Home/Species/ Malone Jumping-slug

Hemphillia malonei

Pilsbry, 1917

Malone Jumping-slug

G3Vulnerable Found in 3 roadless areas NatureServe Explorer →

G3VulnerableGlobal Rank

Identity

Unique IDELEMENT_GLOBAL.2.109518

Element CodeIMGAS59060

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryInvertebrate Animal

Endemicoccurs (regularly, as a native taxon) in multiple nations

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

Review Date2010-02-24

Change Date2005-02-24

Edition Date2010-02-24

Edition AuthorsCordeiro, J. (2010); STEINER, M. (1996)

Range Extent1000-5000 square km (about 400-2000 square miles)

Number of Occurrences6 - 80

Rank Reasons

Endemic to Pacific Northwest, fewer than 10 recent records prior to 1996 but starting to turn up more frequently in Washington. British Columbia reports are likely false.

Range Extent Comments

Endemic to Oregon (Gaines pers. comm., 1996). John Fleckenstein (WA NHP) reports several new sites including significant range extensions in Washington.

Occurrences Comments

Endemic to Oregon (Gaines pers. comm., 1996). John Fleckenstein (WA NHP) reports several new sites including significant range extensions in Washington. Also in British Columbia. In Washington, it occurs from elevation near sea level to 1300 m; and is known from Puget Sound lowlands, southern Olympic Peninsula, and both the Coast and Cascade Ranges (Hanham, 1926). Reports by Hanham (1926) for Mt. Brenton, Vancouver Island, of this species were later suggested to be misidentifications for Hemphillia dromedarius (Pilsbry, 1948; Kozloff and Vance, 1958); itself found on Mt. Brenton in 2001 (Ovaska et al., 2001).

Ecology & Habitat

Reproduction

Prior to copulation, the slugs engage in a prolonged trailing phase from 45 minutes to 3.5 hours. The mouth of the trailing slug is in nearly constant contact with the tail of the leading slug. Copulation lasts 3.5 to 12 hours, and a portion of the penis (the verge) is inserted into the gonopore and the spermatophore delivered internally (occasionally non-reciprocally). Eggs are deposited in single or multiple clusters over several weeks and hatch in 47-63 days at 14C under laboratory conditions. Captive raised slugs reach sexual maturity in the first year (Leonard and Ovaska, 2002).

Terrestrial Habitats

Forest/Woodland

Other Nations (1)

United StatesN3

Province	Rank	Native
Oregon	S3	Yes
Washington	S3	Yes

Roadless Areas (3)

Oregon (2)

Area	Forest	Acres
Bull Of The Woods	Mt. Hood National Forest	8,843
Wind Creek	Mt. Hood National Forest	5,438

Washington (1)

Area	Forest	Acres
Siouxon	Gifford Pinchot National Forest	12,773

References (8)

Gaines, E. Zoology Data Manager, Oregon Natural Heritage Program, Oregon Field Office, Portland, Oregon. Pers. comm.
Hanham, A.W. 1926. Hemphillia malonei Van. The Nautilus 39:143-144.
Kozloff, E. N. and J. Vance. 1958. Systematic status of Hemphillia malonei. The Nautilus 72:42-49.
Leonard, W.P. and K. Ovaska. 2002. Reproduction of the malone jumping-slug, Hemphillia malonei Pilsbry, 1917 (Mollusca: Gastropoda: Arionidae): laboratory observations. Nemouria 45: 1-15.
Lucid, M. K., A. Rankin, A. Espindola, L. Chichester, S. Ehlers, L. Robinson, and J. Sullivan. 2018. Taxonomy and biogeography of Hemphillia (Gastropoda: Pulmonata: Arionidae) in North American rainforests, with description of a new species (Skade’s jumping-slug, Hemphillia skadei sp. nov.). Canadian Journal of Zoology 96:305-316.
Ovaska, K., R. Forsyth, and L. Sopuck. 2001. Surveys for potentially endangered terrestrial gastropods in southwestern British Columbia, April-October 2000, 2001. Endangered Species Recovery Fund, Final Report, Project #ESR189 & Wildlife Habitat Canada, Project #10.138F.1R-01102. viii + 47 pp.
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.
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.