Ascomycetes

/,æskəmai'si:ti:z/
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Definition
  1. Noun:
    • A large taxonomic class of higher fungi: "Ascomycetes" refers to a major class of fungi characterized by the production of sexual spores in microscopic, sac-like cells called asci. This class is coextensive with the division Ascomycota.
Usage
  • The term "ascomycetes" is used in scientific contexts, particularly in mycology (the study of fungi), botany, and biology, to classify and discuss this specific group of fungi.
  • It is typically treated as a plural noun (e.g., "The ascomycetes include...") but can also be used in a singular sense to refer to the class as a whole.
Examples
  • Noun:
    • Morels and truffles are highly prized ascomycetes.
    • The study focused on the reproductive cycle of various ascomycetes.
    • Ascomycetes constitute one of the largest groups of fungi.
Advanced Usage
  • "Ascomycetes" vs. "Ascomycota": While often used interchangeably in general discourse, "Ascomycota" is the formal taxonomic division (phylum) name, and "ascomycetes" can refer specifically to the class within that division, though it commonly serves as an informal name for all sac fungi.
  • In phylogenetic studies, the classification is frequently updated, but "ascomycetes" remains a common term for this evolutionary lineage.
Variants and Related Words
  • Ascomycete (n): The singular form, referring to any individual fungus belonging to this class.
    • The yeast used in baking is an ascomycete.
  • Ascomycetous (adj): Of or pertaining to the ascomycetes.
    • The ascomycetous fungi display a wide variety of forms.
  • Ascus (n, pl. asci): The sac-like structure where spores (ascospores) are formed, defining this group.
  • Ascomycota (n): The phylum or division name encompassing the ascomycetes.
Synonyms
  • Sac fungi: A common descriptive name for ascomycetes, derived from their defining ascus structure.
Notes
  • This is a specialized scientific term. There are no idioms or phrasal verbs associated with it in everyday English.
Noun
  1. large class of higher fungi coextensive with division Ascomycota: sac fungi

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