Dec 28, 2025 · crustacean, any member of the subphylum Crustacea (phylum Arthropoda), a group of invertebrate animals consisting of some 45,000 species distributed worldwide. Crabs, lobsters, …

Dec 28, 2025 · Crustacean - Anatomy, Adaptations, Diversity: The crustacean nervous system consists of a brain connected to a nerve cord of ganglia. The most conspicuous sense organs are the …

Dec 28, 2025 · The earliest of the definite fossil crustaceans are ostracods; a decapod occurs in the Devonian. In classifying the Crustacea, a variety of structural features are important.

Dec 28, 2025 · These two processes at the tail end of the body vary greatly in form; in many crustaceans they are short, but in some they may be as long as the rest of the body. The Crustacea …

Dec 28, 2025 · There is no universal agreement on the classification of the Crustacea and even less agreement on the interrelationships between the various groups. Alternative classifications of the …

Crustaceans are a group of invertebrate animals consisting of some 45,000 species worldwide. Crabs, lobsters, and shrimps are all counted among the subphylum Crustacea. Crustaceans are found …

crustacean , Any member of the 45,000 arthropod species in the subphylum Crustacea.

Crustaceans are animals that usually have a hard covering, or exoskeleton, and two pairs of antennas, or feelers. People around the world eat many types of crustacean—for…

This is a list of significant crustaceans, which are members of the subphylum Crustacea. They are grouped taxonomically by class, with notable members of each class ordered alphabetically.

Malacostracan, any member of the more than 29,000 species of the class Malacostraca (subphylum Crustacea, phylum Arthropoda), a widely distributed group of marine, freshwater, and terrestrial …