Type: Nigelia_aurantiaca Luangsa-ard, Thanakitpipattana & Tasanathai. Etymology: Named after Dr. Nigel Hywel-Jones, who did pioneering work on invertebrate-pathogenic fungi research in BIOTEC. Description: Stromata robust, solitary or several, simple or branched. Stipe tough, mustard yellow, orange to reddish brown, cylindrical at the bottom and enlarging in the fertile part. Fertile part predominantly cylindrical, clavate to irregularly shaped. Perithecia completely immersed in the stroma with distinctly dark ostioles protruding from the stromatic surface in a manner making the surface appear to be spinose. Perithecia more or less separate or compactly aggregated, obliquely oriented to the stromatic surface, ovoid with curved, dark ostiole. Asci cylindrical, 8-spored. Ascospores filiform, septate, whole or fragmenting into part-spores, hyaline. In PDA cultures, conidiophores are verticillately or irregularly branched, bearing mostly solitary conidiogenous cells. Phialides variable in shape and size, smooth-walled, consisting of a cylindrical to globose basal portion tapering into a long neck or may proliferate and form 2–3 lateral necks. Host: Lepidoptera larva.

Reference: Luangsa-ard JJ, Mongkolsamrit S, Thanakitpipattana D, et al. (2017). Clavicipitaceous entomopathogens: new species in Metarhizium and a new genus Nigelia. Mycological Progress 16: 369–391. https://doi.org/10.1007/s11557-017-1277-1