Akanthomyces pyralidarum Aini, Luangsa-ard, Mongkolsamrit & Thanakitpipattana, 2020

Aini, Arifah Nur, Mongkolsamrit, Suchada, Wijanarka, Wijanarka, Thanakitpipattana, Donnaya, Luangsa-ard, J. Jennifer & Budiharjo, Anto, 2020, Diversity of Akanthomyces on moths (Lepidoptera) in Thailand, MycoKeys 71, pp. 1-22 : 1

Akanthomyces pyralidarum Aini, Luangsa-ard, Mongkolsamrit & Thanakitpipattana sp. nov. Figure 3

Type.

Thailand. Kanchanaburi Province, Thung Yai Naresuan Wildlife Sanctuary, Krathon Ruesi Nature Trail; 14°746'N, 98°625'E; on adult moth; 11 Dec 2007; KT, SM, RR, B. Thongnuch (BT) (holotype BBH23823 dried culture, ex-type living culture BCC 28816). GenBank: ITS = MT356080, LSU = MT356091, TEF = MT477982, RPB1 = MT478000, RPB2 = MT478007.

Etymology.

Refers to the host ( Pyralidae , Lepidoptera ) of the fungus.

Description.

Teleomorph: Adult moth attached on the undersides of dicotyledonous leaf covered by white to cream mycelium (OAC816). Stroma arising from host body and wings, white to cream (OAC816), cylindrical. Perithecia superficial, crowded at the tip of stroma or growing directly from mycelium that covers the host body, few to numerous, ovoid to obpyriform, (290-)342-580(-650) × (150-)186-291(-340) µm. Asci cylindrical, the bottom of asci thicker than the middle part, (170-)222-329(-360) × (2-)2.5-3.3(-4) µm. Ascospores hyaline, filiform, multi-septate, discharged into part-spores, (5-)5.9-9.4(-12) × 1 µm.

Culture characters.

Colonies on PDA growing with a diameter of 23-28 mm in 14 days, white (OAC909), circular, flat, entire. Colony reverse pale yellow (OAC856) at the center. Conidia and reproductive structures not observed. Colonies on OA growing with a diameter of 27-30 mm in 14 days, white (OAC909), circular, flat, entire. Colony reverse uncolored. Conidia and reproductive structures not observed.

Distribution.

Thailand, known from various national parks throughout the country.

Ecology.

All specimens are found on the underside of leaves of plants.

Additional specimens examined.

Thailand. Chiang Mai Province, Huai Nam Dang National Park, Pong Dueat Pa Pae Geyser; 19°121'N, 98°943'E; on adult moth; 5 Sep 2008; KT, WC, PS, AK, SM (BBH 24623, BCC 32191). Phetchabun Province, Nam Nao National Park, Headquarter Nature Trail; 16°768'N, 101°671'E; on adult moth; 24 Nov 2009; KT, TC, AK (BBH 27293, BCC 40869). Kanchanaburi Province, Thung Yai Naresuan Wildlife Sanctuary, Thi Khong Protect Forest Unit; 14°746'N, 98°625'E; on adult moth; 12 Dec 2007; KT, SM, RR, BT (BBH 23778, BCC 29197).

Notes.

Akanthomyces pyralidarum is found only in its teleomorph state. This species differs from Akanthomyces noctuidarum by having smaller perithecia (290-650 × 150-340 µm) than A. noctuidarum (530-1000 × 290-425 µm).

Figures

Figure 3. Akanthomyces pyralidarum (BBH 23823, BCC 28816) A fungus on adult moth B-F perithecia G, H asci I tip of ascus with immature ascospore J tip of ascus with mature ascospores K ascospores L, M culture on PDA 14 days M reverse N, O culture on OA 14 days O reverse P culture on OA 28 days. Scale bars: 1 cm (A, L, M, N, O, P); 1 mm (B); 500 µm (C, D, E); 100 µm (F); 10 µm (G, H); 5 µm (I, J, K).