Hydrocinaceae sensu Ekanayaka et al. 2019 includes Hydrocina, Clathrosporium, Filosporella, Varicosporium and Xerombrophila. However, in the phylogeny supporting this classification, Varicosporium was represented by V. delicatum, phylogenetically distant to the type species (V. elodeae, Discinellaceae); Xerombrophila, on a very long branch in their analysis, is weakly supported as Gelatinodiscaceae in multi-gene analyses; Filosporella is polyphyletic based on sampled specimens but the type species has not been sequenced. A clade in the Johnston et al. 2019 (doi 10.1186/s43008-019-0002-x) multigene tree places 'Varicosporium' delicatum and the Filosporella specimens treated by Ekanayaka in a well-supported clade amongst the mollisioid families, a clade that presumably represents Hydrocinaceae (Hydrocina has only rDNA sequences so was not treated in the Johnston et al. 2019 analysis). A recent ITS analysis places Hydrocina in a well-resolved clade with Clathrosporium, 'Varicosporium' delicatum and the Filosporella specimen treated by Ekanayaka. This clade is sister to Gelatinodiscaceae in the ITS tree, but phylogenetically more distant in the multi-gene analysis.