family Nostocaceae
Definition
Proper noun * Family Nostocaceae: A taxonomic family of cyanobacteria (blue-green algae) characterized by forming colonies of cells within a gelatinous sheath. Members of this family are found in diverse aquatic and terrestrial habitats and can fix atmospheric nitrogen.
Usage
- Scientific Classification: Used primarily in biological and microbiological contexts to classify a specific group of cyanobacteria.
- The sample was identified as belonging to the family Nostocaceae based on its filamentous structure and heterocyst formation.
- Researchers are studying nitrogen fixation in several genera within the family Nostocaceae.
Advanced Usage
- Taxonomic Hierarchy: The term is used within a specific rank in biological classification: Domain (Bacteria) > Phylum (Cyanobacteria) > Class > Order (Nostocales) > Family (Nostocaceae) > Genus (e.g., , ) > Species.
Variants and Related Words
- Nostocaceae: The standard form, often used without "family" in technical writing.
- The order Nostocales includes the families Nostocaceae and Rivulariaceae.
- Nostocacean (adjective): Of or pertaining to the family Nostocaceae.
- The nostocacean cyanobacteria formed visible mats on the pond surface.
Synonyms
- Blue-green algae (family): A common, informal name for the broader group, though not a precise taxonomic synonym.
- Cyanobacteria (family): The more precise modern term for the bacterial phylum, specifying the family level.
Notes on Meaning
- The term refers exclusively to a formal taxonomic grouping in scientific nomenclature. It is not used in everyday language.
- While "blue-green algae" is a historical and common name for these organisms, it is important to note that they are bacteria (prokaryotes), not true algae (eukaryotes). The family Nostocaceae is a subset of all cyanobacteria.
Noun
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blue-green algae
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