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<< Go back one level - Achatina - Giant African Land Snails

species

Achatina occidentalis Pilsbry, 1904

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Pulmonata - pulmonates »  family Achatinidae »  genus Achatina - Giant African Land Snails

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Achatina occidentalis

Author: Tryon & Pilsbry

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Description

Shell ovate-conic, rather thin but strong, pure white under a thin straw-yellow cuticle, which is absent from the early whorls. Spire rather long and straightly conic, the apex obtuse. First whorl smooth, the next faintly rippled, the rest of the whorls closely and finely striate, the stride more or less irregular or anastomosing, decussated. On the last whorl the striae are coarser, and obsolete except near the suture, giving place to very weak, coarse wrinkles; and the spirals disappear except near the suture, where they are rather weak. Whorls 8%, convex, the last rather inflated below. Aperture ovate, bluish-white within. Columella narrow, white, concave above, very narrowly truncate below, a small ridge, terminating at the basal notch, behind it. Parietal callous a transparent film. Outer lip brownish at the edge. Length 70, diam. 34, length of aperture 34.5 mm.
Tryon, G.W. & Pilsbry, H.A.; 1904-1905; Manual of Conchology, Series 2, Volume 17, African Achatinidae

Interchangeable taxa

This rather glossy white species is distinguished by its rather long spire, quite sinuous columella which is only narrowly truncate, and the small aperture, less than one-half the length of the shell. The last whorl is smooth except near the suture.
Tryon, G.W. & Pilsbry, H.A.; 1904-1905; Manual of Conchology, Series 2, Volume 17, African Achatinidae

Distribution

West Africa. Equatorial Guinea: Corisco Island.
Tryon, G.W. & Pilsbry, H.A.; 1904-1905; Manual of Conchology, Series 2, Volume 17, African Achatinidae
Author: Jan Delsing

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