Suboval Ambersnail - Catinella vermeta
Succinea avara, Catinella avara
Shell is oblong-ovate (succineiform), to about 13 mm in length and 7 mm in width, surface irregularly wrinkled, to about 3 whorls. Shell coloration is translucent, pale yellowish to whitish. Aperture is ovate, about 3/5 to 2/3 the shell length. Head and body are grayish, tentacles blackish (Hendricks 2012, Burke 2013). Internal anatomy is described by Pilsbry (1948).
Native and widespread across North America, south to northern Mexico. In Montana, reported on both sides of the Continental Divide from four counties: Flathead, Lake, Wheatland, Wibaux. Elevation range is 814 to 1250 m (2670 to 4100 ft). Range and abundance in Montana poorly understood; current status needs investigation (Hendricks 2012).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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Riparian areas, near rivers, streams, springs, and ephemeral wetland pockets, also drier sites away from water. Canopy species include aspen, Engelmann spruce, cottonwood, dogwood and willow. Found under woody debris and leaf litter in moist places, also under rock, in talus, and at the base of shrubs. Habitat in Montana poorly documented (Hendricks 2012).
- Literature Cited AboveLegend: View Online Publication
- Burke, T. E. 2013. Land snails and slugs of the Pacific Northwest. Corvallis, OR: Oregon State University Press. 344 p.
- Hendricks, P. 2012. A Guide to the Land Snails and Slugs of Montana. A report to the U.S. Forest Service - Region 1. Montana Natural Heritage Program, Helena, MT. vii + 187 pp. plus appendices.
- Pilsbry, H.A. 1948. Land Mollusca of North America (north of Mexico), Volume II Part 2. The Academy of Natural Sciences of Philadelphia Monograph Number 2(2): 521-1113.
- Additional ReferencesLegend: View Online Publication
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- Berry, S.S. 1913. A list of Mollusca from the Mussellshell Valley, Montana. Nautilus 26:130-131.
- Berry, S.S. 1916. Notes of Mollusca of central Montana. Nautilus 29:124-128.
- Russell, R.H. and R.B. Brunson. 1967. A check-list of molluscs of Glacier National Park, Montana. Sterkiana 26:1-5.
- Squyer, H. 1894. List of shells from the vicinity of Mingusville, Montana. The Nautilus 8:63-65.
- Additional Sources of Information Related to "Snails / Slugs"