Microthyriales » Microthyriaceae

Keqinzhangia

Keqinzhangia Z.F. Yu, M. Qiao & R.F. Castañeda, in Zheng et al., Antonie van Leeuwenhoek: 10.1007/s10482-021-01688-3, 3 (2022).

Index Fungorum number: IF 840430; Facesoffungi number: FoF 05738, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.

Saprobic on host. Sexual morph: Unknown. Asexual morph hyphomycetous. Vegetative hyphae cylindrical, branched, microguttulate, septate, hyaline, smooth-walled. Fertile hyphae cylindrical-obclavate, extended inflated subulate to the tip grow, macroguttulate, dark septate, hyaline, smooth-walled. Conidiophores prostrate, not differentiated. Conidiogenous cells holothallic, narrow cylindrical to cylindrical, discrete, indeterminate, forming conidia by random thallic-arthric conidial ontogeny. Conidial secession schizolytic. Conidia thallic-arthric, solitary, polymorphic, cylindrical, cylindrical-obclavate, obclavate, bacilliform, fusiform, sub-oblecythiform or cuneiform, unicellular to septate, hyaline. Chlamydospores globose, terminal, solitary or short catenate, subhyaline (adapted from Zheng et al. 2021).

 Type species: Keqinzhangia aquatica Z.F. Yu, M. Qiao & R. F. Castañeda

Notes: Keqinzhangia is characterised by cylindrical, branched, microguttulate vegetative hyphae, dark septate, hyaline, smooth-walled fertile hyphae, holothallic, narrow cylindrical to cylindrical conidiogenous cells and thallic-arthric, solitary, polymorphic, cylindrical, cylindrical-obclavate conidia. Keqinzhangia is phylogenetically related to Microthyrium and the asexual genus Neoanungitea. Zheng et al. (2021) did not observe any sexual characters from the cultures of K. aquatica hence they could not determine the relationship between Neoanungitea and Keqinzhangia. Keqinzhangia is morphologically and phylogenetically a distinct and well-supported genus in Microthyriaceae. Molecular markers available for Keqinzhangia include ITS and LSU.

 

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