Zoomastigina

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Definition

Noun 1. A taxonomic group of flagellate protozoans: In some biological classification systems, "Zoomastigina" is the name for a class or phylum within the kingdom Protista. It comprises heterotrophic (non-photosynthetic) flagellates that obtain nutrients either by ingesting other organisms (holozoic) or by absorbing dissolved organic matter (saprozooic).

Usage Notes
  • The term "Zoomastigina" is primarily used in the context of scientific taxonomy and biology. It is a technical term from a specific, often older, classification system for protists.
  • It is not used in everyday conversation.
  • In modern taxonomic systems, many organisms once grouped under Zoomastigina are now classified differently (e.g., within the supergroup Excavata).
Examples
  • Scientific Context:
    • The parasite Trypanosoma was historically placed within the Zoomastigina due to its flagellar structure and heterotrophic nature.
    • Under the five-kingdom system, holozoic flagellates were categorized under the phylum Zoomastigina.
Advanced Usage
  • The group is characterized by the presence of one or more flagella (whip-like structures) used for locomotion.
  • Members of Zoomastigina lack chloroplasts and do not perform photosynthesis, distinguishing them from plant-like flagellates (Phytomastigina).
Variants and Related Words
  • Zoomastigophorea: An alternative class-level name sometimes used synonymously with Zoomastigina.
  • Zoomastigote (n): A general term for a flagellated protozoan cell, especially one that is heterotrophic. This describes the form of an organism, not its taxonomic group.
    • The infective stage of the parasite is a zoomastigote.
Synonyms
  • Zoomastigophorea (scientific synonym)
  • Animal-like flagellates (descriptive term, not a formal taxonomic name)
Different Meanings
  • This word has only one specific, technical meaning in biological taxonomy. It does not have common or figurative meanings.
Noun
  1. in some classifications considered a phylum of the kingdom Protista; holozoic or saprozoic flagellates

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