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Home/Species/ Marbled Jumping-slug

Hemphillia danielsi

Vanatta, 1914

Marbled Jumping-slug

G3Vulnerable Found in 1 roadless area NatureServe Explorer →
G3VulnerableGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.118241
Element CodeIMGAS59030
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryInvertebrate Animal
Endemicendemic to a single nation
KingdomAnimalia
PhylumMollusca
ClassGastropoda
OrderStylommatophora
FamilyArionidae
GenusHemphillia
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 Date2018-12-03
Change Date2018-12-03
Edition Date2018-12-03
Edition AuthorsD. Bachen (2018), Cordeiro, J. (2006)
Threat ImpactUnknown
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences21 - 80
Rank Reasons
Species is known from less than 30 sites, and due to restricted range and number of known occurrences may be vulnerable to extirpation in parts of its range or extinction. Since last rank update, surveys across the known range in Montana have doubled the number of occurrences (Montana Natural Heritage Program Data, November 2018). These data support changing the previous rank of G2G3 to G3.
Range Extent Comments
A conservative estimate of known range is 10,000 square kilometers. Species is found within the Bitterroot Mountains along the Idaho border, and in the in the Clearwater and Salmon watersheds in Idaho (Burke ad Leonard 2013).
Occurrences Comments
Within Montana the species has been found at 25 sites, and in Idaho it has been documented at 2 sites (Frest and Johannes, 1995; Hendricks, 2003; 2005; Hendricks and Maxell, 2005; Hendricks 2012).
Threat Impact Comments
Logging and grazing may effect this species (Frest and Johannes 1995). Fire, drought and other factors that effect vegetative cover and available moisture may also impact the suitability of occupied areas. Unfortunately the effect of these threats on populations of this species has not yet been quantified.
Ecology & Habitat

Habitat

Characteristic of moderate-elevation, relatively rich ponderosa pine forest. A diverse understory, comparatively moist conditions, and intact litter (duff) layer would seem to be desiderata; moist valley, ravine, gorge, or talus sites are preferred, i.e. low on a slope and near permanent or persistent water, but not normally subject to regular or catastrophic flooding; persistence of moisture is a significant feature (Frest and Johannes 1995).
Other Nations (1)
United StatesN3
ProvinceRankNative
IdahoS2Yes
MontanaS1Yes
Threat Assessments
ThreatScopeSeverityTiming
2 - Agriculture & aquacultureUnknownUnknownHigh (continuing)
2.3 - Livestock farming & ranchingUnknownUnknownHigh (continuing)
5 - Biological resource useUnknownUnknownHigh (continuing)
5.3 - Logging & wood harvestingUnknownUnknownHigh (continuing)
7 - Natural system modificationsUnknownUnknownHigh (continuing)
7.1 - Fire & fire suppressionUnknownUnknownHigh (continuing)
11 - Climate change & severe weatherUnknownUnknownHigh (continuing)
11.2 - DroughtsUnknownUnknownHigh (continuing)

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Roadless Areas (1)
Idaho (1)
AreaForestAcres
North Lochsa SlopeNez Perce-Clearwater National Forest117,662
References (9)
  1. Burke, T.E. 2013. Land snails and slugs of the Pacific Northwest. Oregon State University Press, Corvallis. 352 pp
  2. Frest, T.J. and E.J. Johannes. 1995c. Interior Columbia Basin mollusk species of special concern. Final Report (contract #43-0E00-4-9112) prepared for Interior Columbia Basin Ecosystem Management Project. Deixis Consultants, Seattle, Washington. 274 pp. + tabs., figs.
  3. Hendricks, P. 2003. Status and conservation management of terrestrial mollusks of special concern in Montana. Unpublished report prepared for the U.S. Forest Service. Montana Natural Heritage Program, Helena, Montana. 67 pp. + app.
  4. Hendricks, P. 2005. Surveys for animal species of concern in northwest Montana. Section 4: Terrestrial mollusk surveys in northwestern Montana; and section 5: Plum Creek owl and mollusk surveys. Unpublished report to the Montana Department of Fish, Wildlife & Parks, Montana Natural Heritage Program, Helena, Montana, May 2005. 53 pp.
  5. Hendricks, P., and B.A. Maxell. 2005. USFS Northern Region 2005 land mollusk inventory: a progress report. Report submitted to the U.S. Forest Service Region 1. Agreement #05-CS-11015600-033. Montana Natural Heritage Program, Helena, Montana. 52 pp.
  6. Lucid, M. K., A. Rankin, A. Espindola, L. Chichester, S. Ehlers, L. Robinson, and J. Sullivan. 2018. Taxonomy and biogeography of <i>Hemphillia </i>(Gastropoda: Pulmonata: Arionidae) in North American rainforests, with description of a new species (Skade’s jumping-slug, <i>Hemphillia skadei</i> sp. nov.). Canadian Journal of Zoology 96:305-316.
  7. Pilsbry, H. A. 1939a-1948. Land Mollusca of North America (North of Mexico.) George W. Carpenter Fund for the Encouragement of Original Scientific Research, Philadelphia, Pennsylvania. 2107 pp.
  8. Pilsbry, H.A. 1948. Land Mollusca of North America (north of Mexico). Monograph of the Academy of Natural Sciences of Philadelphia, 2(2): 521-1113.
  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.