Fluminicola warnerensis
Hershler, Liu, Frest, and Johannes
Topaz Pebblesnail
G2ImperiledGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.769297
Element CodeIMGASG3370
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryInvertebrate Animal
Endemicendemic to a single state or province
KingdomAnimalia
PhylumMollusca
ClassGastropoda
OrderLittorinimorpha
FamilyLithoglyphidae
GenusFluminicola
Other Common NamesWarner Pebblesnail (EN)
Concept ReferenceHershler, R., H.-P. Liu, T.J. Frest, and E.J. Johannes. 2007. Extensive diversification of pebblesnails (Lithoglyphidae: Fluminicola) in the upper Sacramento River basin, northwestern USA. Zoological Journal of the Linnean Society 149:371-422.
Taxonomic CommentsFormerly undescribed from southwest Oregon (see Frest and Johannes, 2000). Identified in Frest and Johannes (2000) as Fluminicola n. sp. 13. Recently described by Hershler et al. (2007) as Fluminicola warnerensis.
Conservation Status
Review Date2011-09-15
Change Date2011-09-15
Edition Date2011-09-15
Edition AuthorsCordeiro, J.
Threat ImpactUnknown
Range Extent100-250 square km (about 40-100 square miles)
Number of Occurrences6 - 20
Rank ReasonsIt was recently described from specimens collected in a dozen sites in two California counties.
Range Extent CommentsIt is distributed within the drainage of the south fork of the Pit River, and along the Pit River just above Big Valley (upper Pit River basin), California (Hershler et al., 2007).
Occurrences CommentsHershler et al. (2007) cite material from 6 sites in Lessen Co., and 6 sites in Modoc Co., California.
Threat Impact CommentsThreats have not been assessed for this species.
Ecology & Habitat
Diagnostic Characteristics
Differs from similar F. turbiniformis in its larger size (SH, SW, P = 0), darker body pigment, less prominent sperm storage area in the coiled oviduct, complete overlap of the seminal receptacle by the albumen gland, broader bursa copulatrix, absence of a seminal receptacle duct, and frequent occurrence of a papilla-like capsule gland opening. Distinguished from geographically proximal F. erosus and F. lunsfordensis by its more elongate shell, more convex shell whorls, single basal cusp of the central radular tooth, and enlarged large central cusp of the lateral radular tooth. Also differs from the former in its larger size and from the latter by its weakly angled adapical portion of the aperture (Hershler et al., 2007).
Other Nations (1)
United StatesN2
| Province | Rank | Native |
|---|
| Nevada | S1 | Yes |
| California | SNR | Yes |
Roadless Areas (1)
California (1)
| Area | Forest | Acres |
|---|
| Mill | Modoc National Forest | 321 |
References (3)
- Freshwater Mollusk Conservation Society (FMCS). 2021. The 2021 checklist of freshwater gastropods (Mollusca: Gastropods) of the United States and Canada. Considered and approved by the Gastropods Names Subcommittee December 2020. Online: https://molluskconservation.org/MServices_Names-Gastropods.html
- 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.
- Hershler, R., H.-P. Liu, T.J. Frest, and E.J. Johannes. 2007. Extensive diversification of pebblesnails (Lithoglyphidae: <i>Fluminicola</i>) in the upper Sacramento River basin, northwestern USA. Zoological Journal of the Linnean Society 149:371-422.