Asterina mallotii P.D. Natekar, A.P. Patil, C.R. Patil, M.R. Bhise & S.V. Kambhar

Natekar, Pratik D., Patil, Anjali P., Patil, Chandrahas R., Bhise, Mahendra R. & Kambhar, Sidanand V., 2024, New teleomorphic and anamorphic taxa of Asterinaceous black mildew from Western coast of India, Phytotaxa 642 (1), pp. 73-83 : 76

Asterina mallotii P.D. Natekar, A.P. Patil, C.R. Patil, M.R. Bhise & S.V. Kambhar sp. nov. ( Fig. 2 )

MycoBank number: MB 849597

Etymology:—Based on the name of the host genus.

Holotype:—AMH-10590

Colonies amphiphyllous, sub-dense up to 1 mm in diameter, confluent. Hyphae sub-straight to flexuous, branching alternate at acute to wide angles, loosely to closely reticulate cells, 18–27 × 2–3 µm. Appressoria mostly alternate, 2% unilateral, one-celled, sub-antrorse, variously angular, free, 4–7 × 4–5 µm. Thyriothecia scattered orbicular, up to 110 µm in diameter, stellately dehiscing at the center, margin crenate to fimbriate, fringed hyphae very small; asci globose, octosporous, up to 28 µm in diameter; ascospores, conglobate, brown, oblong, uniseptate, constricted at the septum, wall echinulate, 17–21 × 8–9.5 µm. Pycnothyria scattered, orbicular, same as thyriothecia, up to 105 µm in diameter, stellately dehiscing and widely opened at the centre; conidia numerous, cinnamon brown, pyriform, 15–21 × 9.5–12 µm.

Distribution:— India (Maharashtra).

Material examined:— INDIA. Maharashtra: Hativale, Ratnagiri , on leaves of Mallotus philippensis (Lam.) Müell. Arg. ( Euphorbiaceae ), 16°60’90” N, 73°54’52” E, 41 m, 12 January 2022, Pratik Dilip Natekar- 5333, AMH-10590 (holotype) .

Notes:— Hosagoudar (2012) described Asterina malloticola Hosag., Kamar. & G. Rajkumar on Mallotus philippensis (Lam.) Müll. Arg. and A. mallotigena Hosag. & Sabeena on Mallotus sp. from Kerala ( Table 2 ). In terms of morphology, the current collection differs from these species. As a result, based on host specificity, the current collection is described as a novel species.

Figures

FIGURE 2. Asterina mallotii. A. Infected leaf. B. Mycelial colony. C. Thyriothecium. D. Asci. E. Ascospores. F. Conidia. G. Mycelial colony with thyriothecia. H. Ascus. I. Ascospores. J. Conidia. Illustrated by Pratik D. Natekar.