Acanthohelicospora guianensis

Acanthohelicospora guianensis (Linder) Y.Z. Lu & K.D. Hyde

≡Helicosporium guianense Linder, Annals of the Missouri Botanical Garden 16: 280 (1929)
≡Helicosporium guianensis Linder (1929)

Linder, D.H. 1929. A monograph of the helicosporous Fungi Imperfecti. Annals of the Missouri Botanical Garden. 16:227-348

Colonies effuse, short-cottony, “oil yellow.” The conidiophores at first simple and erect, later becoming bent, not branching above, somewhat loosely branched below and occasionally anastomosing, up to 480 um long, 3.6-4.5 um in diameter below, slightly tapering upwards to a rounded point.

Conidia borne pleurogenously, at first on minute hyaline teeth, later on bladder-like projections which may continue growth, enlarge and become somewhat sympially branched and dilute fuscous, yellow in mass, hygroscopic, 3 – 3 1/2 times coiled when tightly wound, the child then 21.6 um in diameter, larger when uncoiled, the filament 1.4-1.6 um in diameter.

See references below for images.

References

Hsieh S-Y, Goh T-K, Kuo C-H. 2021. New species and records of Helicosporium sensu lato from Taiwan, with a reflection on current generic circumscription. Mycol Progress. 20:169–190, doi: 10.1007/s11557-020-01663-8

Lu, YZ; Liu, JK; Hyde, KD; Jeewon, R; Kang, JC; Fan, C; Boonmee, S; Bhat, DJ; Luo, ZL; Lin, CG; Eungwanichayapant, PD. 2018. A taxonomic reassessment of Tubeufiales based on multi-locus phylogeny and morphology. Fungal Diversity. 92:131-344

Zhao, G., Liu, X., and Wu, W. 2007. Helicosporous hyphomycetes from china. Fungal Diversity. 26, 2, 313-524.