Tracylla (Sacc.) Tassi, Bulletin Labor. Orto Bot. de R. Univ. Siena 6: 62 (1904)
Sordariomycetes order incertae sedis, Tracyllalales, Tracyllaceae, Tracylla
Index Fungorum number: IF10260; Facesoffungi number: FoF 07716; 3 morphological species; 2 species with sequence data
Endophytic, saprobic or pathogenic on leaves of grasses and trees. Asexual morph: Coelomycetous. Conidiomata pycnothyrial, superficial on leaves, round, brown, with central column of cells; ostiole lacking, margin of catenate, darker brown cells. Conidiophores reduced to conidiogenous cells arising from a central columella, doliiform to ellipsoid, hyaline, smooth, with a single conidiogenous locus, phialidic. Conidia solitary, hyaline, aseptate, smooth, guttulate, falcate to naviculate or ellipsoid, apex subobtusely rounded, base truncate; with or without unbranched polar appendages, not delimited by septa. Sexual morph: Undetermined (adapted from Crous et al. 2018d).
Type species: Tracylla spartinae (Peck) Tassi, Bulletin Labor. Orto Bot. de R. Univ. Siena 6: 62 (1904)
Notes: Tracylla was introduced as a subgenus by Saccardo (1895), and raised to generic rank by Tassi (1904). The genus is typified by Tracylla spartinae observed on Spartina patens and several other grasses in Brazil, Jamaica, Philippines, Sri Lanka, Thailand and USA (Nag Raj 1993). Two other species include T. aristata and T. eucalypti. Tracylla aristata was described from Eucalyptus leaf litter collected in Australia (Cooke 1891), New Zealand and South Africa (Crous & Van der Linde 1993), and on Hakea dactyloides (Nag Raj 1993). Tracylla eucalypti was observed from leaves of Eucalyptus urophylla in Colombia (Crous et al. 2018d). The three species differ in their conidial morphology with the presence (T. spartinae:14–18 × 6–8 μm, with apical and basal appendages 11–30 μm; T. aristata: 13–17 × 2–3 μm, apical appendage 6.5–14 μm) or absence of appendages [T. eucalypti 1–1.5 μm diam, (12–)17–19(–20) × (2.5–)3 μm].