Coniosporiales » Coniosporiaceae » Coniosporium

Coniosporium olivaceum

Coniosporium olivaceum Link, Mag. Gesell. naturf. Freunde, Berlin 3(1-2): 8 (1809).

           Index Fungorum number: IF 197357; Facesoffungi number: FoF 11920, Fig. 1

Description:

Saprobic on twigs. Sexual morph: Unknown. Asexual morph: Conidiomata 200–300 μm diam., superficial, scattered to grouped, globose to subglobose, olivaceous to dark brown, soft and smooth. Conidiomatal wall not observed. Conidiophores cylindrical, meristematic, unbranched, straight, pale to olivaceous brown, smooth-walled. Conidiogenous cells 5.2−7.5 × 2−7.2 µm (x̄ = 5.3 × 3 µm, n = 10) holoblastic, cylindrical, integrated, determinate, pale to olivaceous brown, smooth. Conidia 20−35 × 12−20 µm (x̄ = 25.2 × 14.7 µm, n = 10), clavate to pyriform, tapered to the base, apex obtuse, muriform, verruculose, 7–8-distoseptate, slightly constricted at the middle septa, with longitudinal or oblique distosepta, olivaceous to dark-brown.

Material examined: The United States, Illinois, Johnson, northeast of Simpson, on decayed wood, 9 April 1969, JL Crane (ILLS00125022).

Fig. 1 Coniosporium olivaceum (ILLS00125022). a–d Herbarium material and appearance of conidiomata on the host. e Squash mount of conidioma. f Conidioma with chains of conidia. g Chains of conidia. h–q Conidia. Scale bars: c = 5000 μm, d = 1000 μm, e = 100 μm, f, g = 50 μm, h–q = 10 μm.

Importance and distribution

There are 102 Coniosporium epithets in Index Fungorum (2022), but several species have been transferred to Apiospora, Arthrinium, Bactrodesmium, Botryobasidium, Coniosporiopsis, Cryptostroma, Gliomastix, Jamesdicksonia, Knufia, Lichenoconium, Lichenodiplis, Melanconium, Microstroma, Monodictys, Pachnocybe, Pirostoma, Xanthoporia and Xanthoriicola. Coniosporium comprises 64 species known on a wide range of plants such as Abies alba (Pinaceae), Arundo donax (Poaceae), Avena sativa (Poaceae), Dactylis glomerata (Poaceae), Hordeum sp. (Poaceae), Lycopersicon esculentum (Solanaceae), Medicago sativa (Fabaceae), Panicum repens (Poaceae), Phaseolus vulgaris (Fabaceae), Phragmites australis (Poaceae) and Pisum sativum (Fabaceae). Coniosporium is reported from Africa (Kenya), Asia (China, Myanmar, Philippines, Russia, Sri Lanka), Europe (Georgia, Greece, Poland, Spain), North America (Canada, the United States) and South America (Argentina).

 

References

Dearness J, Foster WR.  1938 – Coniosporium diseases of apples and crab-apples. Canadian Journal of Research, Section C: Botanical Sciences 16, 574–276.

Ellis MB. 1971 – Dematiaceous Hyphomycetes. Commonwealth Mycological Institute, Kew, UK.

Gaja L. 1911 – In: Monogr. Calic. 26.

Haridas S, Albert R, Binder M, Bloem J et al. 2020 – 101 Dothideomycetes genomes: A test case for predicting lifestyles and emergence of pathogens. Studies in Mycology 96, 141–153. doi: 10.1016/j.simyco.2020.01.003.

Saccardo PA. 1884 – Sylloge Fungorum 3, i–ii, 1–860.

Spegazzini C. 1910 – Contribucion al estudio de los hongos Chilenos. Revista de la Facultad de Agronomía Universidad de La Plata series 2, 6, 1–205.

Turian G. 1977 – Coniosporium aeroalgicolum sp. nov., moisissure Dematiee semi-lichenisante. Berichte der Schweizerischen Botanischen Gesellschaft 87 (1/2), 19–24.

 

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