Pleosporales » Didymellaceae » Neoascochyta

Neoascochyta desmazieri

Neoascochyta desmazieri (Cavara) Qian Chen & L. Cai, Stud. Mycol. 82: 198 (2015)

Facesoffungi number: FoF 07464

 

Habit on dead stems of Fabaceae and Poaceae (Chen et al. 2015) or on human (Valenzuela-Lopez et al. 2018). Sexual morph: undetermined. Asexual morph: Conidiomata 100150 µm diam., 80100 µm high, black, pycnidial, mostly solitary, superficial or semi-immersed, globose or subglobose, unilocular, thick-walled, ostiolate, papillate. Conidiomatal wall 1530 µm wide, composed of textura angularis with thick-walled, dark brown, larger cells becoming paler and compact towards conidial hymenium. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 36 × 36 µm, arising all around the basal region of the conidiomata, hyaline, enterblastic, phialidic, dolliform or ampulliform to broadly conical, determinate, smooth-walled, formed from the innermost layer of cells of the pycnidial wall. Conidia 1214 × 24 µm (= 13 × 3; n= 50), hyaline, cylindrical, rounded at both ends, straight, 1-septate, smooth-walled, guttulate.

 

Culture characters: Colonies on PDA, reaching 4050 mm diam. after 7d at 25–30°C, white to pale grey in the middle zone, becoming darker with age, velutinous to felty, flattened, dense, subsuperficial, reverse black in the middle region, paler toward margins. Margins even, entire, neat.

 

Material examined: Italy, Province of Arezzo, Stia, Montemezzano, on dead aerial stems of Vicia sp. (Fabaceae), 3 October 2012, Erio Camporesi, IT769 (MFLU 19-2881), living culture MFLUCC 13-0395 = ICMP 20787, (KUN, HKAS 93667).

 

Notes: Neoascochyta desmazieri has also been isolated from the head, respiratory tract, and toe nail of humans (Valenzuela-Lopez et al. 2018).

Neoascochyta desmazieri (MFLU 19-2881) a Herbarium specimen. b, c Appearance of black conidiomata on the host. d Vertical section of conidioma; e. Vertical section of peridium. f–g, i–j Conidiogenous cells and developing conidia. h Germinated conidium. km Conidia. n Culture on PDA. Scale bars d = 50 µm, e, h = 20 µm, f–g, i–j = 5 µm, km = 10 µm, n = 25 mm.

 

 

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.

 

 

 

 

About Coelomycetes

The website Coelomycetes.org provides an up-to-date classification and account of all genera of the class Coelomycetes.

Contact