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.
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