Как по Английски будет कठिनि वर्ग

plural noun

A large group of mainly aquatic arthropods which include crabs, lobsters, shrimps, woodlice, barnacles, and many minute forms. they are very diverse, but most have four or more pairs of limbs and several other appendages.

Примеры использования:

This would not be surprising if we consider extant marine arthropods such as crustacea where it is …