Anamorph state: Hirsutella-like

Specimens were found on the underside of forest bamboo leaves. Hosts were scale insect nymphs (Hemiptera). Stroma covering the host body, ascomata crowded, superficial, ring-like, up to 5 mm diam., yellow mycelium; perithecia flask-shaped, ca. 550-600 µm long (630-680 µm), ca. 350 µm diam. (200-300 µm); asci cylindric up to ca. 400 µm long (580-600 µm) and 5-7.5 µm diam. (5-6 µm) with a distinct, thickened hyaline cap, ca. 5 µm long, ca. 7.5 µm diam.; ascopores whole, filiform, ca. 350 µm long, 1.5-2 µm (450-500 x 1-1.2 µm). Spores will germinate within 24 h on PDA and produce the Hirsutella-like anamorph. The hyaline conidiogenous cells were ca. 25 µm long (14.9-23.8 µm) and ca. 2.5 diam. (2.2-2.7 µm). Conidia form singly, reniform with a truncate attachment point and ca. 5.5 µm long, ca. 2.5 µm diam. Colonies are moderately fast-growing, attaining a diam. of 1 cm after 1 wk at 20 OC on PDA. Colonies white-yellowish when young, turning cream-yellow with age. Collections in Thailand have been made from Doi Inthanon National park in the far north and as far as Kaeng Krachan National Park in the south. Collections have been made throughout the year. To date there have been no records from dicotyledonous leaves

Hywel-Jones, N.L (1997). Torrubiella petchii, a new species of scale insect pathogen from Thailand. Mycological Research 101: 330-332. . Johnson, D., Sung, G.-H., Hywel-Jones, N.L., Luangsa-ard, J.J., Bischoff, J.F., Kepler, R.M. & Spatafora, J.W. (2009). Systematics and evolution of the genus Torrubiella (Hypocreales, Ascomycota). Mycological Research 113: 279-289.