Kirschsteiniothelia phoenicis

Kirschsteiniothelia phoenicis

S.N. Zhang & K.D. Hyde Mycosphere 9(2): 357 (2018)

Classification: Ascomycota-Pezizomycotina-Dothideomycetes-Dothideomycetidae- Kirschsteiniotheliales- Kirschsteiniotheliaceae- Kirschsteiniothelia

Host species: Phoenix paludosa

Holotype: MFLU 18-1053

Known distribution: Ranong Province, Thailand

IF Number: IF554239      Mycobank Number: 554239      FOF Number: FoF04093

Description

Saprobic on Phoenix paludosa Roxb. Sexual morph: Ascomata 135–160 μm high, 183–235 μm diameter (x̅ = 143.8 × 201.7 µm, n = 10), black, scattered, subglobose to globose or slightly conical in appearance, superficial with apex papilla or plane and the base remains immersed, usually flattened. Peridium laterally 24–34 µm wide, composed of 5-6 layers of textura angularis, with dark brown outer layer cells and inner layers pale brown, the cells around the ostiole with small lumina, reduced at the base, of 1-2 layers of cells. Pseudoparaphyses 0.8–1.5 µm wide, hyaline, branched, embedded in a gelatinous matrix. Asci 70–112 × 14–24 µm (x̅ = 84.7 × 19.4 µm, n = 15), 8-spored, bi-or tri- seriate in the middle of ascus, cylindrical-clavate, straight or slightly curved, apically rounded, with a short pedicellate up to 5 µm long. Ascospores 18–27 × 5–7.5 µm (x̅ = 21.3 × 6.6 µm, n = 36), brown, ellipsoid, rounded or slightly pointed at the end, 1-septate, the septum submedian and constricted, the upper cell broader than the lower cell, each cell containing a distinct large guttule, smooth walled, with a mucilaginous sheath. Asexual morph: Undetermined.

Culture conditions: Colonies growing on PDA and MEA dense, reaching 1–1.5 cm diameter after two weeks growing on PDA at 25°C.