1890 Pseudoperculate, provided with a pseudoperculum; having the aperture closed by a pseudoperculum.
1983 D. L. Hawksworth et al. (ed. 7) 35/2 Sherwood (1981) illustrated 9 main types [of ascus] distinguishable by light microscopy:..(F) pseudoperculate (e.g. Odontotrema); (G) operculate (e.g. Pezizales)..[etc.].