Vizella
Vizella Sacc., Syll. Fung. (Abellini) 2: 662 (1883).
Index Fungorum number: IF 5747; Facesoffungi number: FoF 07921, 30 morphological species (Species Fungorum 2022), no molecular data available.
Colonies epiphyllous, developing under the cuticle. Sexual morph: Hyphae ribbon-like consisting of hyaline cells alternating in pairs with much shorter dark cells or without thickened septa. Ascostromata disc-shaped with upper wall of irregularly arranged cells, scutate or crustose, roundish or elongate. Hamathecium comprising pseudoparaphyses in young ascostromata. Asci 8-spored, ovoid or saccate, short pedicellate or apedicellate, apically rounded with an inconspicuous ocular chamber, arranged radially around a central column. Ascospores biseriate, one celled or with a small appendage-like basal cell, brown, with a light-colored band around the middle or just above the middle septum. Asexual morph: Pycnidia disc-shaped with upper wall of irregularly arranged cells, scutate or crustose. Conidiogenous cells phialidic, hyaline, lining the inner cavity of the upper wall. Conidia ovoid, brown, with transverse hyaline band (adapted from Hyde et al. 2013).
Type species: Vizella conferta (Cooke) Sacc.
Notes: Vizella is characterised by ribbon-like hyphae, disc-shaped ascostromata, ovoid or saccate, short pedicellate or apedicellate asci and one-celled ascospores with a small appendage-like basal cell. Vizella comprises species characterised with light bands in the ascospores. Vizella resembles Mycerema in having a light band in the upper part of the ascospores, small hyaline basal cell and similar pseudoparaphyses. Hyde et al. (2013) suggested that the three genera Entopeltis, Mycerema and Vizella might be congeneric as they have similar ascomata with thin walls. Vizella is a distinct and type genus of Vizellaceae but lacks molecular data. Fresh collections with DNA sequence data are needed to confirm the taxonomic placement of the genus.
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