Neodidymelliopsis Qian Chen & L. Cai, Stud. Mycol. 82: 207 (2015)
Facesoffungi number: FoF 07518
Dothideomycetes, Pleosporomycetidae, Pleosporales, Didymellaceae
Saprobic on terrestrial plants or from soil in desert (Chen et al. 2015, 2017) Sexual morph: see Chen et al. (2015). Asexual morph: Conidiomata dark brown to black, pycnidial, solitary to gregarious or confluent, immersed to semi-immersed or erumpent, globose to subglobose, unilocular or multilocular, glabrous, ostiolate. Ostiole single, papillate or with elongate necks, centrally or laterally located. Conidiomatal wall composed of thick-walled, dark brown to hyaline cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells formed in the inner cavity of conidiomata, hyaline, enteroblastic, phialidic, doliiform to ampulliform, determinate, smooth-walled. Conidia hyaline to pale brown or pale yellowish, variable in shape, ellipsoidal to ovoid, or cylindrical, allantoid, 0–1-septate, smooth-walled, guttulate. Chlamydospores present or absent, brown, globose to oval, intercalary or terminal, single or in chains, sometimes dictyochlamydospores (Chen et al. 2015).
Type species: Neodidymelliopsis cannabis (G. Winter) Qian Chen & L. Cai, Stud. Mycol. 82: 207 (2015)
Notes: Neodidymelliopsis species have been reported from Canada, Israel, Italy, Iran, Russia, the Netherlands, and UK, and are associated with many host plants viz. Berberidaceae, Combretaceae, Juglandaceae, Moraceae, Myrtaceae, Polemoniaceae, Ranunculaceae, Rutaceae, Sapindaceae and Urticaceae (Chen et al. 2015, 2017, Hyde et al. 2016b, 2017, 2018, Akram et al. 2017). Ten taxa are listed in Index Fungorum (2019). Phylogenetic analyses based on LSU, ITS, tub2 and rpb2 sequence data shows that N. farokhinejadii (SCUA-4-And-Con, SCUA 6-EZ-Jug, SCUA-8-Ahv-Cit), N. longicolla (CBS 382.96, UTHSC: DI16-322) and N. ranunculi (MFLUCC 13-0490) clustered together with high support. Morphologically, N. longicolla and N. ranunculi share similar form of conidiomata and conidia (pycnidial conidiomata, hyaline to brown, ellipsoidal to cylindrical, 1-septate conidia). The differences between these two taxa are conidial dimension and ostiole. Neodidymelliopsis longicolla has cylindrical, much longer ostiole and larger conidia than N. ranunculi (12–15(–16.5) × 4–7 μmvs. 7.5–10 × 3–5 μm). It should be noted that in some coelomycetes, the conidiomata that develop in culture differ from those occurring in nature, and the conidia dimensions have also proven not to be very reliable (Cole and Kendrick 1981, Verkley et al. 2014). Therefore, N. farokhinejadii, N. longicolla and N. ranunculi are considered conspecific and the first two names are reduced to synonyms of N. ranunculi. We also introduce an additional strain of N. negundinis from Sophora japonica in Italy and provide an improved photo plate for this species.
Distribution: Canada, Israel, Italy, Netherlands, UK, USA, (Chen et al. 2015, 2017, Hyde et al. 2016, Valenzuela-Lopez et al. 2018).
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.