Diaporthales » Coryneaceae

Coryneum

 

Coryneum Nees, Das System der Pilze and Schwamme 34 (1817)

Diaporthomycetidae, Diaporthales, Coryneaceae, Coryneum

Index Fungorum number: IF7798; Facesoffungi number: FoF 02129; 79 morphological species (Species Fungorum 2020); 10 species with sequence data, molecular data available for 2 unnamed species.

 

Saprobic on dead wood or pathogenic on plants. Sexual morph: Stromata solitary, erumpent, comprising pseudoparenchymatous cells. Ectostromatic disc well or poorly developed, brown to black, comprising small cells of textura prismatica. Ascomata perithecial, arranged in valsoid configuration, immersed, aggregated, globose to subglobose, coriaceous, brown to black, papillate, ostiolate. Papilla upright, central, broad, sometimes converging, comprising brown cells of textura porrecta. Peridium comprising outer, thick-walled, brown cells of textura angularis and inner, thick-walled, hyaline, compressed cells of textura angularis. Paraphyses broad, cellular, septate, attached to base, longer than asci. Asci 8-spored, unitunicate, ellipsoid to cylindrical, pedicellate, rounded at apex with a J-, apical ring. Ascospores overlapping uni- to biseriate, hyaline or initially hyaline, brown at maturity, irregularly fasciculate, ellipsoid, fusoid or elongate, 1–3-septate, often distoseptate, with end-cells pale brown or hyaline, sometimes end-cells pointed, straight or curved not constricted at the septa, guttulate, smooth-walled. Asexual morph: Coelomycetous. Conidiomata acervular, solitary, erumpent through outer periderm layers of host or immersed, scattered, surface tissues above somewhat dome-shaped. Conidiomatal wall composed of thin-walled, vertically arranged dark brown cells of textura angularis. Conidiophores branched at the base or not, cylindrical to globose, septate or aseptate, hyaline or hyaline at the apex, pale brown at the base. Conidiogenous cells terminal, hyaline, annellidic, cylindrical, sometimes with setulose apical appendages. Conidia hyaline to dark brown, curved, broadly fusiform to cylindrical or clavate, smooth-walled, 4–6-distoseptate, sometimes the apical and basal cell darker than other cells with hyaline tip in apical cell (Hyde et al. 2020).

 

Type species: Coryneum umbonatum Nees, Syst. Pilze (Würzburg): 34 (1816) [1816-17]

 

Notes: Rossman et al. (2015) synonymized Pseudovalsa under Coryneum. The asexual morph is the most common morph seen. There are more than 70 species recorded under Coryneum. However, molecular sequence data are lacking for most species. Wijayawardene et al. (2016), Senanayake et al. (2017), Jiang et al. (2018) and Senwanna et al. (2018) introduced several species providing phylogenetic analyses. Common host genera include Acer, Betula, Castanea, Eucalyptus, Populus, Quercus, Rosa, Rhododendron, Salix, Sorbus, Sambucus, Tilia, and Vitis (Farr & Rossman 2018). Coryneum species are more common in temperate regions than in tropical regions.

Some species of Coryneum cause coryneum-blight, a serious fungal disease that forms holes in leaves, rough areas on fruits and concentric lesions on branches (Senanayake et al. 2018). Many Coryneum species cause cankers in economically important trees and forest trees (Strouts 1972, Gadgil & Dick 2007, Horst 2013, Senanayake et al. 2017). Several Coryneum species occur on chestnut and oak trees (Sutton 1975). Some saprobic species are associated with decaying wood thus contributing to nutrient cycling.

 

 

Species illustrated in this entry:

Coryneum lanciforme (Fr.) Voglmayr & Jaklitsch

 

 

References:

Farr DF, Rossman AY. 2018 – Fungal Databases, U.S. National Fungus Collections, ARS, USDA. Retrieved.

Gadgil PD, Dick M. 2007 – Fungi Silvicolae Novazelandiae: 7. New Zealand Journal of Forestry Science 37, 329–335.

Horst RK. 2013 – Field Manual of Diseases on Trees and Shrubs. 2013th Edition. Springer, Netherlands, 207.

Hyde KD, Norphanphoun C, Maharachchikumbura SSN, Bhat DJ et al. 2020 Refined families of Sordariomycetes. Mycosphere 11, 3051059.

Jiang HB, Phookamsak R, Bhat DJ, Khan S et al. 2018 – Vamsapriya yunnana, a new species of Vamsapriya (Xylariaceae, Xylariales) associated with bamboo from Yunnan, China. Phytotaxa 356, 61–70.

Rossman AY, Adams GC, Cannon PF, Castlebury LA et al. 2015 – Recommendations of generic names in Diaporthales competing for protection or use. IMA Fungus 6, 145–154.

Senanayake IC, Crous P, Groenewald J, Maharachchikumbura SSN et al. 2017 – Families of Diaporthales based on morphological and phylogenetic evidence. Studies in Mycology 86, 217–296.

Senanayake IC, Jeewon R, Chomnunti P, Wanasinghe DN et al. 2018 – Taxonomic circumscription of Diaporthales based on multigene phylogeny and morphology. Fungal Diversity 93, 241–443.

Senwanna C, Hyde KD, Phookamsak R, Jones EBG, Cheewangkoon R. 2018 – Coryneum heveanum sp. nov. (Coryneaceae, Diaporthales) on twigs of Para rubber in Thailand. Mycokeys 43, 75–90.

Strouts RG. 1972 – Canker of cypresses caused by Coryneum cardinale Wag. in Britain. European Journal of Forest Pathology 3, 13–24.

Sutton BC. 1975 – Diploceras, another genetic synonym of Seimatosporium. Transactions of the British Mycological Society 64, 483–487.

Wijayawardene NN, Hyde KD, Wanasinghe DN, Papizadeh M et al. 2016 – Taxonomy and phylogeny of dematiaceous coelomycetes. Fungal Diversity 77, 1–316.

 

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