Botryosphaeriales » Botryosphaeriaceae


Endomelanconiopsis Rojas & Samuels, Mycologia 100: 770. (2008).

Index Fungorum number: IF 511837; Facesoffungi number: FoF 07625, 3 morphological species (Species Fungorum 2022), 3 species with molecular data.

Colonies on PDA initially colorless with hyaline immersed hyphae, after 4 d colonies olivaceous in center and concentric rings with irregular shape, after 10 d aerial mycelium dense dark olivaceous or grayor shiny black with little aerial mycelium. Sexual morph: Unknown. Asexual morph: Conidiomata eustromatic, scattered throughout colony, varying from globose to cylindrical, 1–3 cylindrical necks, superficial or immersed in the agar; often cylindrical papillae protruding from the agar in groups of a few. Wall comprising pale brown and black angular cells, becoming hyaline and more hyphal toward the conidiogenous cells. Pycnidial locule convoluted, completely lined with conidiogenous cells. Conidiogenous cells formed from the inner cells all over the conidiomata wall, discrete, determinate, cylindrical, tapered toward the apex, hyaline, holoblastic, rarely with a single percurrent proliferation. Conidia ellipsoidal to limoniform, apex rounded, base flat to rounded, aseptate, hyaline when immature, dark brown with a single longitudinal slit three-quarters of the length of the conidia when mature. Microconidia forming in the same locules as macroconidia from densely arranged, enteroblastic, phialidic conidiogenous cells, appearing to arise from the inner cells of the pycnidial wall. Microconidia ellipsoidal to allantoid, formed on PDA and SNA. Chlamydospores not observed (adapted from Rojas et al. 2008).


Type species: Endomelanconiopsis endophytica E.I. Rojas & Samuels


Notes: Endomelanconiopsis is characterised by eustromatic, scattered conidiomata, convoluted pycnidia completely lined with conidiogenous cells, ellipsoidal to limoniform conidia, and ellipsoidal to allantoid microconidia formed on PDA and SNA. Endomelanconiopsis is unique and differs from Botryosphaeria in having a germ slit in the conidia. Endomelanconiopsis resembles Neodeightonia in conidial morphology but is phylogenetically distinct. Tibpromma et al. (2018) added a third species E. freycinetiae. Endomelanconiopsis is morphologically and phylogenetically a well-defined genus in Botryosphaeriaceae. Molecular markers available for Endomelanconiopsis include ITS, LSU, SSU and TEF-1.


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