| Term | Definition |
| CONVOLUTE | Having the body whorl of the shell expand abruptly so as to wrap around and conceal all the older, subsequent whorls. See also: INVOLUTE. See other gastropod shapes. | |
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| WHORL, CONVOLUTE | Having the body WHORL of the shell expand abruptly so as to wrap around and conceal all the older, subsequent whorls as in Cyprea spp.. | |