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