Acrocalymma ampeli Tennakoon, C. H. Kuo & K. D. Hyde

Acrocalymma ampeli Tennakoon, C. H. Kuo & K. D. Hyde , Fungal Diversity: 17 (2021)

Fig. 6 View Figure 6

Description.

Saprobic on a dead leaf of Livistona chinensis ( Arecaceae ). Sexual morph: Undetermined. Asexual morph: Conidiomata 90–130 × 130–170 µm ( x ̄ = 117 × 153 μm, n = 10), pycnidial, dark brown to black, solitary or clustered, immersed to semi-immersed, erumpent through host surface, unilocular, globose to subglobose, ostiolate. Conidiomatal wall 17–23 μm wide ( x ̄ = 19 μm), composed of 4–5 layers of cells with textura angularis, cells towards the inside hyaline, and at the outside light brown. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 5–8 × 4–7 µm ( x ̄ = 6.7 × 5.8 μm, n = 20), hyaline, ampulliform to doliiform, phialidic, smooth-walled. Conidia 16–20 × 5–6 µm ( x ̄ = 17.5 × 5.5 μm, n = 20), hyaline, cylindrical to fusoid, apex obtuse, protuberant and with a rounded hilum at base, aseptate, straight, thin-walled, with flaring mucoid apical appendage at lower end (3–4 µm diam.), visible in water mounts.

Material examined.

China • Yunnan Province, Kunming , on a dead leaf of Livistona chinensis ( Arecaceae ), 15 June 2017, D. S. Tennakoon, DST 016 ( SZU 25-013 , new host record) • ibid. 17 August 2017, DST 011 ( SZU 25-014 ) .

Known hosts.

Livistona chinensis and Ficus ampelas ( Tennakoon et al. 2021; this study).

Known distribution.

China ( Tennakoon et al. 2021; this study).

Notes.

Acrocalymma ampeli was introduced by Tennakoon et al. (2021) from dead leaves of Ficus ampelas ( Moraceae ). The morphology of our collection ( SZU 25-013 and SZU 25-014 ) resembles A. ampeli by having pycnidial, dark brown to black, immersed to semi-immersed conidiomata, ampulliform to doliiform conidiogenous cells, and aseptate, cylindrical to fusoid-shaped conidia ( Tennakoon et al. 2021). Multi-gene phylogeny also indicates that our collection clusters with A. ampeli isolates ( MFLUCC 20-0159 and NCYUCC 19-0288 ) in a well-supported clade (100 % ML, 1.00 BYPP). Therefore, based on morphological similarities and phylogeny support, we identified our collection as A. ampeli from a different host ( Livistona chinensis ) in China.