NAS - Nonindigenous Aquatic Species

Disclaimer:

The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.

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Common name: liver elimia

Taxonomy: available through www.itis.gov

Size: can reach 20 mm in length

Native Range: St. Lawrence River drainage from Great Lake to Lake Champlain; tributaries of the Ohio River east of the Scioto River in Ohio; Wabash River, west to the Illinois River.

Means of Introduction: Migrated via the Erie Canal to the Hudson River.

Impact of Introduction: The impacts of this species are currently unknown, as no studies have been done to determine how it has affected ecosystems in the invaded range. The absence of data does not equate to lack of effects. It does, however, mean that research is required to evaluate effects before conclusions can be made.

Remarks: Found in freshwater rivers and streams on rock shoals and gravel bars.  Sexes are separate and eggs are usually laid in spring in Elimia snails; often sexually mature in a year; can live 5 years.

Other Resources:
US Fish and Wildlife Service Ecological Risk Screening Summary for Elimia livescens

Author: Benson, A.J.

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.