Kansas Land Snail – Zonitoides arboreus

Zonitoides arboreus (Say, 1816)
Quick Gloss
Family Gastrodontidae

 

Identification: 4-6 mm diameter, glossy shell, irregular growth lines, 4-5 whorls, umbilicate, thin lip not reflected.

Habitat: generalist, woodlands, some grasslands, leaf litter, woody debris (look in the crevices).

Map: orange = county with previous collection; yellow = new collection in previous county; green = new county record.

Kansas Status: widely distributed in eastern third of the state, plus a single county in the northwest (Cheyenne Co.)

Kansas Land Snail – Xolotrema fosteri

Xolotrema fosteri (F. C. Baker, 1921)
Bladetooth Wedge
Family Polygyridae

Identification: shell imperforate, large parietal tooth, subglobose, rounded periphery, shell usually >17 mm, tooth in upper part of outer lip.

Habitat: woodland species, associated with woody debris, limestone hillsides and outcrops, large boulders.

Map: green = new county record.

Kansas Status: distributed in eastern half of the state in suitable habitat.

Kansas Land Snail – Webbhelix multilineata

Webbhelix multilineata (Say, 1821)
Striped Whitelip
Family Polygyridae

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Identification: This is a large snail, 20 to 25 mm diameter, depressed globose, imperforate, oval aperture oval to lunate, usually without lamellae, peristome narrowly reflected, olive-brown shell color, but with multiple reddish brown spiral bands (sometimes absent).

Habitat: This is a snail of “marshy woodlands and meadows” according to Leonard (1959). According to Oesch et al. (in press), this snail can escape floodwaters by climbing up tree trunks or on other vegetation and summarizes an earlier work reporting this species might be predacious on other snails.

Map: orange = county with previous collection.

Kansas Status: not know, has not been re-collected; restricted to the northeast corner of the state.

Kansas Land Snail – Vertigo (Vertigo snails)

Vertigo (Vertigo snails)

Land snails of the genus Vertigo are tiny (about 2 mm or 1/16 inch) members of the land snail community. While small, most have an aperture with numerous denticles (teeth) of various locations and characteristics. Three species, at least, are recorded in Kansas according to Nekola and Coles (2010): Vertigo milium, Vertigo ovata, and Vertigo tridentata. More are likely.

Identification: V. milium: 6 or more apertural lamellae, shell height <1.9 mm. V. tridentata: 3-4 apertural lamellae, shell height 1¾-2 mm. V. ovata: 5 apertural lamellae, shell <2¼ mm tall. (Based on characters from Nekola and Coles 2010, but assuming these are the only species to choose from. Otherwise, use their key.)

Habitat: found in a wide variety of habitats, in litter and thatch; from mesic to wet habitats, some may climb up on herbaceous vegetation.

    

Map: orange = county with previous collection; green = new county record.

Kansas Status: not known, these are diminutive snails, not always seen even if present.

Kansas Land Snail – Ventridens (Domed snails)

Ventridens (Domed snails)

These are two mid-sized land snails (Ventridens demissus, the Perforate Dome, and Ventridens ligera, the Globose Dome). Both have a dome shape, perforate umbilicus, and glossy shell.

Ventridens demissus (A. Binney, 1843)
Perforate Dome
Family Gastrodontidae

Ventridens ligera (Say, 1821)
Globose Dome
Family Gastrodontidae

Identification: Ventridens ligera has 6-7 whorls, usually wider than 11 mm in diameter, higher dome, basal lamina inside lip. V. demissus (pictured) is narrower in diameter, lower dome, less than 11 mm.

Habitat: woodlands, moister areas; only new specimens were of V. demissus collected in the same county in residential yards; among damp woody and leafy debris along fence line at one residence.

   

Map: orange = county with previous collection; green = new county record.

Kansas Status: restricted; not known for the Globose Dome; the Perforate Dome in only one southeastern Kansas county in residential areas and probably not secure.

Kansas Land Snail – Vallonia parvula

Vallonia parvula Sterki, 1893
Trumpet Vallonia
Family Valloniidae

Identification: a most unique looking small snail in Kansas; 1.5-2.0 mm; aperture rounded and lip reflected; whorls with irregularly spaced high ribs or ridges, whitish shell.

Habitat: both upland and floodplain woodlands, in and around woody debris or rocks, may be in dirt; Oesch et al. (in press) note it in glade and prairie situations.

 

Map: orange = county with previous collection; yellow = new collection in previous county; green = new county record.

Kansas Status: scattered distribution in suitable habitat. Two other Vallonia species are found across the border in Missouri: Vallonia perspectiva Sterki 1893 and Vallonia pulchella (Müller 1774).

 

Kansas Land Snail – Philomycus carolinianus, a slug

Philomycus carolinianus (Bosc, 1802)
Carolina Mantleslug
Family Philomycidae

Identification: mantle completely covers the upper surface of the body; mantle splotched with two black longitudinal rows of black spots near midline.

Habitat: a woodland species, in protected areas (under fallen tree trunks, under bark or below leaf litter), not an urban slug, may come out on wet nights and be found on bark.

Map: orange = county with previous collection; yellow = new collection in previous county.

Kansas Status: widely distributed in eastern third of the state, with one record from Meade County in the southwest.