Chaetosphaeriales » Chaetosphaeriaceae » Pseudolachnella

Pseudolachnella coronata

Pseudolachnella coronata (I. Hino & Katum.) Nag Raj, Coelomycetous Anamorphs with Appendage-bearing Conidia: 725 (1993)

≡ Chaetopatella coronata I. Hino & Katum., J. Jap. Bot. 33: 239 (1958)

Facesoffungi number: FoF 07543

 

Foliicolous, occurring on leaf sheaths. Sexual morph: undetermined. Asexual morph: Conidiomata 140–230 diam., 90–230 µm high, dark brown to black, cupulate, cylindrical or conical in outline, mostly solitary, occasionally gregarious, superficial, subcupulate in section view, unilocular, setose. Conidiomatal setae dark brown for the most part, paler towards the apex, cylindrical with narrow and obtuse apex, septate at upper half or unevenly distributed, often constricted at septum, thick- and smooth-walled, restricted to the periphery of the conidiomata, at first incurved over the conidial hymenium, then divergent. Conidiomatal wall 20–40 µm wide, composed of thick-walled, dark brown to almost black cells of textura intricata to textura angularis in the lower and lateral parts, and gradually merging with thin-walled, pale brown cells of textura angularis towards the conidial hymenium. Conidiophores arising from innermost layers of basal wall, hyaline, cylindrical to subcylindrical, irregularly branched, septate, smooth-walled. Conidiogenous cells 7–16 × 1–2 µm, hyaline, enteroblastic, lageniform to subcylindrical, discrete or integrated, indeterminate, with marked periclinal thickenings in the collarette zone (Fig. 299 l). Conidia 57–95 × 1.7–3.4 µm ( = 81 × 2 µm; n = 50), hyaline, subcylindrical, gradually tapering towards apex, narrow and truncate at base, straight or slightly curved, 7–12-septate, with or without slight constrictions at the septa, smooth-walled, bearing appendages at both ends; apical appendages mostly 2 or 3, occasionally 4, dichotomously, trichotomously or irregularly branched, branches 6–12 µm long; basal appendages single, excentric, branched to 3–5 branches (2–6 µm long).

 

Material examined: Japan, Kyushu, Miyazaki，Takaharu-Tyo, on leaf sheaths of Pleioblastus hindsii (Poaceae), 10 May 1958, H. Kato, (DAOM 215567, part of type of Chaetopatella coronata).

 

Pseudolachnella coronata (DAOM 215567, type) a, b Herbarium package and specimen. c, d, f Appearance of dark brown to black conidiomata on the host. e, j–m, o Conidiophores, conidiogenous cells and developing conidia. g–h Vertical sections of conidiomata. i Section of peridium. n Setae. p–u Conidia. Scale bars c–d, f = 200 µm, e, i, n = 20 µm, g–h = 50 µm, j–l, o–u = 10 µm, m = 5 µm.

 

 

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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