Hemigraphaceae D.Q. Dai & K.D. Hyde, in Dai et al., MycoKeys 369(2): 67 (2018).
MycoBank number: MB 554062; Index Fungorum number: IF 554062; Facesoffungi number: FoF 03910, 9 species.
Biotrophic on lichens. Sexual morph: Ascostromata solitary to gregarious, superficial, stellate, irregularly opening from the centre to margin, conical in section, coriaceous, black to dark brown. Peridium comprises two layers, black and thick-walled cells of textura angularis in outer part, thin and light brown cells of textura angularis at inner layers. Hamathecium comprising few, brown, unbranched, filamentous, septate, cellular pseudoparaphyses. Asci 8-spored, bitunicate, clavate to cylindric-clavate, subglobose, with an ocular chamber and a short pedicel. Ascospores 3-seriate to irregularly arranged, ellipsoid, brown, 1-septate, with larger upper cell and narrower lower cell, smooth-walled. Asexual morph: Undetermined.
Type: Hemigrapha (Müll. Arg.) R. Sant. ex D. Hawksw.
Notes: Dai et al. (2018) studied the syntype of Hemigrapha asteriscus (≡ Melanographa asteriscus), and concluded that it is different from the family type of Parmulariaceae. Phylogenetically (LSU), H. atlantica forms a distint lineage within Asterinales (Ertz and Diederich 2015; Dai et al. 2018; this study). Thus, Hemigraphaceae was established in Asterinales to accommodate a single genus Hemigrapha (Dai et al. 2018).