Madeiran land snail explained

Madeiran land snail is a common name which has been given to several different species of terrestrial gastropods, air-breathing land snails:

• Caseolus calculus
• Discula lyelliana, found only on the Desertas Islands in the Madeira Archipelago; critically endangered
• Geomitra grabhami, critically endangered; remnant populations present on Desertas Islands of Madeira
• Geomitra moniziana
• Leiostyla abbreviata, extinct
• Leiostyla cassida
• Leiostyla corneocostata
• Leiostyla gibba, extinct