| None of the species examined show any kind of varix associated with the protoconch lip. |
| Spatial and temporal variation in statolith and protoconch trace elements as natural tags to track larval dispersal. |
| On the dorsal portion of the rostral face, the shell layers extend ventrolaterally from those of the protoconch. |
| It is not uncommon for both Recent and fossil volutes from southern South America to have a protoconch that is corroded to various degrees by cold acidic waters. |
| The latter species has a smooth, valvatiform, dextrally coiled teleoconch and a sinistral, anastrophic protoconch. |
| This considerable variation is due to the subellipsoidal form of the protoconch. |
