Claviformispora X. L. Xu & C. L. Yang, 2020

Xu, Xiu-Lan, Yang, Chun-Lin, Jeewon, Rajesh, Wanasinghe, Dhanushka N., Liu, Ying-Gao & Xiao, Qian-Gang, 2020, Morpho-molecular diversity of Linocarpaceae (Chaetosphaeriales): Claviformispora gen. nov. from decaying branches of Phyllostachys heteroclada, MycoKeys 70, pp. 1-17 : 1

Claviformispora X. L. Xu & C. L. Yang gen. nov.

Type species.

Claviformispora phyllostachydis X. L. Xu & C. L. Yang

Etymology.

Name reflects the claviform ascospores.

Description.

Saprobic on dead branches. Sexual morph: Stromata solitary or gregarious, black, erumpent. Ascomata solitary or aggregated, immersed, subglobose, slightly raised blistering areas with a central ostiole with periphyses. Peridium outer cells merging with the host tissues, composed of pale to dark brown cells of textura angularis. Hamathecium comprising hyaline, septate paraphyses, longer than asci, wider at the base, tapering towards the apex. Asci 8-spored, cylindrical to cylindric-clavate, unitunicate, short pedicellate, apically rounded, with a doughnut-shaped, refractive, J- apical ring. Ascospores overlapping uniseriate or 2-seriate, clavated with a thin pedicellate, 1-celled, hyaline, without appendage and refringent bands, smooth-walled. Asexual morph: Undetermined.

Notes.

Claviformispora resembles Neolinocarpon in having immersed ascomata and ostiole with periphyses, but differs in forming aggregated ascomata, cylindric-clavate, short pedicellate asci, clavate ascospores with thin pedicel and without septa-like bands and appendages, whereas the ascospores of Neolinocarpon and Linocarpon ( Linocarpaceae ) species are usually filiform with refringent bands and appendages ( Hyde 1992b, 1997; Konta et al. 2017). The nature of the ascospore appendages appears to be phylogenetically significant for intergeneric delineation as has been seen in other studies ( Poonyth et al. 2000; Jeewon et al; 2003, Thongkantha et al. 2003; Cai et al. 2004; Konta et al. 2017), but this warrants further investigations with more sampling and fresh collections of Neolinocarpon and Linocarpon . Differences in morphology between these genera in Linocarpaceae are summarised in Table 2 .