Definition

Noun: - A large and heterogeneous taxonomic division of fungi. This group is defined by a lack of known sexually reproductive stages in its member species. It is a form division, meaning it is classified based on observable characteristics rather than confirmed genetic or reproductive relationships.

Usage

• The term is used in formal mycological (fungal) classification to categorize fungi that are primarily or exclusively known to reproduce asexually.
• It is a technical, scientific term.

Examples

• "Many common molds and mildews found in homes were historically placed within the ."
• "The classification served as a temporary grouping for fungi whose complete life cycle was unknown."

Advanced Usage

• The concept is often discussed in the context of changing fungal taxonomy due to DNA analysis. Many fungi once classified here have since been moved to other divisions (like Ascomycota or Basidiomycota) once their sexual stages were discovered or genetic links were established.
• The term is sometimes referred to informally as "Fungi Imperfecti" or "Deuteromycetes."

Variants and Related Words

• Deuteromycetes (n): Another name for the same group of fungi.
• Fungi Imperfecti (n): An informal, common name for this subdivision, meaning "imperfect fungi," referencing the unknown ("imperfect") part of their life cycle.

Synonyms

• Fungi Imperfecti: The most common synonym in biological contexts.
• Deuteromycetes: A direct taxonomic synonym.

Important Note

This is a historical taxonomic category. Modern fungal classification, based on molecular phylogenetics, no longer formally recognizes Deuteromycotina as a valid taxonomic division. The member species are now distributed primarily within the Ascomycota and Basidiomycota divisions. The term remains useful for describing the asexual, or "anamorph," stage of a fungus.

Noun

1. large and heterogeneous form division of fungi comprising forms for which no sexually reproductive stage is known