Myriangiales » Myriangiaceae

Dictyocyclus

Dictyocyclus Sivan., W.H. Hsieh & Chi Y. Chen, Linn. Soc. Bot. 126(4): 324 (1998).

      Index Fungorum number: IF 27900; Facesoffungi number: FoF 06544, 1 morphological species (Species Fungorum 2022), no molecular data available.

Foliar epiphyte on the lower surface of leaves. Sexual morph: Ascostromata superficial, scattered, solitary, immersed, black, discoid, multi-loculate, opening by irregular fissures; locules arranged around a raised, sterile, central column of ascostromata, ostiolate. Ostiole minute. Paraphyses absent. Cells of the ascostromata comprising a single stratum of more or less thick-walled textura angularis brown cells. Asci 8-spored, bitunicate, fissitunicate, obovoid, thick-walled, apedicellate, apically rounded. Ascospores hyaline, obovoid, partially overlapping, with broadly to narrowly rounded ends, muriform, 3–5-transverse septa, one longitudinal or oblique septum in each of the end cells, smooth-walled, lacking a mucilaginous sheath. Asexual morph: Unknown (adapted from Dissanayake et al. 2014).

Type species: Dictyocyclus hydrangeae Sivan. W.H. Hsieh & Chi Y. Chen

Notes: Dictyocyclus is an epifoliar genus and is characterised by muriform ascospores with 3–5 transverse septa, and one longitudinal or oblique septum in each of the end cells (Dissanayake et al. 2014). Dictyocyclus was placed in Myriangiaceae based only on morphological study. DNA sequence data is needed to confirm the taxonomic placement of this genus.

 

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