Pleosporales » Pleosporales, genus incertae sedis » Camarographium

Camarographium stephensii

Camarographium stephensii (Berk. & Broome) Bubák, Ber. dt. bot. Ges. 34: 306 (1916).

≡ Hendersonia stephensii Berk. & Broome, Ann. Mag. nat. Hist., Ser. 2 7: 95 (1851).

           Index Fungorum number: IF 174286; Facesoffungi number: FoF 11786 , Fig. 1

Description:

Saprobic on bark. Sexual morph: Unknown. Asexual morph: Conidiomata 180–500 μm high, 200–550 μm diam., pycnidial, subperidermal, separate, or in groups, immersed to semi-immersed in the bark of the host, globose or slightly depressed, with a central, inconspicuous ostiole. Conidiomatal wall 11–15 μm comprised a thick outer layer of textura angularis with dark brown cells and thinner inner layer of textura angularis-globulosa of yellowish to hyaline, thin-walled cells, which gives rise to conidiogenous cells. Conidiophores reduced to conidiogenous cells. Macroconidiogenous cells 8−15 × 8−10 µm (x̄ = 10.5 × 9.3 µm, n = 10), hyaline, discrete, holoblastic, annellidic, with 1 or 2 percurrent proliferations, broadly ampulliform to doliiform, with thick wall towards the apex. Microconidiogenous cells 14−16 × 2.9−3.8 µm (x̄ = 14.7 × 3.2 µm, n = 10), phialidic, holoblastic, non-proliferating, cylindrical to doliiform. Macroconidia 35−38 × 16−18 µm (x̄ = 37.6 × 17.9 µm, n = 10), initially hyaline, elongated, ellipsoidal to cylindrical, broadly rounded at the apex, rounded and truncate at the base. Microconidia not observed.

Material examined: Belgium, on leaves or dead stem, 2 June 2002, de Meulder H. (BR5020155670823).

 

 

Fig. 1 Camarographium stephensii (BR5020155670823). a–d Herbarium material and appearance of conidiomata on the host surface. e Section through conidioma. f Peridium. g Microconidiogenous cells. h–k Conidiogenesis. l–q Conidia. Scale bars: c = 5000 μm, d = 1000 μm, e = 50 μm, f = 10 μm, g–q = 20 μm.

 

Importance and distribution

Camarographium comprises seven species known on wide range of plants such as Acacia sphaerocephala (Amaranthaceae), Betula papyrifera (Betulaceae), Carpinus betulus (Betulaceae), Cornus kousa (Cornaceae), Pteridium sp. (Dennstaedtiaceae), Scorzonera pusilla (Asteraceae), Stachytarpheta jamaicensis (Verbenaceae), leaves of Atriplex moneta (Amaranthaceae), Clematis vitalba (Ranunculaceae), Prunus domestica (Rosaceae) and Pteris aquilina (Dennstaedtiaceae). Camarographium is reported from Asia (India, Korea, Pakistan, Tadzhikistan, Turkmenistan, Russia, Uzbekistan), Europe (Italy, Yugoslavia, United Kingdom) and North America (Canada, Caribbean).

 

Reference

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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