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|Noun||1.||Heterotrichales - yellow-green algae with simple or branching filaments; comprising the single family Tribonemaceae|
protoctist order - the order of protoctists
Chrysophyta, division Chrysophyta - mostly freshwater eukaryotic algae having the chlorophyll masked by brown or yellow pigment; yellow-green and golden-brown algae and diatoms: Xanthophyceae, Chrysophyceae, Bacillariophyceae; some classification systems superseded or subsumed by Heterokontophyta
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