Pleosporales » Didymellaceae » Ascochyta

Ascochyta medicaginicola

Ascochyta medicaginicola Qian Chen & L. Cai, Stud. Mycol. 82: 187 (2015) = Phoma medicaginis Malbr. & Roum., in Roumeguère, Fungi Selecti Galliaei Exs. 37: no. 3675 (1886) = Ascochyta medicaginicola var. macrospora Qian Chen & L. Cai, Stud. Mycol. 82: 187 (2015) = Ascochyta medicaginicola var. medicaginicola Qian Chen & L. Cai, Stud. Mycol. 82: 187 (2015)


Index fungorum: IF 814129



Saprobic, endophytic or pathogenic on the host plant in terrestrial habitat (Ellwood et al. 2006; Aveskamp et al. 2008, 2010; Rivera-Orduña et al. 2011). Sexual morph: see Tibpromma et al. (2017). Asexual morph: Conidiomata 150–250 μm diam., 100–150 μm high, dark brown, pycnidial, solitary to gregarious, immersed to semi-immersed, globose, unilocular, thick-walled, ostiolate. Ostiole circular, papillate, centrally located. Conidiomatal wall 15–30 μm wide, composed of thick-walled, dark brown to hyaline cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 4–7 × 5–8 μm, hyaline, enteroblastic, phialidic, doliiform, determinate, smooth-walled. Conidia 10–20 × 3.5–5.5 μm ( ̄x = 15.5 × 5, n = 20), ellipsoidal to ovoid, hyaline, straight or slightly curved, 0–2-septate, constricted at septa, obtuse at both ends, smooth-walled, guttulate.


Material examined: Italy, Province of Ravenna, Zattaglia, on dead twig of Scabiosa sp. (Caprifoliaceae), 30 December 2012, E. Camporesi, IT988 (MFLU 14-0812), living culture, MFLUCC 13-0485, (KUN, HKAS 83971).


Notes: Phoma medicaginis was synonymized under A. medicaginicola var. macrospora by Chen et al. (2015), but this variety together with A. medicaginicola var. medicaginicola are listed as synonyms of Ascochyta medicaginicola in Index Fungorum (2018). We provide a detailed description and photo plate for A. medicaginicola.


Ascochyta medicaginicola (MFLU 14–0812) a Herbarium specimen. b, c Appearance of black conidiomata on the host surface. d Vertical section of conidioma. e, g Section of peridium. f Ostiole. h–k Conidiogenous cells and developing conidia. l–o Conidia. Scale bars: b = 500 μm, c = 100 μm, d = 50 μm, e–g = 25 μm, h–o = 5 μm




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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