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Planorbella trivolvis

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA MOLLUSCA GASTROPODA HYGROPHILA PLANORBIDAE

Scientific Name: Planorbella trivolvis
Species Authority: (Say, 1817)
Common Name(s):
English Marsh Rams-horn
Synonym(s):
Helisoma trivolvis (Say, 1816)
Taxonomic Notes: Genetic examination of the molecular phylogeny of global Planorboidea at the COI and 18S molecular markers indicates that all North American taxa within the subfamily Planorbinae form a well-supported clade, as yet unnamed, but termed C-Clade (Albrecht et al. 2007).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2012
Date Assessed: 2012-03-05
Assessor(s): Cordeiro, J. & Perez, K.
Reviewer(s): Bohm, M., Collen, B. & Seddon, M.
Contributor(s): Dyer, E., Soulsby, A.-M., Whitton, F., Kasthala, G., McGuinness, S., Milligan, HT, De Silva, R., Herdson, R., Thorley, J., McMillan, K., Collins, A., Offord, S., Duncan, C. & Richman, N.
Justification:
Planorbella trivolvis has been assessed as Least Concern as this species is widespread and is considered stable and secure throughout its range. This species has a presumed large population, tolerance of a broad range of habitats, tolerance to habitat modification, lack of substantial immediate threats, and is not in decline.

Geographic Range [top]

Range Description: Burch (1989) lists the distribution of the nominal subspecies as the Atlantic Coast and Mississippi River northward to Arctic Canada and Alaska and southward to Tennessee and Missouri; for Planorbella trivolvis intertextum the distribution is listed as ranging from Long Pine Key in the southern Florida Everglades throughout peninsular Florida and north along the coast to Lake Waccamaw, North Carolina.
Countries:
Native:
Canada (Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland I, Nova Scotia, Ontario, Prince Edward I., Québec, Saskatchewan, Yukon); United States (Alabama, Alaska, Arkansas, California, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, New Hampshire, New Jersey, New York, North Carolina, North Dakota, Ohio, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, West Virginia, Wisconsin, Wyoming)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This species is considered stable throughout its range.
Population Trend: Stable

Habitat and Ecology [top]

Habitat and Ecology: This species is found in a broad range of habitats demonstrating a tolerance to habitat modification. It can be found in freshwater river drainages and tributaries, lakes and permanent artificial water bodies (NatureServe 2009).
Systems: Freshwater

Use and Trade [top]

Use and Trade: This species is not utilized.

Threats [top]

Major Threat(s): This species demonstrates a tolerance to habitat modification and it is unlikely that there are any substantial immediate threats impacting the global population of this species.

Conservation Actions [top]

Conservation Actions: This species has been assigned a NatureServe Global Heritage Status Rank of G5 - Secure (NatureServe 2009). There are no species-specific conservation measures in place, or needed, for this species.

Citation: Cordeiro, J. & Perez, K. 2012. Planorbella trivolvis. The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 21 December 2014.
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