Roadless Areas
Home/Species/ Trinity Shoulderband

Helminthoglypta talmadgei

Roth, 1988

Trinity Shoulderband

G2Imperiled Found in 2 roadless areas NatureServe Explorer →
G2ImperiledGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.110605
Element CodeIMGASC2630
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryInvertebrate Animal
Endemicendemic to a single state or province
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 Method Rank calculation - Biotics v2
Review Date2024-02-05
Change Date2012-06-14
Edition Date2024-02-05
Edition AuthorsT. Cornelisse
Threat ImpactUnknown
Range Extent1000-5000 square km (about 400-2000 square miles)
Number of Occurrences6 - 80
Rank Reasons
This species has a moderate range but a limited number of viable occurrences and evidence of long-term population declines.
Range Extent Comments
This species occurs in Trinity and Humboldt Counties, California, USA (Roth 1987; Dunk et al. 2004).
Occurrences Comments
This species is known from at least approximately 8 current occurrences and 19 historical occurrences (Roth 1987; Dunk et al. 2004; CNDDB 2023).
Threat Impact Comments
Threats to this species are unknown, as it appears to be more tolerant of prescribed fire, drier conditions, and early successional forests (Dunk et al. 2004).
Ecology & Habitat

Habitat

This species is found in mix evergreen-hardwood forests and woodlands in riparian areas (Dunk et al. 2004).

Reproduction

This species is hermaphroditic (Roth 1987; Burke 2013).
Terrestrial Habitats
Forest - MixedWoodland - Conifer
Palustrine Habitats
Riparian
Other Nations (1)
United StatesN2
ProvinceRankNative
CaliforniaS2Yes
Threat Assessments
ThreatScopeSeverityTiming
Unknown/undetermined———

—

Roadless Areas (2)
California (2)
AreaForestAcres
ChanchelullaShasta-Trinity National Forest3,915
Fisher Gulch BShasta-Trinity National Forest4,791
References (6)
  1. Burke, T.E. 2013. Land snails and slugs of the Pacific Northwest. Oregon State University Press, Corvallis. 352 pp
  2. California Natural Diversity Database (CNDDB). 2023. Element Subnational Ranking Form in Biotics 5 database. NatureServe, Arlington, Virginia (accessed 2024).
  3. Dunk, J.R., W.J. Zielinski, and H.K. Preisler. 2004. Predicting the occurrence of rare mollusks in northern California forests. Ecological Applications, 14(3): 713-729.
  4. 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
  5. Roth, B. 1987. A new recent species of Helminthoglypta (Gastropoda: Pulmonata) from the Klamath Mountains, California, and redescription of the oligo-miocene species from Oregon. The Wasmann Journal of Biology. 45(1-2): 16-25.
  6. 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.