clade Euthyneuraclade Panpulmonata clade Eupulmonata clade Stylommatophora Megalophaedusa martensi is a species of medium-sized air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Clausiliidae, the door snails, all of which have a clausilium.

Megalophaedusa martensi is the largest species in the family Clausiliidae, worldwide.

[1] This species is endemic to Japan.

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