Sinployea decorticata

Sinployea decorticata a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Charopidae. This species was endemic to the Cook Islands; it is now extinct.
Shell description.
"Sinployea decorticata" was originally discovered and described under the name "Pitys decorticata" by American naturalist Andrew Garrett in 1872.
Garrett's original text (the type description) reads as follows:
The width of the shell is 4 mm. The height of the shell is 2 mm.
Type specimen are stored in the collection of Academy of Natural Sciences in Philadelphia.
Distribution.
Type locality is Rarotonga Island, Cook Islands.
Habitat.
Andrew Garrett commented on the habitat of this land snail, saying it was, "a common species found on the ground in a mountain ravine".
References.
This article incorporates public domain text from reference.