Species Profile

Toothed Globe

Scientific Name: Mesodon zaletus
Taxonomy Group: Molluscs
COSEWIC Range: Ontario
COSEWIC Assessment Date and Status Change: November 2019
COSEWIC Status: Endangered
COSEWIC Status Criteria: B1ab(iii)+2ab(iii)
COSEWIC Reason for Designation: In Canada, this large terrestrial snail is near the northernmost extent of its global range in southern Ontario. The species is known from islands in Lake Erie and from Essex and Middlesex counties on the mainland. It is likely extirpated from six of nine known sites. Although the species has not been observed alive since 1994, it may still occur at the remaining three inaccessible sites where suitable habitat still exists. Main threats include increased droughts and flooding associated with climate change, invasive species, and pollution.
COSEWIC History of Status Designation: Designated Endangered in November 2019.
SARA Status: No schedule, No Status
Date of Listing (yyyy-mm-dd):

No schedule - No Status

Individuals of this species may be protected under Schedule 1 under another name; for more information see Schedule 1, the A-Z Species List, or if applicable, the Related Species table below.

Please note that this information is provided for general information purposes only. For the most up to date and accurate list of species listed under the Species at Risk Act, please see the Justice Laws Website.

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Protection

Federal Protection

Provincial and Territorial Protection

To know if this species is protected by provincial or territorial laws, consult the provinces' and territories' websites.

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Documents

PLEASE NOTE: Not all COSEWIC reports are currently available on the SARA Public Registry. Most of the reports not yet available are status reports for species assessed by COSEWIC prior to May 2002. Other COSEWIC reports not yet available may include those species assessed as Extinct, Data Deficient or Not at Risk. In the meantime, they are available on request from the COSEWIC Secretariat.

4 record(s) found.

COSEWIC Status Reports

  • COSEWIC Assessment and Status Report on the Toothed Globe (Mesodon zaletus) in Canada (2020-10-01)

    Toothed Globe is a large land snail (adult shell width 2.4 to 3.1 cm) with a globose-depressed (flattened sphere), yellow, solid shell that has a tooth-like denticle in the opening. This species is part of the unique fauna of the Carolinian Forest in Canada and, similar to other terrestrial snails, may have significance for ecosystem function through nutrient cycling. A Canadian range-edge population would be important for the global conservation of this species as are other range-edge species. Note: This COSEWIC assessment was received by the Minister on September 2, 2020.

Response Statements

  • Response Statement - Toothed Globe (2020-12-02)

    In Canada, this large terrestrial snail is near the northernmost extent of its global range in southern Ontario. The species is known from islands in Lake Erie and from Essex and Middlesex counties on the mainland. It is likely extirpated from six of nine known sites. Although the species has not been observed alive since 1994, it may still occur at the remaining three inaccessible sites where suitable habitat still exists. Main threats include increased droughts and flooding associated with climate change, invasive species, and pollution.

COSEWIC Annual Reports

  • COSEWIC Annual Report 2019 to 2020 (2020-09-02)

    Over the past year COSEWIC assessed a total of 21 wildlife species, none of which were assigned a status of Not at Risk. Of these 21, COSEWIC re-examined the status of nine wildlife species; of these, 44% were reassessed at the same or lower level of risk. To date and with the submission of this report, COSEWIC’s assessments now include 810 wildlife species in various risk categories including 363 Endangered, 190 Threatened, 235 Special Concern, and 22 Extirpated (i.e. no longer found in the wild in Canada). In addition, 19 wildlife species have been assessed as Extinct, 59 wildlife species have been designated as Data Deficient, and 198 have been assessed as Not at Risk.

Consultation Documents

  • Consultation on Amending the List of Species under the Species at Risk Act: Terrestrial Species December 2020 (2020-12-02)

    COVID-19 and the consultations on the listing of species at risk As a result of the ongoing COVID 19 situation, it is not possible to have in-person meetings. Taking this into consideration, please note that consultation closing dates have been set for both the Normal and Extended consultations for the terrestrial species considered in this document. We will work to ensure that all the known, potentially affected parties have the opportunity to contribute to the consultations and that the consultation process is flexible and sensitive to the current context. If you wish to contribute, please submit your comments by April 2, 2021 for species undergoing normal consultations and by September 2, 2021 for species undergoing extended consultations. You may provide comments by email, letters, or through the online survey. The Government of Canada is committed to preventing the disappearance of wildlife species at risk from our lands. As part of its strategy for realizing that commitment, on June 5, 2003, the Government of Canada proclaimed the Species at Risk Act (SARA). Attached to the Act is Schedule 1, the list of the species provided for under SARA, also called the List of Wildlife Species at Risk. Extirpated, Endangered and Threatened species on Schedule 1 benefit from the protection afforded by the prohibitions and from recovery planning requirements under SARA. Special Concern species benefit from its management planning requirements. Schedule 1 has grown from the original 233 to 622 wildlife species at risk. Please submit your comments by April 2, 2021, for terrestrial species undergoing normal consultations and by September 2, 2021, for terrestrial species undergoing extended consultations. For a description of the consultation paths these species will undergo, please visit the Species at Risk (SAR) Public Registry website at: The Minister of the Environment's Response to Species at Risk Assessments. To respond to survey questions, please go to the survey page. Consultation ends on April 2, 2021 for species undergoing a normal consultation process and on September 2, 2021 for species undergoing an extended consultation process.
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