Cylindroconidiis H. Zhang & X.D. Yu, 2018

Yu, Xian-Dong, Dong, Wei, Bhat, D. Jayarama, Boonmee, Saranyaphat, Zhang, Di & Zhang, Huang, 2018, Cylindroconidiis aquaticus gen. et sp. nov., a new lineage of aquatic hyphomycetes in Sclerococcaceae (Eurotiomycetes), Phytotaxa 372 (1), pp. 79-87 : 83

Cylindroconidiis H. Zhang & X.D. Yu , gen. nov.

Index Fungorum number: IF555307, Facesoffungi number: FoF04855

Etymology: cylindro = cylindratis, referring to the cylindrical conidia; conidiis means conidia.

Saprobic on decaying wood submerged in freshwater. Sexual morph: Undetermined. Asexual morph: Colonies superficial, effuse, gregarious, hairy, brown to dark brown. Mycelium partly immersed, composed of septate, smooth hyphae. Conidiophores macronematous, mononematous, cylindrical, erect, smooth, unbranched, septate, thin-walled, brown to olive grey. Conidiogenous cells holoblastic, polyblastic, integrated, determinate, terminal or intercalary. Conidia acrogenous and pleurogenic, cylindrical to oblong, straight, euseptate, pigmented, solitary, smooth, thin-walled.

Type species: Cylindroconidiis aquaticus X.D. Yu & H. Zhang

Notes: Our new isolate clustered to Rhopalophora and Fusichalara minuta within the family Sclerococcaceae based on phylogenetic analyses ( FIGURE 1). It can be easily distinguished from the two genera with polyblastic conidiogenous cells, while the latter two have phialidic conidiogenous cells ( Réblová et al. 2016). Cylindroconidiis is similar to Sclerococcum in having polyblastic conidiogenous cells, but Cylindroconidiis possesses long conidiophores, and cylindrical and solitary conidia, whereas Sclerococcum has rather short conidiophores and irregularly subglobose to ellipsoid conidia which arise in chains ( Hawksworth 1975). With unique conidiogenesis and distinct conidial characters, our isolate cannot be placed in any known genus within the family Sclerococcaceae . Thus, a new genus is established to accommodate this taxon.