Pernastela is a genus of three pinhead or dot snail species that are endemic to Australia's Lord Howe Island in the Tasman Sea.
Species Pernastela charon Iredale, 1944 – lowland forest pinhead snail Pernastela gnoma Iredale, 1944 – dwarf pinhead snail Pernastela howensis Iredale, 1944 – Lord Howe pinhead snail
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