 Zogg (1962) characterized the Hysteriaceae as having ovoid to elongate thick-walled hysterothecia, with a prominent sunken slit, whereas the Mytilinidiaceae, as the Lophiaceae, were characterized by a thin-walled, fragile mussel-shaped (conchate) or hatchet-shaped (dolabrate) ascoma, standing on edge, with a prominent, crested apex.Zogg (1962) postulated that the two families were unrelated, with the Hysteriaceae connected to the Dothioraceae, and the Mytilinidiaceae showing relationships to the Lophiostomataceae.Although Luttrell held a very wide concept of the "Hysteriales" (1973), he did not recognize the family Lophiaceae, instead proposing a subfamily within the Hysteriaceae to accommodate mytilinidiaceous forms.