Basionym: Sporotrichum isarioides Petch, Trans. Brit. Mycol. Soc. 16: 58 (1931)

Teleomorph state: unknown

Specimens were found on the underside of leaves of forest plants. Hosts are lepidopteran larvae. Mycelia forming a thin layer of hyaline hyphae, from which several white or cream tightly packed synnemata emerge. Synnemata cylindrical, central axis about 50 µm wide, consisting of sterile, fasciculate hyphae, covered over the whole length with numerous conidiogenous structures. Aerial hyphae hyaline, smooth-walled, 1-1.5 µm wide. Conidiogenous cells scattered, arising terminally or laterally from the outer hyphae of synnemata, sometimes integrated in short side branches, usually up to 50 µm long, apical part forming conidia by sympodial growth, consisting of a long, somewhat flexuose, denticulate rachis, den­ticles pointed, rather small. The conidiogenous cell often proliferates near the apex and gives rise to another conidiogenous cell, which in turn may become intercalary. Conidia hyaline, smooth walled, fusiform, with a pointed base, 3 -5 x 1-2 µm. Colonies on PDA are relatively fast-growing, attaining a diam. of 10 mm in 7 d at 25˚C. Colonies white to yellow on PDA. The first collection was from Mo Sing To Plot at Khao Yai National Park in February 2012.

Hoog, G.S. de.(1974).The genera Blastobotrys, Sporothrix, Calcarisporium and Calcarisporiella gen. nov., Studies in Mycology 7: 1-84.