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Isodaphne perfragilis
Isodaphne perfragilis is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.[1] DescriptionThe length of the shell attains 18.5 mm, its diameter 7.5 mm. (Original description) The white, fusiform shell has a moderately long siphonal canal. It is very thin, fragile and hyaline. It contains eight whorls, of which about 2½ form the protoconch, with convex whorls and criss-cross sculpture. The subsequent whorls are convex, separated by a deep, linear suture, the upper ones are strongly angular at the shoulder, the angle however is fainter on lower whorls and nearly disappears on the body whorl. A second prominent liration is visible on upper whorls, but becomes likewise fainter. Moreover, the shell is crossed by numerous, fine, raised, spiral striae and finer axial ones, producing a fine cancellation. On the siphonal canal the spirals are stronger. The aperture is oval, angular above, with a rather short, moderately wide siphonal canal below. The peristome is broken, according to growth lines with a shallow sinus above, roundedly angular at the entrance of the siphonal canal. The columellar margin is convex at the body whorl, then nearly straight, slightly curved to the left, with a thin layer of enamel. [2] DistributionThis marine species occurs in the Makassar Strait and in the Ceram Sea, Indonesia at depths between 835 m - 2029 m References
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