A taxonomic order containing the choanoflagellate protists, characterized by their distinctive collar-and-flagellum apparatus.
From choanoflagellate + -ida (taxonomic order suffix), representing the formal scientific classification grouping these organisms together based on shared structural features.
Choanoflagellida represents one of those wonderfully weird taxonomic ranks that falls between 'family' and 'class,' showing how scientists had to invent new classification boxes when they discovered organisms that didn't fit neatly into their original categories!
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