Hypomyces penicillatus Fig 1-2.

Hypomyces penicillatus Tokiwa & Okuda, sp. nov.

Teleomorph in nature: Subiculum effuse, vivid yellow to yellow (Munsell 5Y8/12-8), covering entire surface of hymenium; hymenial hyphal structures parenchymatous, thick-walled, KOH (-).  Perithecia pale yellow to pastel yellow (Munsell 5Y9/2-6), obpyriform to broadly ellipsoidal, (240-) 265-300 x (260-) 265-310 mm, born in groups half-immersed in the mycelia; papilla conical, (35-) 80-85 x (75-) 105-120 mm; with a flat surface apex bearing an ostiole, 35-65 (-85) mm in width.  Asci cylindrical, (109-) 115-117 (-125) x 5.0-5.5 (-6.5) mm, 8-spored, with a stalk of 10.5-12.0 (-17.5) mm long, forming a pore at the slightly thick-walled apex.  Ascospores hyaline, fusiform, equally two-celled or aseptate, (13.0-) 15.0-17.0 (-19.0) x (3.5-) 4.5-5.5 (-6.0) mm, verrucose with warts of 0.5 mm in diam., apiculate but rounded at both ends; apiculi 1.0-2.0 mm long.

Characteristics in culture: Colonies on MEA, OA or PDA grow rapidly to reach 90 mm in diam. after 7 days at 25oC, floccose, pale yellow, light yellow to vivid yellow, or light orange to brownish orange (Munsell 5Y9/2, 5Y8/10, 5YR8/6-4), margins dentate, odor none, reverse brownish yellow, orange, vivid yellow, or melon yellow (Munsell 10YR6-8/10, 5Y8/14, 10YR8/8), forming a radiate or concentric zonate hyphal network.  Conidiophores born from aerial hyphae, semi-macronematous, septate, slightly thick-walled, 2 to 4 times branched irregularly, (4.0-) 5.0-6.5
mm wide, forming conidiogenous cells at the apex.  Conidiogenous cells born laterally or as a main branch of conidiophores, in a dense penicilli-form, hyaline, (16-) 40-51 (-100) x (2.5-) 3.0-5.0 (-6.5) mm, lanceolate, gradually tapered to the apex of (1.0-) 1.5-2.5 mm in width.  Conidia retrogressively born in imbricate chains from the apex of conidiogenous cells, hyaline, 0-1 (-2) septate, cylindrical to long ellipsoidal, thin-walled, smooth, (12.0-) 14.5-19.0 (-22.5) x (3.0-) 4.0-5.5 (-8.0) mm.  Chlamydospores produced laterally on the substrate hyphae or terminally at the apex of the branches, hyaline, smooth, subglobose, (11.0-) 13.0-17.5 (-21.0) mm in width.


Toshiyuki Tokiwa and Toru Okuda 2005.

Japanese species of Hypomyces and their anamorphs III Mycoscience 46: 294 ? 302