I. arizonicus is a locally common saprotrophic polypore that induces white rot in sycamore trees in southwestern North America.

[1] Host species include Platanus wrightii (Arizona sycamores) and Platanus racemosa (California sycamores).

[2] The fruiting bodies, shaped like hooves or a plate or a stack of plates, can appear on trunks, at the base of living trees, or on stumps or snags.

[3] In California this species is generally found south of the San Francisco Bay Area.

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