Fungalpedia – Note 621, Marthomamyces
Marthomamyces L.K. Mathew, Jac. Thomas & N.N. Nair
Citation when using this data: D. S. Marasinghe et al. 2023 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank.
Classification: Asterinaceae, Asterinales, Dothideomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Colonies epiphyllous appearing as blackened areas. Surface hyphae dark brown, branching opposite at acute to wide angles, reticulate, flexuous, appressoria absent. Haustoria develop at the tip of the hyphal branches, reach the stomata, enlarge and divide. Sexual morph: Thyriothecia superficial, dark brown to black, ellipsoidal, oval, X- or Y-shaped, elongated with radiating cells, lacking a stroma, opening by longitudinal slit. Asci bitunicate, 8-spored, subglobose, ocular chamber not observed. Ascospores 1-septum, conglobate, initially hyaline becoming brown at maturity. Asexual morph: Undetermined (Lini et al. 2021).
Notes: Marthomamyces was introduced by Lini et al. (2021) with M. vateriae as the type species. This genus morphologically resembles Echidnodella in having oval, ellipsoidal, X- or Y-shaped thyriothecia, bitunicate, 8-spored asci, conglobate, 1-septum, brown ascospores and surface mycelium with haustoria forming at the tip of the hyphal branches (Hosagoudar et al. 1996; Hosagoudar 2012). However, Marthomamyces differs from other genera of Lembosiaceae by having non-appressorial mycelia with haustoria surrounding the stomata (Lini et al. 2021). We accept this genus in Lembosiaceae based on its morphology of elongated or ellipsoidal thyriothecia with longitudinal slits, subglobose asci and conglobate, 1-septum, brown ascospores.
Type species: Marthomamyces vateriae (Hosag. & Kamar.) L.K. Mathew, Jac. Thomas & N.N. Nair, Asian Journal of Mycology 4 (2): 37 (2021).
Other accepted species: Species Fungorum – search Marthomamyces.
References
Hosagoudar VB 2012 – Asterinales of India. Mycosphere 2:617–852.
Entry by
Diana Sandamali Marasinghe, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand, Mushroom Research Foundation, 128 M.3 Ban Pa Deng T. Pa Pae, A. Mae Taeng, Chiang Mai, 50150, Thailand
Published online 29 August 2023