Length of mantle
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 |
1a.) Having a mantle that covers only the front part of the body |
Go to 2 |
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1b.) Having a mantle that extends nearly the entire body length |
Philomycidae |
Location of respiratory pore
|
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2a.) Respiratory pore in the anterior half of the mantle |
Arionidae, go to 4 |
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2b.) Respiratory pore in the posterior half of the mantle |
Go to 3 |
Centering point for fine sculptural patterning
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3a.) Mantle with fine ridges centered on mid-line |
Limacidae, go to 7 |
| |
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3b.) Mantle with fine ridges centered to right of mid-line |
Agriolimacidae, go to 6 |
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4a.) Foot mucus bright yellow to orange |
Arion hortensis |
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4b.) Foot mucus colorless but body mucus orange |
Arion subfuscus |
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4c.) Neither foot mucus nor body mucus orange |
Go to 5 |
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| |
5a.) Foot mucus colorless, animal 5 cm or less in length |
Arion fasciatus |
| |
5b.) Foot mucus colorless (may have some color in orange individuals) |
Arion rufus |
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6a.) Mucus a milky color and sticky |
Deroceras reticulatum |
| |
6b.) Foot mucus colorless and watery |
Deroceras laeve |
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7a.) Mucus sticky and sparse |
Limax maximus |
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7b.) Mucus watery and copious |
Lehmannia valentiana |
