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Home/Species/ Klamath Sideband

Monadenia churchi

Hanna and A.G. Smith, 1933

Klamath Sideband

G3Vulnerable Found in 4 roadless areas NatureServe Explorer →
G3VulnerableGlobal Rank
MediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.109819
Element CodeIMGASC7010
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryInvertebrate Animal
Endemicendemic to a single nation
KingdomAnimalia
PhylumMollusca
ClassGastropoda
OrderStylommatophora
FamilyBradybaenidae
GenusMonadenia
Concept Reference
Hanna, G. D., and A. G. Smith. 1933. Two new species of Monadenia from northern California. The Nautilus, 46(3):79–86.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-01-30
Change Date2024-01-30
Edition Date2024-01-30
Edition AuthorsT. Cornelisse
Threat ImpactMedium
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences21 - 80
Rank Reasons
This species has a moderate range and number of occurrences, and although population trends are unknown, it is at risk due to climate change and habitat degradation.
Range Extent Comments
This species occurs in several Trinity, east Shasta, Tehama, and Lassen Counties, and into northern Butte County, California, USA (Dunk et al. 2004; Burke 2013; Sullivan 2023; CNDDB 2023; GBIF 2024).
Occurrences Comments
This species is known from at least 24 occurrences, but there are likely many more, as the distribution of known locations within watersheds and generalist habitat associations suggest additional occurrences and potentially into adjacent watersheds (Dunk et al. 2004; Sullivan 2023; CNDDB 2023).
Threat Impact Comments
Specific threats to this species are not known, but, land snails generally and subspecies of related genera specifically are more susceptible to desiccation than aquatic species; thus, activities or events that change the microclimate they inhabit, like fire, road construction and maintenance, and the effects of climate change, likely threaten this taxon (Burke et al. 1999; Burke et al. 2013).
Ecology & Habitat

Habitat

This species is found mostly in limestone outcrops, caves, talus slides, and lava rockslides, but also occurs under forest debris in heavy shade on wooded hillsides (Dunk et al. 2004; CNDDB 2023).

Reproduction

This species is hermaphroditic (Burke 2013).
Terrestrial Habitats
Forest/WoodlandBare rock/talus/scree
Other Nations (1)
United StatesN3
ProvinceRankNative
CaliforniaS3Yes
Threat Assessments
ThreatScopeSeverityTiming
4 - Transportation & service corridorsRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)
4.1 - Roads & railroadsRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)
7 - Natural system modificationsRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)
7.1 - Fire & fire suppressionRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)
7.1.1 - Increase in fire frequency/intensityRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)
11 - Climate change & severe weatherPervasive (71-100%)Moderate or 11-30% pop. declineHigh (continuing)
11.2 - DroughtsPervasive (71-100%)Moderate or 11-30% pop. declineHigh (continuing)

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Roadless Areas (4)
California (4)
AreaForestAcres
Butt Mtn.Lassen National Forest8,217
Cub CreekLassen National Forest8,643
East GirardShasta-Trinity National Forest27,894
PattisonShasta-Trinity National Forest29,299
References (9)
  1. Burke, T.E. 2013. Land snails and slugs of the Pacific Northwest. Oregon State University Press, Corvallis. 352 pp
  2. Burke, T.E., J.S. Applegarth, and T.R. Weasma. 1999. Management recommendations for survey and manage terrestrial mollusks. Ver. 2.0. Report submitted to USDI Bureau of Land Management, Salem, Oregon, October 1999. Unpaginated.
  3. California Natural Diversity Database (CNDDB). 2023. Element Subnational Ranking Form in Biotics 5 database. NatureServe, Arlington, Virginia (accessed 2024).
  4. 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.
  5. Frest, T.J. and E.J. Johannes. 2000b. A baseline mollusk survey of southwestern Oregon, with emphasis on the Rogue and Umpqua River drainages. Report for the Oregon Natural Heritage Program, Portland, Oregon. Deixis Consultants, Seattle, Washington. 403 pp.
  6. Global Biodiversity Information Facility (GBIF). 2024. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2024).
  7. Hanna, G. D., and A. G. Smith. 1933. Two new species of <i>Monadenia </i>from northern California. The Nautilus, 46(3):79–86.
  8. Sullivan, R. M. 2023. Spatial relationships and mesoscale habitat variance in co-occurring populations of Church’s sideband and Trinity bristle snail in the Greater Trinity Basin, northern California. California Fish and Wildlife Scientific Journal 109 (3): 24 pp. www.doi.org/10.51492/cfwj.109.13
  9. 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.