List of land snails of the Mariana Islands

[1] It has been estimated there are about 100 species of land snail on Guam, the southernmost Mariana Island, but about 20 of these have been introduced by human activities.

[1] Nearly all of the native species of land snail are in decline throughout the Mariana Islands, and many have not been seen for decades.

The southern islands of the Mariana archipelago are now almost devoid of native land snails.

Since then, all three of these species are now reduced by another biocontrol, the New Guinea flatworm (Platydemas manokwari), which is also predating native snails.

[1] The tiny islet of Alupat off Guam has been identified as a potential site for a snail preserve, as it has not been invaded by New Guinea flatworms, rosy wolfsnails, or Gonaxis snails.

Samoana fragilis (fragile tree snail), a critically endangered snail endemic to Guam and Rota
Platydemas manokwari (New Guinea flatworm), an invasive species in the Mariana Islands
Partula desolata , an extinct species endemic to Guam, known only from an archeological dig
Partula salifana (Mount Alifana partula), endemic to Guam, now extinct
Partula gibba (Fat Guam partulid), endemic to Guam, a critically endangered species
African Giant Snail ( Lissachatina fulica ), an introduced species in the Marianas
Mesembrinus multilineatus (lined treesnail), an introduced species commonly seen in the Mariana Islands
Veronicella cubensis (Cuban slug), an invasive species on Guam