Coniochaetales » Coniochaetaceae

Coniochaeta

Coniochaeta (Sacc.) Cooke, Grevillea 16(no. 77): 16 (1887)

Sordariomycetidae, Coniochaetales, Coniochaetaceae, Coniochaeta

Index Fungorum number: IF 1209; Facesoffungi number: FoF 01333; 98 morphological species (Species Fungorum 2020); 55 species with sequence data.

 

Saprobic in soil, water or on plants litter, dung, pathogenic on plants or pathogens of immunocompromised humans. Sexual morph: Ascomata perithecial or cleistotheciod, solitary to gregarious, dark brown to black or slightly pigmented, superficial or semi-immersed, pyriform and ostiolate or globose and non-ostiolate, setose, hairy or glabrous. Peridium membranaceous to pseudoparenchymatous, rarely coriaceous; composed of some layers with the cells of textura intricata, textura angularis, or less often cephalothecoid. Hamathecium paraphysate or absent. Paraphyses when present many, hyaline, simple, septate, filiform, and evanescent. Asci 4-, 8- to multi-spored, sub-globose or globose, unitunicate, cylindrical, clavate, evanescent, short pedicellate, with a truncate to rounded apex, usually with a conspicuous to indistinct, non-amyloid, apical ring, thin-walled. Ascospores 1-seriate or irregularly arranged, barely ellipsoid to fusoid, broadly ellipsoidal to globose, lenticular or cruciform, with rounded to apiculate ends, compressed on one or both sides; hyaline, brown to dark brown, olive-greenish to dark olivaceous or black, 1-celled, with a cleft germ, smooth walled or pitted. Asexual morph: Hyphomycetous. Belonging to Lecythophora, Verticillium, Paecilomyces, and Cladobotryum. Colonies are often characterized by pink or orange, colony surface more or less smooth, slimy, frequently without aerial hyphae, rarely with short tufts of white hyphae in advancing zone. Conidiophores hyphae variable, frequently closely septate. Conidiogenous cells phialidic, phialides slightly ampulliform, subulate or indistinguishable from a normal hyphal cell, terminal or lateral on hyphae, or intercalary hyphal cells producing phialidic openings directly or on a short extension; collarettes existing but typically hard to distinguish, only occasionally fairly flared. Conidia hyaline, elliptical to oblong-elliptical to reniform, orange or pink in masses, 1-celled, smooth-walled (adapted from Maharachchikumbura et al. 2016).

 

 

Type species: Coniochaeta ligniaria (Grev.) Cooke, Grevillea 16(no. 77): 16 (1887)

 

 

Notes: Phialidic asexual morphs proved to be an informative character to delimit Coniochaetaceae, while the type of ascomata, which can be cleistothecial or perithecial, and the ornamentation of the ascospore walls, proved to have little taxonomic value at the generic level (García et al. 2006). Based on these conclusions, García et al. (2006) segregated several species from Coniochaeta and moved Coniocessia and Coniolariella to Xylariales. Eleven new Coniochaeta species supported by morphology and phylogeny have been introduced (Jiang et al. 2017, Coronado-Ruiz et al. 2018, Nasr et al. 2018, Samarakoon et al. 2018, Wanasinghe et al. 2018, Crous et al. 2019, Harrington et al. 2019, Phookamsak et al. 2019).

 

 

Species illustrated in this entry:

Coniochaeta taeniospora (Sacc.) Friebes, Jaklitsch & Voglmayr

 

 

References:

Coronado-Ruiz C, Avendaño R, Escudero-Leyva E, Conejo-Barboza G et al. 2018 – Two new cellulolytic fungal species isolated from a 19th-century art collection. Scientific Report 7492

Crous PW, Carnegie AJ, Wingfield MJ, Sharma R et al. 2019 – Fungal Planet description sheets: 868–950. Persoonia 42, 291–473

García D, Stchigel AM, Cano J, Calduch M et al. 2006 – Molecular phylogeny of Coniochaetales. Mycological Research 110, 1271–1289

Harrington AH, del Olmo-ruize M, U’Ren JM, Garcia K et al. 2019 – Coniochaeta endophytica sp. nov., a foliar endophyte associated with healthy photosynthetic tissue of Platycladus orientalis (Cupressaceae). Plant and Fungal Systematics 64, 65–79

Jiang YL, Wu YM, Zhang ZG, Kong JH et al. 2017 – Drechslera, Fusariella, Coniochaeta & Pyricularia spp. Nov. from soil in China. Mycotaxon 132, 627–633

Maharachchikumbura SSN, Hyde KD, Jones EBG, McKenzie EHC et al. 2016 – Families of Sordariomycetes. Fungal Diversity 79, 1–317

Nasr S, Bien S, Soudi MR, Alimadadi N et al. 2018 – Novel Collophorina and Coniochaeta species from Euphorbia polycaulis, an endemic plant in Iran. Mycological Progress 17, 755–771

Phookamsak R, Hyde KD, Jeewon R, Bhat DJ et al. 2019 – Fungal diversity notes 929–1035: taxonomic and phylogenetic contributions on genera and species of fungi. Fungal Diversity 95, 1273

Samarakoon MC, Gafforov Y, Liu N, Maharachchikumbura SSN et al. 2018 – Combined multigene backbone tree for the genus Coniochaeta with two new species from Uzbekistan. Phytotaxa 336, 43–58

Wanasinghe DN, Phukhamsakda C, Hyde KD, Jeewon R et al. 2018 – Fungal diversity notes 709– 839: taxonomic and phylogenetic contributions to fungal taxa with an emphasis on fungi on Rosaceae. Fungal Diversity 89, 1–236

 

 

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