Holotype:
THAILAND, Nakhon Ratchasima Province, Khao Yai National Park, 20 Jul. 2016, A. Khonsanit, holotype BBH 43205, ex-type living culture BCC 82796.
Habitat:
Leaf litter.
Host:
Adult ant.
Description:
Stroma arising from between the head and pronotum of adult worker of Polyrhachis armata, simple, solitary, pale-yellow, yellow-orange to orange, 5-9.7 cm long. Fertile heads terminal, obpyriform, ovoid with yellow to yellow orange to orange, ostioles slightly protruding on the surface of the ascomata, 1-3 × 0.9-2 mm. Perithecia obliquely immersed, ovoid, obclavate, 600-820 × 170-280 μm. Asci hyaline, cylindric, capitate, 415-575 × 5-7 μm. Asci-caps rounded, 4.5-7 × 6-8 μm. Ascospores hyaline, filiform, multi-septate and breaking into 64 part-spores, 415-500 × 1-2 μm. Part-spores hyaline, barrel-shaped, allantoid, cylindrical with truncated apices, 6-18 × 1-2 μm.
Culture characteristics:
Colonies growing on PDA slowly, ca 13.3 mm diam after ca 12 wk at 25 °C, at first white turning to pale-yellow , slightly convex, dense aerial hyphae, yellow synnemata produced after ca 3 wk becoming yellow-orange at the top with white conidia after ca 6 wk. Conidiogenous cells (phialides) pigmented, orange, clavate, obclavate, denticles, stout, protuberant, 6–14 × 2–7 μm. Conidia solitary, single cells, smooth-walled, pigmented, obovoid, cymbiform, 3–10 × 1–2 μm. The underside of the colonies is brown to dark brown.
Reference:
Khonsanit A, Luangsa-ard JJ, Thanakitpipattana D, et al. (2019). Cryptic species within Ophiocordyceps myrmecophila complex on formicine ants from Thailand. Mycological Progress 18: 147–161.
DOI: https://doi.org/10.1007/s11557-018-1412-7Species |
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