The teleoconch is dextrally coiled, but the larval shells are sinistral.
It is not known whether or not the veronicellids bear a larval shell.
The outer edge of the third and fourth whorls have a raised ridge (seen best in the larval shell).
Some of the fossil specimens preserve a pinkish colour of the larval shells.
Few larval shells have been described (and consequently an understanding of their fossil record is as yet unknown).
In this way the larval shell (protoconch) is formed.
The early postlarval shell is more robust and opaque than the larval shell but has no pigmentation.
The larval shell of a gastropod is called a protoconch.
The epithelium of the oyster's mantle secretes both the prodissoconch and the post larval shells, but at different times.
Tests were conducted to try to determine the reason why larval and adult shells have different compositions.
