Leptodontidium is a genus of fungi belonging to the family Leptodontidiaceae. The genus was circumscribed by G. Sybren de Hoog in 1979.

Species , Species Fungorum (in the Catalogue of Life) accepts 11 species of Leptodontidium: Leptodontidium aciculare Leptodontidium aureum Leptodontidium beauverioides Leptodontidium boreale Leptodontidium camptobactrum Leptodontidium cubense Leptodontidium diaphanulum Leptodontidium irregulare Leptodontidium obscurum Leptodontidium quercuum Leptodontidium trabinellum

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