Mysidacea

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Definition

Noun 1. A taxonomic order of small, shrimp-like crustaceans: Mysidacea refers to an order within the class Malacostraca. These are small, mostly marine crustaceans, commonly known as opossum shrimps or mysid shrimps. They are characterized by a carapace that covers the head and thorax, stalked eyes, and a brood pouch (marsupium) in females for carrying eggs and young.

Usage Examples
  • The Mysidacea are an important part of the marine zooplankton, serving as food for many fish.
  • Under the microscope, we observed several species belonging to the order Mysidacea.
  • The presence of a marsupium is a key identifying feature of Mysidacea.
Advanced Usage
  • The taxonomic order Mysidacea is sometimes considered a suborder (Mysida) within the larger order Peracarida in modern classification systems.
  • In ecological studies, the biomass of Mysidacea is often measured to assess the health of aquatic food webs.
Variants and Related Words
  • Mysid (noun): A common name for any member of the order Mysidacea; an opossum shrimp.
    • The sample contained numerous mysids.
  • Mysidopsis (noun): A genus within the Mysidacea.
  • Neomysis (noun): Another common genus within the Mysidacea.
Synonyms
  • Opossum shrimp (common name)
  • Mysid shrimp (common name)
Related Terms (Not direct synonyms)
  • Crustacean: The larger class of arthropods to which Mysidacea belong.
  • Zooplankton: The ecological community of floating animals, which includes many mysids.
  • Peracarida: The larger taxonomic superorder that may encompass mysids.
Noun
  1. opossum shrimp

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