protoconch in a sentence

Examples

1. Rostroconchs began their life as a small, bilaterally symmetrical, univalved protoconch planktonic larva.
2. The protoconch is usually shaped like a dome, and usually shows a few spirals.
3. The protoconch is intorted ( planorboid ).
4. The solid, fusiform shell contains 13 whorls of which two are in the protoconch.
5. The blunt, smooth protoconch contains 1?to 2 lip is arcuately produced in front.
6. The smooth protoconch consists of 1?whorl.
7. The shell contains 5 whorls, of which two in the smooth, elevated protoconch.
8. The pseudorthocerids are thought to be distinct because their protoconch and septal necks are so different.
9. The protoconch consists of 1?whorls.
10. The shell is acute, except for the apex of the protoconch, which is flattened.