Phylum： Mollusca 軟體動物門
Class： Gastropods 腹足綱
Family： Camaenidae 南亞蝸牛科
Scientific name： Amphidromus metabletus pachycheilus f. flavus
Author： von Möllendorff, 1901
Description： Nha Trang, Vietnam.
Subsp. Pachychilus is stronger-shelled throughout, thicker lipped, parietal callus stronger ; suture more distinctly margined; base less wide than Amphidromus metabletus.
The individual variations are even more numerous than in the type, the following " forms " being distinguishable :
A (flava), uniform yellow. (for nomenclatural purposes equivalent to pachycheilus).
B (alba), uniform white.
C (tritaeniata), yellow with 3 brown bands, the middle one sometimes lost.
D (trizona), white with 3 bands.
E (interrupta), like D, but the bands interrupted and reduced to rows of spots.
F (confluens), like D, but the bands more or less widened and confluent.
G (fusca), uniform brown by widening and union of the bands, except for a white sutural line.
More detail photo, please click the following LINK PICTURE.