2016年4月15日 星期五

Amphidromus metabletus pachycheilus f. fusca 34.6mm

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. fusca
Chinese name
Author von Möllendorff, 1901
Size 34.6mm
Description Juvenile, 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.

Amphidromus metabletus pachycheilus f. fusca 34.6mm






























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