline—
5 - Biological resource useRestricted (11-30%)Moderate or 11-30% pop. decline—
5.3 - Logging & wood harvestingRestricted (11-30%)Moderate or 11-30% pop. decline—
6 - Human intrusions & disturbanceRestricted (11-30%)Slight or 1-10% pop. decline—
6.1 - Recreational activitiesRestricted (11-30%)Slight or 1-10% pop. decline—
7 - Natural system modificationsRestricted (11-30%)Moderate or 11-30% pop. decline—
7.1 - Fire & fire suppressionRestricted (11-30%)Moderate or 11-30% pop. decline—

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Roadless Areas (2)
California (2)
AreaForestAcres
Devils RockShasta-Trinity National Forest16,209
Orleans Mtn. BSix Rivers National Forest17,183
References (7)
  1. Burke, T.E. 2013. Land snails and slugs of the Pacific Northwest. Oregon State University Press, Corvallis. 352 pp
  2. Foltz Jordan, S and S. Hoffman Black. 2012. Effects of forest land management on terrestrial mollusks: A literature review. Report from Xerces Society to Interagency Special Status and Sensitive Specvies Program, USDA Forest Service, Region 6 and USDI Oregon/Washington Bureau of Land Management. 87 pp. Unpublished. Downloaded from http://www.xerces.org/wp-content/uploads/2012/04/forest-land-management-and-mollusks.pdf on 16 November 2017.
  3. Foltz-Jordan, S. and S. Hoffman Black. 2015. Conservation Assessment for <i>Helminthoglypta hertleini</i>, Oregon Shoulderband. USDA Forest Service Region 6 and USDI Bureau of Land Management, Oregon and Washington Interagency Special Status and Sensitive Species Program. 23 pp. Available at: https://www.fs.fed.us/r6/sfpnw/issssp/documents3/ca-ig-helminthoglypta-hertleini-201504-508.pdf
  4. Frest, Terry. Deixis Consultants. Seattle, Washington
  5. Frest, T.J. and E.J. Johannes. 1999a. Mollusk survey of southwestern Oregon, with emphasis on the Rogue and Umpqua River drainages. Report prepared for the Oregon Natural Heritage Program, 821 SE 14th, Portland, Oregon 97214:278 pp. + appendices.
  6. Gaines, E. Zoology Data Manager, Oregon Natural Heritage Program, Oregon Field Office, Portland, Oregon. Pers. comm.
  7. 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.