Ascomycota, genera » incertae sedis

Nanoschema

Nanoschema B. Sutton, The Coelomycetes: 589 (1980)

Facesoffungi number: FoF 07458

Ascomycota, genera incertae sedis

 

Parasitic on the host plant. Sexual morph: undetermined. Asexual morph: Conidiomata pale brown, tubular or cupulate, attached to the substrate by a small hypostroma, solitary, superficial, unilocular. Ostiole absent. Conidiomatal wall composed of thin-walled, brown to hyaline cells of textura angularis in the basal region, pale brown cells of textura porrecta in the lateral region, becoming shortly fimbriate in the apex. Conidiophores arising from the inner wall layer of basal stroma, hyaline, cylindrical, irregularly branched, septate, smooth-walled. Conidiogenous cells hyaline, enteroblastic, phialidic, cylindrical, integrated, determinate, smooth-walled. Conidia hyaline, ellipsoid, rounded at the apex, narrowed and truncate at the base, straight or slightly curved, 1-septate, smooth-walled, eguttulate (adapted from Sutton 1980).

 

Type species: Nanoschema elaeocarpi B. Sutton, The Coelomycetes: 589 (1980)

 

Notes: Nanoschema is similar to Cornucopiella, Dinemasporium, Hoehneliella, Infundibulomyces, Oncosporella, Pseudolachnea, Satchmopsis and Stevensonula with tubular or cupulate conidiomata (Sutton 1980, Cole and Kendrick et al. 1981, Sutton and Pascoe 1987, Nag Raj 1993, this study). However, Infundibulomyces, Oncosporella, and Satchmopsis can be distinguished from other genera by their glabrous conidiomatal wall. Nanoschema has ellipsoid, 1-septate conidia, which can be distinguished from ellipsoid, unicellular conidia in Cornucopiella, hyaline, ellipsoid, allantoid to naviculate or fusiform conidia bearing appendages in Dinemasporium and Pseudolachnea, hyaline to brown, 1-septate conidia with branched or unbranched appendages in Hoehneliella, and dark brown, broadly fusiform to mostly reniform conidia with appendages at each end in Stevensonula. Nanoschema is a monotypic genus. Nanoschema elaeocarpi is associated with leaf lesions on Elaeocarpus sphaericus (Elaeocarpaceae) in Solomon Islands. There is no molecular data available.

 

Distribution: UK (Sutton 1980).

 

Nanoschema elaeocarpi (redrawn from Sutton 1980) a Conidia. b Vertical section of conidioma. c Conidiophores, conidiogenous cells and developing conidia.

 

 

References:

 

Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.

 

 

 

 

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