Mycosphaerellales » Mycosphaerellaceae


Helicomina L.S. Olive, Mycologia 40(1): 16 (1948).

Index Fungorum number: IF 8474; Facesoffungi number: FoF 08614, 8 morphological species (Species Fungorum 2022), no molecular data available.

Parasitic on leaves of Caperonia castaneaefolia. Sexual morph: Unknown. Asexual morph: Chiefly hypophyllous, producing sooty spots or becoming effuse, internal mycelium intercellular, without haustoria. Conidiophores appearing in clusters of several through the stomates, simple or few-branched, brown, mostly 2–12 septate, bearing the conidia both terminally and laterally. Conidiogenous cells not seen. Conidia straight, curved or up to 11/3 times coiled, (1–)3(–7) septate, pale brown with a small hilum at the proximal end, the conidia germinating at both ends and sometimes laterally (Adapted from description of Helicomina caperoniae in Olive 1948).

 Type species: Helicomina caperoniae L.S. Olive

Notes: Helicomina is characterised by hypophyllous, sooty spots, simple or few-branched conidiophores and conidia that are mostly 3-septate, and pallid brown with small hila. Helicomina is a doubtful genus in Mycosphaerellaceae. Fresh collections with DNA sequence data are needed to confirm the taxonomic placement of Helicomina.


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