Fungalpedia – Note 910, Rhytidhysteron

 

Rhytidhysteron. Speg.

Citation when using this data Manawasinghe IS et al. 2022 (in prep.) – Fungalpedia, Ascomycota.

Index Fungorum, Facesoffungi, MycoBank, GenBank., Fig 1

Classification: Patellariaceae, Patellariales, Incertae sedis, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi

Rhytidhysteron was introduced by Spegazzini (1881) with Rhytidhysteron brasiliense and R. viride. Clements & Shear (1931) named R. brasiliense as the type species (Dayarathne et al. 2020b) and consists of 21 species (Wijayawardene et al. 2020). Previously, this genus was listed under Patellariaceae (Lumbsch & Huhndorf 2010). Rhytidhysteron is placed within Hysteriaceae based on multi-gene phylogenetic analyses (Thambugala et al. 2016, Dayarathne et al. 2020b). This genus is characterized by closed and navicular, irregularly apothecioid ascomata. Ascospores are heavily pigmented and thick-walled (Boehm et al. 2009, Thambugala et al. 2016). For Rhytidhysteron “Aposphaeria-like” or “Diplodia-like” asexual morphs have been reported (Samuels & Müller 1979). 

Type species: Rhytidhysteron brasiliense Speg., Anal. Soc. cient. argent. 12(4): 188 (1881).

Other accepted species: Species Fungorum – search Rhytidhysteron.

 

image

 

Figure 1 – Rhytidhysteron bruguierae (MFLU 21-0174, new host record). a, b Appearance of hysterothecia on Nauclea orientalis. c Vertical section through a hysteriothecium. d Exciple. e Pseudoparaphyses with branched swollen reddish tips. f–h Young and mature asci. i–m Ascospores. Scale bars: a = 1 mm, b = 500 μm, c = 200 μm, d–h, m = 20 μm, i–n = 10 μm.

 

References

Boehm EW, Mugambi GK, Miller AN, Huhndorf SM et al. 2009 – A molecular phylogenetic reappraisal of the Hysteriaceae, Mytilinidiaceae and Gloniaceae (Pleosporomycetidae, Dothideomycetes) with keys to world species. Studies in Mycology 64, 49–83.

Clements FE, Shear CL. 1931 – The Genera of Fungi. HW Wilson Co. Publ., Minneapolis, MN, U.S.A.

Dayarathne MC, Wanasinghe DN, Devadatha B, Abeywickrama et al. 2020b – Modern taxonomic approaches to identifying diatrypaceous fungi from marine habitats, with a novel genus Halocryptovalsa Dayarathne & K.D. Hyde, gen. nov. Cryptogamy. Mycology 41, 21–67.

Lumbsch HT, Huhndorf SM. 2010 – Myconet Volume 14. Part one. Outline of Ascomycota – 2009 Part Two. Notes on Ascomycete Systematics. Nos. 4751-5113. Fieldiana Life and Earth Sciences 1, 1–64.

Samuels GJ, Muller E. 1979 – Life- History Studies of Brazilian ascomycetes. 7. Rhytidhysteron rufulum and the genus Eutryblidiella. Sydowia 32, 277–292.

Spegazzini CL. 1881 – Fungi argentini additis nonnullis brasiliensibus montevideensibusque.

Thambugala KM, Hyde KD, Eungwanichayapant PD, Romero AI et al. 2016 – Additions to the genus Rhytidhysteron in Hysteriaceae. Cryptogamie Mycologie 37, 99–116.

Wijayawardene NN, Hyde KD, Al-Ani LKT, Tedersoo L et al. 2020 – Outline of Fungi and fungus-like taxa. Mycosphere 11, 1060–1456.

 

Entry by

Ishara Sandeepani Manawasinghe, Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, PR of China

Published online 25 April 2022

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