Amphidromus masoni is a species of air-breathing, arboreal land snails in the family Camaenidae.
Distribution This species is endemic to Assam, India.
Description The height of the shell attains 30.5 mm, its diameter 12.75 mm.
(Original description) This sinistral shell is acuminately oblong, thick, with a rather flattened spire. It comprises seven smooth and glossy whorls, exhibiting fine spiral striations under magnification. The shell's color is sea-green, intensifying below the keel and fading towards the apex. The columella is dark purple, and a narrow fillet of the same color closely borders the suture below, originating at the upper and outer angle of the aperture. The aperture is oval, angular above, with a slightly reflected lip. The body whorl is slightly keeled.
References
Laidlaw, F. F. & Solem, A. (1961). The land snail genus Amphidromus. A synoptic catalogue. Fieldiana: Zoology. 41: 503-677. Ramakrishna, Mitra, S, C. & Dey, A. (2010). Annotated checklist of Indian land molluscs. Zoological Survey of India, Kolkata, 359 pp.
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