Gammaridea

Classification

Phylum: Arthropoda
Subphylum: Crustacea
Class: Malacostraca
Superorder: Peracarida
Order: Amphipoda
Suborder: Gammaridea

Pronunciation

How to pronounce Gammaridea: /ɡæməˈraɪdiə/

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Summary

Gammaridea is a diverse suborder of small, shrimp-like crustaceans formerly encompassing the majority of amphipod species, now reduced in scope following taxonomic revisions. They act as important recyclers in aquatic ecosystems.

Physical Characteristics

Gammaridea members are small, shrimp-like crustaceans with a laterally compressed body. They possess large, well-developed eyes, and their bodies segment into distinct regions including the head, thorax, and abdomen.

Identification Tips

Look for their characteristic elongated bodies and segmented exoskeletons. Many species exhibit variations in color and can be distinguished by the shape of their appendages.

Habitat

Gammaridea are primarily found in marine environments, but a significant number of species inhabit freshwater and estuarine ecosystems.

Distribution

Gammaridea are widely distributed, with marine species found in oceans around the world and freshwater species found in rivers, lakes, and other water bodies.

Diet

Members of Gammaridea are generally detritivores, scavenging on decomposing plant and animal matter, although some species are predatory or herbivorous.

Life Cycle

Gammaridea's life cycle includes several larval stages, usually starting from eggs that hatch into nauplius larvae, followed by a series of molts until reaching maturity.

Reproduction

Reproduction typically involves external fertilization, with females carrying fertilized eggs in a brood pouch until they hatch.

Predators

Gammaridea are preyed upon by various fish, birds, and larger invertebrates, playing an important role in the food web.

Ecosystem Role

Gammaridea play a crucial role in aquatic ecosystems as scavengers and prey, contributing to nutrient cycling and energy flow.

Evolution

Gammaridea is considered paraphyletic and is currently being re-examined in taxonomic classification. Recent changes have resulted in the creation of new suborders and reallocation of several families.

Similar Taxa

Misconceptions

There may be confusion regarding the classification of Gammaridea as it has undergone several revisions and is often mistaken for other amphipod suborders.