Mold Testing & Mold Removal. 6 Types of Harmful Mold That May Be Lurking in Your Home Stachybotrys. Commonly referred to as “black mold,” stachybotrys is one of the most dangerous types of mold and can cause flu-like symptoms, diarrhea, headaches, memory loss and severe respiratory damage. ... Chaetomium Aspergillus Penicillium Fusarium Alternaria.