Pleosporales » Lophiostomataceae

Coelodictyosporium

Coelodictyosporium Thambug. & K.D. Hyde, in Thambugala et al., Fungal Diversity 74: 218 (2015)

Index Fungorum number: IF 551286; Facesofungi number: FoF 00801, 00802

Etymology: In reference to a new coeleomycetous genus with Dictyosporium-like spores

Saprobic on dead branches in terrestrial habitats. Sexual morph Sexual morph: (from Thambugala et al. (2015): Ascomata solitary or gregarious, immersed, coriaceous, black, globose to subglobose, ostiolate, apex well-developed. Ostiole crest-like, central, broadly papillate, with a pore-like opening. Peridium wider at the apex and thinner at the base, composed of two strata, outer stratum comprising dark brown to black, somewhat flattened cells of textura angularis, fusing and indistinguishable from the host tissues, and inner stratum comprising 2–3 layers of brown to lightly pigmented cells of textura angularis. Hamathecium comprising 1.5–3 μm wide, numerous, aseptate, unbranched, cellular pseudoparaphyses, anastomosing above the asci, embedded in a gelatinous matrix. 8-spored, bitunicate, fissitunicate, cylindric-clavate, with a long pedicel, apically rounded, with an ocular chamber. Ascospores uni to bi-seriate, partially overlapping, yellowish to brown, ellipsoid to fusiform, muriform, 5–6 transversely septate, with 1–2 vertical septa, deeply constricted at the middle septum, upper part slightly wider, with terminal appendages and surrounded by a thick mucilaginous sheath. Asexual morph: Colonies growing on dead branches. Conidiomata pycnidial, on the upper surface of stems, solitary, scattered, superficial, globose to subglobose, black. Conidiomata wall thin at the apex, base a single layer, composed of thin-walled, brown to black cells of textura angularis. Conidiogenous cells holoblastic, cupshaped or doliiform, integrated, smooth, brown. Conidia digitate, medium brown, complanate, dictyosporous, regularly consisting of 6–8 rows of cells, each row comprising 5–7 cells (Liu et al. 2015, Thambugala et al. 2015).

Type species: Coelodictyosporium pseudodictyosporium (Qing Tian, Camporesi & K.D. Hyde) Thambug. & K.D. Hyde, in Thambugala et al., Fungal Diversity 74: 218 (2015)

Lophiostoma pseudodictyosporium Qing Tian et al., in Liu et al., Fungal Diversity 72(1): 114 (2015)

Notes: Liu et al. (2015) introduced Lophiostoma pseudodictyosporium Qing Tian et al. as a new coelomycetous species belonging in Lophiostomataceae. Thambugala et al. (2015) showed it groups with one of their new strains and introduced it as a new genus, Coelodictyosporium. In conidial morphology, Coelodictyosporium resembles Psammina (Sutton 1980), but Psammina was treated as hyphomycetous by Earland-Bennett and Hawksworth (1999, 2005), although Sutton (1980) treated Psammina as coelomycetous (see notes under Psammina) (Wijayawardene et al. 2016)

 

References:

 

Earland-Bennett PM, Hawksworth DL 1999 – Observations on the genus Psammina, including the description of two new algicolous and lichenicolous species. Lichenologist 31, 579–586.

Earland-Bennett PM, Hawksworth DL 2005 – The first lichen-forming species of Psammina, P. palmata sp. nov., with notes on the status of Cheiromycina and Pycnopsammina. Lichenologist 37, 191–197.

Liu JK, Hyde KD, Jones EG, Ariyawansa HA et al. 2015 – Fungal diversity notes 1–110: taxonomic and phylogenetic contributions to fungal species. Fungal diversity 72, 1–97.

Sutton BC 1980 The Coelomycetes. Fungi imperfecti with pycnidia, acervuli and stromata.

Thambugala KM, Hyde KD, Tanaka K, Tian Q et al. 2015 – Towards a natural classification and backbone tree for Lophiostomataceae, Floricolaceae, and Amorosiaceae fam. nov. Fungal Diversity 74, 199–266.

Wijayawardene NN, Hyde KD, Wanasinghe DN, Papizadeh M et al. 2016 Taxonomy and phylogeny of dematiaceous coelomycetes. Fungal diversity 77, 1316.

 

Last Update: 13 April 2021

 

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