Catinella exile (Pleistocene catinella) - MNFI Rare Species Explorer

Catinella exile

Pleistocene catinella

Key Characteristics

Catinella exile is a tiny land snail with a 0.2 in (4.9 mm) long elongated shell (1.9 times tall as wide) that is deep orange in color. The spiral on the shell is lax, with less than 3 whorls.

Status and Rank

State Status: T - Threatened (legally protected)
State Rank: SU - Unrankable
Global Rank: G2 - Imperiled

Occurrences

County Name	Number of Occurrences	Year Last Observed
Chippewa	1	1998
Delta	1	1998
Mackinac	1	1998

Updated 05/08/2013. Information is summarized from MNFI's database of rare species and community occurrences. Data may not reflect true distribution since much of the state has not been thoroughly surveyed.

Habitat

Catinella exile inhabits highly calcareous open wetlands and moist cobble beaches, often found in leaf litter beneath sage-leaved willow (Salix candida) and in moist depressions of open mats. This species was originally described from Pleistocene fossils and thought to be extinct until discovered alive in a fen in Iowa in 1986.

Natural Community Types

Management

This species is vulnerable to foot and vehicle traffic. Hydrological changes in occupied habitat should be strictly avoided. Use of prescribed fire in occupied sites should be avoided, if possible, or should be applied very conservatively, leaving multiple refugia and using a burn interval of at least 15 years.

Active Period

Active from first week of April to fourth week of September

Survey Methods

Surveys can be conducted anytime during the growing season, but are most successful in spring and fall following rain showers or when the soil is moist, and during higher relative humidity conditions and cooler temperatures. Visual surveys consist of looking for individuals crawling on the ground, in moist leaf litter, and on or under woody debris. Litter sampling consists of collecting soil and leaf litter samples in the field and drying, sifting and looking for snail shells in the litter samples in the laboratory.

Visual survey
- Survey Period: From first week of April to fourth week of September
  - Humidity: Humid
Litter sampling
- Survey Period: From first week of April to fourth week of September
  - Humidity: Humid

Page Citation

Michigan Natural Features Inventory. 2007. Rare Species Explorer (Web Application). Available online at http://mnfi.anr.msu.edu/explorer [Accessed May 22, 2013]

More Information

See MNFI Species Abstract

References

Survey References

Nekola, J.C. 1998. Terrestrial Gastropd Inventory of the Niagaran Escarpment and Keweenaw Volcanic Belt in Michigan's Upper Peninsula. Small Grants Program, 1998 Nongame Wildlife Fund, Natural Heritage Program, Michigan DNR, Lansing. 133pp.

Schilthuizen, M. and H.A. Rutjes. 2001. Land snail diversity in a square kilometer of tropical rainforest in Sabah, Malaysian Borneo. Journal of Molluscan Studies 67:417-423.

Technical References

Nekola, J.C. 1998. Terrestrial Gastropd Inventory of the Niagaran Escarpment and Keweenaw Volcanic Belt in Michigan's Upper Peninsula. Small Grants Program, 1998 Nongame Wildlife Fund, Natural Heritage Program, Michigan DNR, Lansing. 133pp.

Nekola, J.C., T.A. Smith and T.J. Frest. 1996. Land snails of Door Peninsula natural habitats. Final report to the Wisconsin Chapter of The Nature Conservancy. 55pp.