Toxic Black Mold Inspection, Testing, Removal, & Prevention
in Midwestern and Eastern USA and Canada by Environmental Hygienists and Industrial Hygienists Phillip & Divine Fry

Email   ►Phone USA 1-810-639-0523 or 1-480-310-7970
Toxic Mold Species Information Toxic Mold Pictures  Mold Health Effects  Mold Inspection 
Mold Removal  Mold Terms & Definitions  Mold Victim Rights  Site Map

Scytalidium Mold Species

Scytalidium species are causative agents of Dermatomycosis,
Dermatophytosis, and  Phaeohyphomycosis.

(Information from @ 2005)




Taxonomic Classifications

Kingdom: Fungi
Phylum: Fungi Imperfecti
Genus: Scytalidium

Scytalidium Mold Picture

Scytalidium microscopic morphology

(Image Courtesy of @ 2005)

Microscopic morphology of the Scytalidium anamorph showing chains of 1 - to 2 - celled, darkly pigmented arthroconidia produced by the holothallic fragmentation of undifferentiated hyphae.




Scytalidium is a cosmopolitan, saprobic fungus which is at times associated with decaying wood or soil, and sometimes with woody plants diseases, particularly in tropical and sub tropical regions. 





This genus lacks a known sexual state and is generally classified as a dark walled dematiaceous fungus.  There are five existing species under the Scytalidium genus namely, Scytalidium dimidiatum, Scytalidium hyalinum, Scytalidium infestans, Scytalidium japonicum, and Scytalidium lignicola




Pathogenicity and Health Effects


Scytalidium species is an occasional agent of nail or skin infections.  Some cases of subcutaneous or disseminated infection have also been noted.  Additionally, Scytalidium dimidiatum and Scytalidium hyalinum are causative agents of onychomycosis and dermatomycosis.



Macroscopic Appearance


     Growth rate is very rapid and colony texture is wooly; and

      Both surface and reverse colony color ranges from white to gray.



Microscopic Appearance


      Hyphae are septate, hyaline or pale gray in color; and

      Arthroconidia are hyaline or pale brown in color, ellipsoidal - or oval shaped, and unicellular or bicellular.



               Table 1. Microscopic Feature Differences in Scytalidium arthroconidia.

Scytalidium species

Microscopic Features

Scytalidium dimidiatum

Brown colored arthroconidia

Scytalidium hyalinum

Hyaline arthroconidia






Scytalidium dimidiatum and Scytalidium hyalinum are usually inhibited by cycloheximide. 





Scytalidium, unlike Geotrichum, produces wooly colonies and brown pigmented hyphae and arthroconidia.

The mycological information gathered and
organized in this extensive research on different
Pathogenic Molds was sourced out from the list of
informative websites and reference below:

A Clinical Laboratory Handbook:
Identifying Filamentous Fungi by
St. Germain, Guy and R. Summerbell.


Entire Home Mold Testing

Effectively test your entire home for toxic mold, black mold, and/or any type of mold growth either by hiring a Certified Mold Inspector or reading the in depth ebooks

Do - it - BEST - Yourself Mold Prevention, Inspection, Testing, and Remediation Guide.

[Toxic Mold Species]
[Mold Health Effects]
[Mold Inspection]
[Mold Remediation]
[Mold Advice]
[ Site Map]

Browse these Webpages
[Mold Species]
[Lecythophora Species]
[Wangiella dermatitidis]


Copyright 2002-2015 Environmental Hygienists All Rights Reserved   Updated Jan. 18, 2015