Juga canella
Strong, Garner, Johnson and Whelan, 2022
Cinnamon Juga
G1Critically ImperiledGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.866903
Element CodeIMGASK4230
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryInvertebrate Animal
Endemicendemic to a single state or province
KingdomAnimalia
PhylumMollusca
ClassGastropoda
OrderCaenogastropoda
FamilySemisulcospiridae
GenusJuga
Concept ReferenceStrong, E.E., J.T. Garner, P.D. Johnson, and N.V. Whelan. 2022. A systematic revision of the genus Juga from fresh waters of the Pacific Northwest, USA (Cerithioidea, Semisulcospiridae). European Journal of Taxonomy 848: 1-97. Online: https://doi.org/10.5852/ejt.2022.848.1993
Taxonomic CommentsA systematic revision of the genus Juga found that almost all species previously considered valid were para- or polyphyletic grades of organization in shell morphology. Most species previously suggested to be putatively new were confirmed to be morphological variants of species already described (Strong and Whelan 2019, Strong et al. 2022). Based on this analysis, Strong and Whelan (2022) confirmed the validity of Cinnamon Juga (formerly Juga sp. 10 in this database) as a distinct species and formally described it as J. canella.
Conservation Status
Review Date2011-10-26
Change Date2011-10-26
Edition Date2011-10-26
Edition AuthorsCordeiro, J. (2011)
Threat ImpactUnknown
Number of Occurrences1 - 5
Range Extent CommentsThis species occurs in northern California in the Shasta River drainages and adjacent parts of the upper Sacramento River drainage in Siskiyou and Shasta Counties and in south-central Oregon in the upper Klamath River drainages in Jackson County, USA (Strong et al. 2022).
Occurrences CommentsFrest and Johannes (1999) include eight sites mostly in a large spring complex (nasmode) along the central upper Sacramento River, Siskiyou Co., California; with one rare occurrence in the river itself.
Threat Impact CommentsLocalities are very near to Southern Pacific Railroad tracks (Frest and Johannes, 1999) making range expansion difficult, at best. This species may be extirpated from the southern part of the range in the Sacramento River drainage due to the Cantara Loop chemical spill in 1991 (Frest and Johannes 1993, 2005 in Strong et al. 2022).
Ecology & Habitat
Habitat
This species is found primarily in springs, spring runs, and spring-fed creeks. Some populations were found in subaqueous springs in the main stem of the Sacramento River, but these populations have likely been extirpated (Frest and Johannes 1999, Strong et al. 2022).
Other Nations (1)
United StatesN1
| Province | Rank | Native |
|---|
| Oregon | S1 | Yes |
| California | SNR | Yes |
Roadless Areas (1)
California (1)
| Area | Forest | Acres |
|---|
| Mt. Shasta B | Shasta-Trinity National Forest | 2,809 |
References (8)
- Frest, T.J., and E.J. Johannes. 1993. Mollusc Species of Special Concern within the Range of the Northern Spotted Owl. Deixis Consultants, Final Report. Unpublished report prepared for the Forest Ecosystem Management Working Group, U.S.D.A. Forest Service; Pacific Northwest Region; Portland, OR. 98 pp.
- Frest, T.J. and E.J. Johannes. 1995b. Freshwater mollusks of the upper Sacramento River system, California, with particular reference to the Cantara Spill. 1995 Final Report to California Department of Fish & Game, Deixis Consultants, Seattle, Washington. 88 pp.
- Frest, T.J. and E.J. Johannes. 1999b. Field guide to survey and manage freshwater mollusk species. Unpublished report BLM/OR/WA/PL-99/045+1792 to the Bureau of Land Management, Oregon State Office, September 1999. 117 pp.
- Frest, T.J. and E.J. Johannes. 1999. Field Guide to Survey and Manage Freshwater Mollusk Species. Bureau of Land Management, Oregon State Office, Portland, Oregon. 117 pp. https://www.blm.gov/or/plans/surveyandmanage/files/01-aquatic_guide.pdf.
- Frest T.J. and E.J. Johannes. 2005. Springsnails of the Cascade-Siskiyou National Monument and vicinity, Oregon. 2004 report. Final report prepared for World Wildlife Fund, Ashland, Oregon. Deixis Consultants, Seattle, Washington.
- Strong, E.E., J.T. Garner, P.D. Johnson, and N.V. Whelan. 2022. A systematic revision of the genus Juga from fresh waters of the Pacific Northwest, USA (Cerithioidea, Semisulcospiridae). European Journal of Taxonomy 848: 1-97. Online: https://doi.org/10.5852/ejt.2022.848.1993
- U.S. Fish and Wildlife Service (USFWS). 2012. Endangered and Threatened Wildlife and Plants; 12-Month Finding on a Petition to List 14 Aquatic Mollusks as Endangered or Threatened. Federal Register 17(181):57922-57948.
- U.S. Fish and Wildlife Service (USFWS). 2025. 90-Day Findings for Nine Species. Notification of petition findings and initiation of status reviews. Federal Register 90(162): 41359.