Acella haldemani
long, slender, almost needle-like shell reaching almost 1 inch (25 mm) high and only 0.2 in (5 mm) wide
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Fossaria spp.
Adult shell 3-13 mm, turreted, nearly always without
spiral striae and without a columellar plait; outermost shell layer
color horn, tan or brown. |
Lymnaea
Adult shell length 30-
53 mm, thin and fragile, spire long and narrow; columella with
a strong plait (interior spiral appears braided); outermost shell
layer color horn to tannish-horn. |
Stagnicola catascopium
Adult shell 14-20mm, elongate-ovoid with a pointed
spire.
It has 6 whorls and a light brown to light greenish grey color. |
Radix auricularia
Adult shell 35mm high and 20mm wide, last whorl
elate and broadened to an ear's shape.
The shell is light or dark-brown, a little bit
reddish. The animal is yellow with black spots. |
Pseudosuccinea columella
Adult shell length 10-22 mm, succiniform - having
a thin and fragile shell that has a large oval body whorl with
a large shell aperture and a small spire. The surface sculpture
consists of microscopic, spiral, raised, periostracal striae.
Outermost shell layer color yellowish-horn to olive-tan.
The head, foot and mantle vary from light yellow to black. |