Leptoguignardia E. Müll., Sydowia 9(1-6): 216 (1955)
Index Fungorum number: IF 2777; Facesoffungi number: FoF xxx, 2 morphological species (Species Fungorum 2021), molecular data unavailable.
Hemibiotrophic or saprobic on petioles. Sexual morph: Ascostromata black, scattered, clustered or fusing in groups of 2–3, initially immersed, becoming erumpent but still under host tissue, ovoid to globose, coriaceous. Papilla central, ostiole with a pore. Pseudoparaphyses sparse, hyphae-like, not commonly observed in herbarium material. Peridium comprising small heavily pigmented thick-walled cells of textura angularis. Asci 8–spored, bitunicate, fissitunicate, obclavate to cylindrical with a short blunt pedicel, ocular chamber not clear. Ascospores hyaline, 2–septate, fusiform, asymmetrical, central cells widest, ends cells longer and tapering, smooth-walled. Asexual morph: “Dothichiza”-like morph forming on same tissue. Pycnidia black, scattered, or fusing in groups or with locules, immersed, becoming erumpent, but still under host tissue, ovoid, coriaceous, scattered amongst locules. Conidiogenous cells hyaline, cylindrical, holoblastic. Conidia hyaline, 1–septate, septum nearer to apex, slightly constricted, ovoid with round ends (Adapted from Liu et al. 2012).
Type species: Leptoguignardia onobrychidis E. Müll.
Notes: Leptoguignardia was introduced by Müller (1955) with L. onobrychidis as type species. Leptoguignardia is characterized by black, scattered, clustered ascostromata, hyphae-like sparse pseudoparaphyses, obclavate to cylindrical asci, hyaline, 2–septate, fusiform ascospores. Liu et al. (2012) referred Leptoguignardia to Botryosphaeriaceae based on its ascomata and ascal characters. Molecular data is lacking for this genus. Leptoguignardia is currently accomodated in Botryosphaeriaceae, genera incertae sedis.