Pilgeriella
Pilgeriella Henn., Hedwigia 39 (Beibl.): (137) (1900).
Index Fungorum number: IF 4101; Facesoffungi number: FoF 11905, 2 morphological species (Species Fungorum 2022), no molecular data available.
Parasitic on living leaves. Sexual morph: Ascomata superficial, gregarious, solitary, seated on a subiculum, globose to subglobose, obovoid, dark brown, with apical ostiole. Peridium comprising 3–4 layers of dark brown cells of textura angularis. Hamathecium 5–8(–10) µm wide, comprising sparse, branched, septate, anastomosed, pseudoparaphyses. Asci 8-spored, bitunicate, fissitunicate, broadly obovoid to subclavate, with short pedicel, apically thickened, with an ocular chamber. Ascospores 2–3-seriate, ellipsoidal oblong, tapering towards the ends, aseptate, hyaline, sometimes with granulate cells. Asexual morph: Unknown (adapted from Boonmee et al. 2017).
Type species: Pilgeriella perisporioides Henn.
Notes: Pilgeriella was previously placed in Trichosphaeriaceae. The taxonomic placement of Pilgeriella has undergone many changes in recent years (Hansford 1946, Arx & Müller 1975, Toro 1952, Sivanesan 1984, Kirk et al. 2008, Lumbsch & Huhndorf 2010, Hyde et al. 2013, Wijayawardene et al. 2017). Boonmee et al. (2017) placed Pilgeriella in Botryosphaeriaceae based on morphology. Pilgeriella is characterised by broadly obovoid to subclavate asci having a thick wall and short pedicel, with an ocular chamber and ascospores are ellipsoidal oblong, aseptate and hyaline. Fresh specimen with DNA sequence data are needed to confirm the systematic position of Pilgeriella.
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