Pleosporales » Didymosphaeriaceae » Pseudocamarosporium

Pseudocamarosporium propinquum

Pseudocamarosporium propinquum (Sacc.) Wijayaw., Camporesi & K.D. Hyde, in Wijayawardene et al., Cryptog. Mycol. 35(2): 191 (2014).

≡ Hendersonia propinqua Sacc., Michelia 1(no. 5): 516 (1879).

            Index Fungorum number: IF 550560; Facesoffungi number: FoF 000020, Fig. 1

Description:

Saprobic on Tamarix gallica L. Sexual morph: Unknown. Asexual morph: Conidiomata pycnidial, 200–450 μm diam. × 130–200 μm high (x̄ = 343 × 165 μm, n = 10), solitary, scattered, black, immersed, unilocular, subglobose or irregular in shape, frequently associated with other fungi, ostiolate. Pycnidial wall 10–25 μm (x̄ = 18.9 μm, n = 12), comprising 3–4 layers of hyaline to light brown cells of textura angularis and indistinguishable from the host tissues. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 4–6 × 5–8 μm (x̄ = 12.6 × 7 μm, n = 30), with percurrent phialidic development, smooth, short, hyaline, formed from the inner layer of the pycnidial wall. Conidia 10–15 × 5.5–8 μm (x̄ = 12.6 × 6.5 μm, n = 30), oblong, straight, initially hyaline, aseptate, becoming muriform, with 3 transverse septa and 1–2 longitudinal septa, pale brown to dark brown, smooth-walled.

Material considered: Italy, Province of Forlì-Cesena, Ravaldino in Monte – Forlì, Tamarix gallica L. (Tamaricaceae), 10 January 2014, Erio Camporesi IT 917-CD100 (MFLU 16–0669).

Fig. 1 Pseudocamarosporium propinquum (MFLU 14–0092, epitype).  a

Conidiomata on Salix sp. b Vertical sections of conidiomata. c Conidioma wall. d, e Conidiogenesis and developing conidia attach to conidiogenous cells. f Conidia. Scale bars: b, c = 20 μm, d = 50 μm, e, f = 10 μm.

Importance and distribution

Pseudocamarosporium is reported from a wide range of hosts including Cotinus coggygria (Anacardiaceae), dead branch of Cornus sanguinea (Cornaceae), Quercus cerris (Fagaceae), Pinus nigra (Pinaceae), Ulmus minor (Ulmaceae), stem of Lonicera (Caprifoliaceae), twig litter of Brabejum (Proteaceae), Ptelea (Rutaceae), Picea excelsa (Pinaceae), Prunus persica (Rosaceae), Salix vitellina (Salicaceae) and stems of Tilia (Malvaceae). Pseudocamarosporium is known from Africa, Europe and Russia.

 

Reference

Wijayawardene NN, Hyde KD, Bhat DJ, Camporesi E et al. 2014d – Camarosporium-like species are polyphyletic in Pleosporales; introducing Paracamarosporium and Pseudocamarosporium gen. nov. in Montagnulaceae. Cryptogamie Mycologie 35, 177–198.

 

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