Terminology Related to Morphologic Features of Molds

Several morphologic terms are used to help identify species of fungi:

  • Ascocarp: A large saclike structure in which sexual spores are produced.
Ascocarp

Ascocarp

  • Asci: Smaller sacs within an ascocarp containing four to eight ascospores.
Asci and Ascospores

Asci and Ascospores

Asci and Ascus

Asci and Ascus


  • Arthroconidia: A spore that is formed from the hyphae by fragmentation. Microscopically, mature arthoconidia appear square. rectangular, or barrel-shaped with thick walls.
Arthroconidia under microscope

Arthroconidia under microscope

Arthroconidia formation

Arthroconidia formation

Arthroconidia

Arthroconidia

 


  • Blastospore: A fungal cell produced by budding.
  • Chlamydoconidia: Round, thick-walled spores. May be intercalary (within the hyphae) or terminal (on the end of the hyphae.
  • Pseudohyphae: A chain of elongated yeast cells resembling hyphae
Difference between blastspore, pseudohyphae and True hyphae

Difference between blastspore, pseudohyphae and True hyphae

 

Candida albicans in its Hyphal Form

Candida albicans in its Hyphal Form

Blastospore, pseudospores and chlamydospore

Blastospore, pseudospores and chlamydospore

Differences between yeast, pseudohyphae and true hyphae

Differences between yeast, pseudohyphae and true hyphae

Pseudo and True Hyphae

Pseudo and True Hyphae


  • Conidia: Asexual spores produced singly or in groups.
  • Conidiophores: Specialized hyphal strands that produce conidia.
  • Phialide: A single, slender, tubular conidiophore.
  • Metulae: Secondary branches
Conidia and Conidiophore

Conidia and Conidiophore

Phialide,Conidia and  conidiophore

Phialide,Conidia and conidiophore

Difference between phialides and metulae

Difference between phialides and metulae

Phialide under magnification

Phialide under magnification

microscopic image of Penicillium sp 1- hypha 2- conidiophore 3- phialide 4- conida 5- septa

microscopic image of Penicillium sp:
1- hypha
2- conidiophore
3- phialide
4- conida
5- septa

Conidiophore + Phialides + Conidia

Conidiophore + Phialides + Conidia


  • Microconidia: Small, unicellular conidia that are round, elliptical, or pyriform (pear-shaped).
  • Macroconidia: Large, multi-septate conidia that are club- or spindle-shaped.
Macroconidia and Microconidia of Dermatophytes

Macroconidia and Microconidia of Dermatophytes

Spores of the three common genera of dermatophytic fungi (a) Macroconidia and microconidia of Trichophyton spp. (b) Macroconidia of Epidermophyton spp, which do not produce microconidia. (c) Spindle-shaped macroconidia, and microconidia of Microsporum spp

Spores of the three common genera of dermatophytic fungi
(a) Macroconidia and microconidia of Trichophyton spp. (b) Macroconidia of Epidermophyton spp, which do not produce microconidia. (c) Spindle-shaped macroconidia, and microconidia of Microsporum spp

Micro and Macro Conidia

Micro and Macro Conidia

Microconidia (MI), Macroconidia (MA) and Chlamydospore (CHL)

Microconidia (MI), Macroconidia (MA) and Chlamydospore (CHL)

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