Arctomiaceae Arthrorhaphidaceae Baeomycetaceae Cameroniaceae Hymeneliaceae Protothelenellaceae Trapeliaceae Xylographaceae The Baeomycetales are an order of mostly lichen-forming fungi in the subclass Ostropomycetidae, in the class Lecanoromycetes.

The family Baeomycetaceae was originally proposed by Barthélemy Charles Joseph Dumortier in 1829 (under the spelling Baeomyceae); he included two genera, Baeomyces and Calicium.

[7][8] Later studies demonstrated a sister group relationship between Baeomyces and the order Ostropales, and Baeomycetales was informally suggested as a suitable name for this lineage.

[9] After additional molecular studies confirmed the placement of the Baeomycetaceae in the subclass Ostropomycetidae,[10][11] the order Baeomycetales was formally circumscribed in 2007 by H. Thorsten Lumbsch, Sabine Huhndorf, and Francois Lutzoni.

[17] In a later review of the use of this method for biological classification of lichens, Robert Lücking considered this merge justified.