 The genus "Hysteropatella" Rehm is transitional with paraphysoids and a well-developed pseudoepithecium, but the peridium, thickened base of the ascoma and cylindric asci are all features of the Hysteriaceae.Kutorga and Hawksworth (1997) in their revision of the "Patellariaceae" did not include Hysteropatella.Initial studies using the nuclear small subunit (nuSSU) rDNA have found that "Hysterium pulicare" and "Hysteropatella clavispora" (Peck) Seaver formed a clade with high statistical support, distant from other Dothideomycetes, and thus supporting the inclusion of the genus Hysteropatella within the Hysteriaceae.