Как по Английски будет ammonoideen

Как переводится Ammonoids на Русский язык:

Что значит Ammonoids в Английском языке:

noun

An extinct cephalopod mollusc with a flat-coiled spiral shell, found commonly as a fossil in marine deposits from the devonian to the cretaceous periods.

Примеры использования:

In the lower devonian, ammonoids appeared, leaving us large limestone deposits from their shells.

adjective

Relating to the ammonoids.

Примеры использования:

This study, which represents part of my ph.d. thesis, could not have been performed without the tho…