Pseudolachnea
Pseudolachnea Ranoj., Annls mycol. 8(3): 393 (1910)
Facesoffungi number: FoF 07538
Sordariomycetes, Sordariomycetidae, Chaetosphaeriales, Chaetosphaeriaceae
Saprobic on angiosperms and monocots (Nag Raj 1993). Sexual morph: undetermined. Asexual morph: Conidiomata dark brown to black, superficial or subcuticular, scattered or gregarious, at first closed, later opening wide to become shallow-cupulate with incurved margins, flattened, unilocular, setose. Conidiomatal wall consisting of basal stroma and excipulium; basal stroma composed of thick-walled, brown cells of textura angularis in the outer layers, becoming hyaline cells of textura porrecta towards conidial hymenium; excipulum well developed, composed of thick-walled, dark brown to hyaline cells of textura porrecta, giving rise to numerous setae. Conidiomatal setae restricted to the margin of the conidiomata, dark brown, subulate with blunt or acute apices, incurved or divergent, unbranched, smooth-walled. Conidiophores arising from the uppermost cells of the basal stroma and the inner cells of the excipulum, hyaline, cylindrical, branched at the base, septate, smooth-walled. Conidiogenous cells hyaline, enteroblastic, phialidic, usually integrated, smooth-walled. Conidia hyaline, fusiform to naviculate, usually curved, 1-euseptate, thick- and smooth-walled, guttulate, bearing an unbranched, short, cellular, filiform appendage at each end.
Type species: Pseudolachnea hispidula (Schrad.) B. Sutton, Mycol. Pap. 141: 167 (1977)
Notes: The similarities and differences between Pseudolachnea and Pseudolachnella were discussed under notes of Pseudolachnella. Wijayawardene et al. (2017b) estimated five species in Pseudolachnea, of which only P. fraxini Crous and P. hispidula were studied by molecular data (Crous et al. 2012, Hashimoto et al. 2015). A fresh collection on Clematis vitalba in Italy shows similar morphology and phylogeny, as well as conidial dimensions with P. hispidula, and thus it is conspecific with P. hispidula. Pseudolachnea hispidula has been reported from Abies sp. (Pinaceae), Morus bombycis (Moraceae), Phytolacca sp. (Phytolaccaceae), Robinia pseudoacacia (Fabaceae), Salix sp. (Salicaceae), and Sorghum halepense (Poaceae). Our collection is therefore regarded as a new host record.
Distribution: Canada, Czechoslovakia, Italy, Japan, USA, Sweden (Nag Raj 1993, Crous et al. 2012, Hashimoto et al. 2015, this study).
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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