Tamaricicola Thambugala, E. Camporesi & K.D. Hyde, gen. nov. Index Fungorum number: IF552087

Etymology: From the Latin cola meaning dwelling on and Tamarici in reference to holotype occurring on Tamarix species

Saprobic on dead herbaceous stems and branches. Sexual morph: Ascomata immersed to partially erumpent, solitary or scattered to gregarious, black, coriaceous, ostiolate. Peridium comprising several layers, outer layers heavily pigmented, thick-walled, comprising blackish to dark brown cells of textura angularis, inner layers composed of lightly pigmented to hyaline, thin-walled cells of textura angularis. Hamathecium composed of septate, branched or not, cellular pseudoparaphyses. Asci (4–)–8 spored, bitunicate, fissitunicate, cylindrical to cylindric-clavate, pedicellate, apically rounded, with a distinct ocular chamber. Ascospores uni- to biseriate, ellipsoidal, muriform, transversely 3-septate, with 1–3 vertical septa, yellowish brown at maturity, smooth-walled, without a mucilaginous sheath. Sexual morph: Coelomycetous. Conidiomata pycnidial, immersed, dark brown to black, subglobose, ostiolate. Conidiomata comprising few layers of dark brown to hyaline cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells phialidic, hyaline, smooth, ampulliform. Conidia ellipsoidal or short-cylindrical, hyaline, rounded at both ends, 1-celled, smooth-walled.

Type species: Tamaricicola muriformis Thambugala, Camporesi & K.D. Hyde

Notes: Tamaricicola is introduced here to accommodate a novel species from Tamarix. Molecular phylogenetic analysis (Fig. 8) shows that Tamaricicola clustered into a distinct clade in Pleosporaceae. Tamaricicola morphologically resembles species of Pleosporaceae in having immersed to partially erumpent ascomata, cylindrical asci, brown or pale brown, muriform ascospores and a coelomycetous asexual morph (Ariyawansa et al. 2015a). However, this genus differs from Pleospora Rabenh. ex Ces. & De Not., the generic type of Pleosporaceae in having immersed ascomata, transversely 3- septate ascospores, lacking a mucilaginous sheath and a phoma-like^ coelomycetous asexual morph.