Kingdom Fungi R.T.Moore (1980) - fungi Phylum Chytridiomycota Doweld (2001) Class Spizellomycetes Tedersoo, Sánchez-Ramírez, Kõljalg, Bahram, M. Döring, Schigel, T.W. May, M. Ryberg & Abarenkov (2018) [monotypic] Order Spizellomycetales D.J.S. Barr (1980) Family Spizellomycetaceae D.J.S. Barr (1980) Genus Brevicalcar Letcher & M.J. Powell (2018) [monotypic] 1 Brevicalcar kilaueaenseᵀ Letcher & M.J. Powell