Asteridiella leeicola Hansf., Sydowia

Natekar, Pratik D., Patil, Anjali P., Patil, Chandrahas R., Bhise, Mahendra R. & Kambhar, Sidanand V., 2024, Two new records of Meliolaceous black mildew fungi from India, Phytotaxa 641 (1), pp. 73-77 : 74

Asteridiella leeicola Hansf., Sydowia 11 (1–6): 48, 1958 ( Fig. 1 )

MycoBank number: 293069

Colonies epiphyllous, sub-dense, up to 2 mm in diameter. Hyphae flexuous to wavy, branching opposite at wide angles, closely to loosely reticulate; cells 20–30.5 × 5.5–7.5 µm. Appressoria alternate, lateral, antrorse, curved to straight, 15– 23 × 13–16.5 µm; stalk cells cuneate to cylindrical, 3.5–6 µm long; head cells ovate, globose to cylindrical, entire to angular, 11–17 × 13–16.5 µm. Phialides numerous, borne on a separate mycelial branch rarely mixed with appressoria, opposite to alternate, ampulliform, 15–23 × 7.5–9.5 µm. Perithecia few, scattered, up to 90 µm in diameter; ascospores cylindrical 4-septate, slightly constricted at septa, 30–34 × 9–16 µm.

Material examined:— INDIA. Maharashtra:Kharepatan,Sindhudurg, on living leaves of Leea indica ,16°55’61.5” N, 73°62’83.7” E, 108 m, 6 December 2021, Pratik Dilip Natekar-5065, AMH-10597.

Known distribution:— Philippines and India.

Notes:— Asteridiella leeicola was previously only recorded on Leea sp. from Philippines ( Hansford 1961). Based on the literature ( Hansford 1961, Hosagoudar 1996, Hosagoudar & Agarwal 2008) the present collection on Leea indica is a new host record and this taxon is reported from India for the first time.

Figures

FIGURE 1. Asteridiella leeicola. A. Infected leaf. B. Mycelial colony. C. Appressoriate mycelium. D. Phialides. E. Perithecia. F. Ascospores.