Table 3.

Description of Arthroderma lilyanum and Arthroderma mcgillisianum, and similar genetic or clinical presentation fungi. CA = California. TN = Tennessee. TX = Texas. WI = Wisconsin. * = culture characteristics of fungi grown on Sabouraud dextrose agar (SDA). ** = major reservoir species listed, there are reports of other animals harboring this fungus.

Fungal species	Culture characteristics*	Micromorphology	Habitat	Distribution
Arthroderma lilyanum	• Growth at 20–25°C, 30°C• No growth at 33°C, 37°C• Surface color: lily white• Reverse color: oxide yellow• Texture: cottony	• Hyaline, septate hyphae• Spiral hyphae rare• Ellipsoidal microconidia• Hair perforation test: negative• Urease positive	Domestic cats	USA: CA
Arthroderma mcgillisianum	• Growth at 20–25°C, 30°C• No growth at 33°C, 37°C• Surface color: satin white• Reverse color: apricot to butter yellow• Texture: cottony	• Hyaline, septate hyphae• Ellipsoidal microconidia• Hair perforation test: negative• Urease positive	Domestic cats	USA: CA
Microsporum canis 18	• Growth at 20–25°C• Surface color: greyish- to tannish-white• Reverse color: deep ochraceous-yellow• Texture: woolly	• Tear-shaped microconidia• Spindle-shaped macroconidia• Hair perforation test: positive• Urease positive	Domestic cats, dogs, rabbits**	Worldwide
Arthroderma quadrifidum 19	• Growth at 25°C• Surface color: white to pale yellowish• Reverse color: yellowish brown• Texture: fluffy to powdery	• Cylindrical macroconidia• Elongate pyriform microconidia• Pale yellow, septate hyphae	Soil, feathers, hair	Worldwide
Arthroderma redellii 26	• No growth at 25°C• Surface color: white• Reverse color: yellow• Texture: velutinous	• Hyaline, septate hyphae• Thallic conidia	Bats (Myotis lucifugus and Myotis velifer)	USA: TN, TX, WI