Pleosporales » Didymosphaeriaceae » Pseudopithomyces

Pseudopithomyces rosae

Pseudopithomyces rosae Phukhams., Camporesi & K.D. Hyde, in Wanasinghe et al., Fungal Diversity: 10.1007/s13225-018-0395-7, [43] (2018)

Index Fungorum number: IF554136; Facesofungi number: FoF 03974

Etymology: The specific epithet reflects the host genus Rosa.

Holotype: MFLU 18-0109.

            Saprobic on dried spine of Rosa canina. Sexual morph: Undetermined. Asexual morph: Colonies effuse, dark brown to black. Conidiophores 7–9 × 4–7 μm (x̄ = 7 × 5 μm, n = 30), micronematous, mononemous, closely packed, hyaline, thin-walled, septate, smooth, flexuous. Conidiogenous cells 3–5 × 2–4 μm (x̄ = 4.5 × 3.2 μm, n = 20), holoblastic, terminal, hyaline, globose or subglobose. Conidia 13–30 × 9–20 μm (x̄ = 24 × 14 μm, n = 40), muriform, with 3-transverse septate and 1 longitudinal septum, verruculose to echinulate, ovoid, thin-walled, pale brown to dark brown.

Material examined: ITALY, Forlı`-Cesena Province, Raggio di Santa Sofia, dead aerial spines of Rosa canina L. (Rosaceae), 7 October 2014, Erio Camporesi IT 2155 (MFLU 18-0109, holotype), ex-type living culture, MFLUCC 15-0035.

GenBank Numbers: ITS: MG828953; LSU: MG829064; SSU: MG829168.

Notes: Pseudopithomyces rosae resembles P. chartarum (type sp.) in having micronematous, mononemous conidiophores and muriform conidia. Dimensions of the conidiophores differ as Pseudopithomyces rosae has larger (7–9 × 4–7 μm) conidiophores as compared to P. chartarum (2–5 × 1.5–2.5 μm, Ariyawansa et al. 2015).

 

Figure x. Pseudopithomyces rosae (MFLU 18-0109, holotype). a, b On spines of Rosa canina. c Close up of colonies on surface of host. d–h Developing state of conidia. i–m Conidia. Scale bars: b = 200 µm, c = 100 µm, d–m = 10 µm

 

References:

 

Ariyawansa HA, Hyde KD, Jayasiri SC, Buyck B et al. 2015 Fungal diversity notes 111–252 taxonomic and phylogenetic contributions to fungal taxa. Fungal Diversity 75, 27–274.

Wanasinghe DN, Phukhamsakda C, Hyde KD, Jeewon R et al. 2018 – Fungal diversity notes 709–839: taxonomic and phylogenetic contributions to fungal taxa with an emphasis on fungi on Rosaceae. Fungal diversity 89, 1–236.

 

 

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