Pleosporales » Didymellaceae » Didymellocamarosporium

Didymellocamarosporium tamaricis

Didymellocamarosporium tamaricis Wijayaw., Camporesi, Bhat & K.D. Hyde, in Wijayawardene et al., Fungal Diversity: 10.1007/s13225-016-0360-2, [100] (2016)

Index Fungorum number: IF 551772; Facesofungi number: FoF 01469

Etymology: Named after the host genus.

Holotype: MFLU 15-3548.

Saprobic on dead branches and stems of Tamarix sp. (Tamaricaceae). Sexual morph: Undetermined. Asexual morph: Conidiomata 290–330 μm diam., 310–350 μm high, pycnidial, immersed, gregarious, dark brown to black, unilocular. Ostiole papillate, central, single, central, circular. Conidiomata outer wall layer composed of thick-walled, medium brown cells of textura angularis, inner layer with hyaline to sub hyaline cells. Conidiophores reduced to conidiogenous cells. Conidiogenous cells enteroblastic, phialidic, determinate, discrete, smooth, hyaline, formed from the innermost layer of pycnidial wall cells. Conidia 13–21.5 × 7–9.5 μm (x̄ = 16.12 × 8.36 μm, n = 20), oblong, muriform, with 3–5 transverse and 1–3 longitudinal septa, slightly constricted at septa, straight to slightly curved, wide at the center, rounded at both ends, medium to dark brown, smooth-walled.

Culture characteristics: on PDA greyish white from above and light brown from below, with thin mycelium, margin uneven, slow growing, attaining a diam. of 2 cm in 7 days at 18 °C.

Material examined: Italy, Ravenna (RA) Province, Lido di Dante, on twigs of Tamarix sp., 19 February 2013, Erio Camporesi, NNW IT 1070 (MFLU 15-3548, holotype), living cultures MFLUCC 14-0241, GUCC 15


Notes: Four Camarosporium spp. are recorded on Tamarix species, viz. C. tamaricis Hollós on branches of Tamarix africanae (18–24 × 8–10 μm fide Hollós 1906), C. potebniae Sacc. & Trotter (28 × 12 μm fide Saccardo and Trotter 1913) on branches of Tamarix gallicae, C. tamaricum Mekht. (7– 21× 7–17 μm) on branches of Tamarix hohenackeri and an unidentified Camarosporium species from Tamarix sp. (Farr and Rossman 2016). Our collection is morphologically distinct from these species of Tamarix and phylogenetic analyses show it belongs in Didymellaceae. Hence, Didymellocamarosporium is introduced to accommodate our new collection (Wijayawardene et al. 2016).