Strigulales » Strigulaceae


Strigula Fr., Syst. mycol. (Lundae) 2(2): 535 (1823)

= Discosiella Syd. & P. Syd., Leafl. of Philipp. Bot. 5: 1546 (1912)

Facesoffungi number: FoF 07706

Dothideomycetes, Dothideomycetidae, Strigulales, Strigulaceae


Lichenized on leaves or more rarely on bark and rocks (Hyde et al. 2013). Sexual morph: see Hyde et al. (2013). Asexual morph: Conidiomata dull brownish black to glistening black, pycnidial, scattered to gregarious, epidermal, immersed to erumpent, unilocular, glabrous, clypeate, ostiolate. Ostiole single, with an outer clypeus covering the hymenium. Conidiomatal wall composed of thick-walled, dark brown to black, leathery cells of textura epidermoidea to textura intricata in outer clypeus, becoming membranous, gelatinous, thin-walled, hyaline cells of textura angularis in inner layers. Conidiophores reduced to conidiogenous cells. Macroconidiogenous cells arising from palisade-like cells of the inner wall layer of conidiomata, hyaline, enteroblastic, ampulliform, lageniform, subcylindrical or conical, often with a broad inflated venter and a narrow attenuated neck, smooth-walled, with several percurrent proliferations. Macroconidia hyaline, ellipsoid to fusiform, or subcylindrical to cylindrical, 0–1-septate, smooth-walled, guttulate, bearing an unbranched, attenuated, mucoid appendage at each end. Microconidiogenous cells hyaline, lageniform to cylindrical, smooth-walled. Microconidia hyaline, ellipsoid, unicellular, smooth-walled (adapted from Nag Raj 1993).


Type species: Strigula smaragdula Fr., Linnaea 5: 550 (1830)


Notes: The members of Discosiella are lichenized mycobionts (Nag Raj 1981). Nag Raj (1981, 1993) linked Discosiella species to sexual morph Strigula based on both conidiomata and perithecia consistently occurring on same substrate. In later studies, Discosiella species have been often reported associated with Strigula (Aptroot et al. 1997, 2008, Lücking 2008). Jiang et al. (2016, 2017) introduced several new taxa in Strigula with an asexual morph, based on molecular data. These studies provided more evidence for sexual and asexual morph connection between Discosiella and Strigula. Therefore, Discosiella and Strigula are considered as taxonomic congeneric. Strigula is a lichenized genus containing more than 70 species (Lücking 2008, Hyde et al. 2013). Only four taxa were recognized in Discosiella (Nag Raj 1993). Because Strigula is a well known genus and it has priority, Discosiella is reduced to a synonym of Strigula. However, it should be noted that if the type species of Discosiella is found not to be congeneric with Strigula, it remains available for use.





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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