Fungalpedia – Note 2498, Wettsteinina

 

Wettsteinina Höhn.

Citation when using this data: Dong W et al. 2020 – Fungalpedia, Ascomycota.

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

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

Saprobic or hemibiotrophic on submerged wood in freshwater or plant leaves and stems in terrestrial habitats. Sexual morph: Ascomata small-sized, scattered, immersed with a protruding broad papilla. Peridium composed of several layers of large, polygonal, thin-walled cells. Pseudoparaphyses deliquescing at maturity. Asci bitunicate, fissitunicate, subglobose to obpyriform, sessile, with a small ocular chamber, thick-walled. Ascospores 2–4-seriate, broadly clavate, hyaline and become pale brown when mature, septate, smooth, surrounded by a hyaline gelatinous sheath (Zhang et al. 2012b). Asexual morph: Undetermined.

Notes: Wettsteinina is characterized by thick-walled, obpyriform asci, asymmetrical ascospores, and lack pseudoparaphyses at maturity (Zhang et al. 2012b). The placement of Wettsteinina is confused because of lack of sequences of the type species, W. gigantospora. Wettsteinina was placed in Pleosporaceae based on its “pleospora-type” centrum (Shoemaker and Babcock 1987), later excluded from Pleosporaceae based on molecular data of three species, but not assigned to other families (Kodsueb et al. 2006). Wettsteinina was placed in Dothideomycetes genera incertae sedis by Wijayawardene et al. (2018, 2020). The molecular data of freshwater species W. moniliformis Van Ryck. & Aptroot and W. niesslii E. Müll. are unavailable.

Type species: Wettsteinina gigantospora (Rehm) Höhn.

Other accepted species: Species Fungorum – search Wettsteinina.

 

image

 

Figure 1 – Wettsteinina spp. a–e W. niesslii (redrawn from Scheuer (1995), lectotype). a Longitudinal section of ascoma. b Ascus and interascal filaments. c–e Young, mature and senescent ascospores. f–h W. moniliformis (redrawn from (Van Ryckegem and Aptroot 2001), holotype, GENT). f Ascus. g Ascospore. h Pseudoparaphyses filament. Scale bars: a = 50 μm, b–e = 20 μm, f, g = 10 μm, h = 20 μm.

 

References

Kodsueb R, Dhanasekaran V, Aptroot A, Lumyong S, McKenzie EHC, Hyde KD, Jeewon R 2006 – The family Pleosporaceae: intergeneric relationships and phylogenetic perspectives based on sequence analyses of partial 28S rDNA. Mycologia 98:571–583.

Shoemaker RA, Babcock CE 1987 – Wettsteinina. Can J Bot 65:373–405.

Wijayawardene NN, Hyde KD, Lumbsch HT, Liu JK, Maharachchikumbura SSN, Ekanayaka AH, Tian Q, Phookamsak R 2018 – Outline of Ascomycota: 2017. Fungal Divers 88:167–263.

Wijayawardene NN, Hyde KD, Al-Ani LKT, Tedersoo L, Haelewaters D, Rajeshkumar KC, Zhao RL, Aptroot A, Leontyev DV, Saxena RK, Tokarev YS, Dai DQ, Letcher PM, Stephenson SL, Ertz D, Lumbsch HT, Kukwa M, Issi IV, Madrid H, Phillips AJL, Selbmann L, Pfliegler WP, Horváth E, Bensch K, Kirk PM, Kolaříková K, Raja HA, Radek R, Papp V, Dima B, Ma J, Malosso E, Takamatsu S, Rambold G, Gannibal PB, Triebel D, Gautam AK, Avasthi S, Suetrong S, Timdal E, Fryar SC, Delgado G, Réblová M, Doilom M, Dolatabadi S, Pawłowska J, Humber RA, Kodsueb R, Sánchez-Castro I, Goto BT, Silva DKA, de Souza FA, Oehl F, da Silva GA, Silva IR, Błaszkowski J, Jobim K, Maia LC, Barbosa FR, Fiuza PO, Divakar PK, Shenoy BD, Castañeda-Ruiz RF, Somrithipol S, Lateef AA, Karunarathna SC, Tibpromma S, Mortimer PE, Wanasinghe DN, Phookamsak R, Xu J, Wang Y, Tian F, Alvarado P, Li DW, Kušan I, Matočec N, Maharachchikumbura SSN, Papizadeh M, Heredia G, Wartchow F, Bakhshi M, Boehm E, Youssef N, Hustad VP, Lawrey JD, Santiago ALCMA, Bezerra JDP, Souza-Motta CM, Firmino AL, Tian Q, Houbraken J, Hongsanan S, Tanaka K, Dissanayake AJ, Monteiro JS, Grossart HP, Suija A, Weerakoon G, Etayo J, Tsurykau A, Vázquez V, Mungai P, Damm U, Li QR, Zhang H, Boonmee S, Lu YZ, Becerra AG, Kendrick B, Brearley FQ, Motiejūnaitė J, Sharma B, Khare R, Gaikwad S, Wijesundara DSA, Tang LZ, He MQ, Flakus A, Rodriguez-Flakus P, Zhurbenko MP, McKenzie EHC, Stadler M, Bhat DJ, Liu JK, Raza M, Jeewon R, Nassonova ES, Prieto M, Jayalal RGU, Erdoğdu M, Yurkov A, Schnittler M, Shchepin ON, Novozhilov YK, Silva-Filho AGS, Liu P, Cavender JC, Kang Y, Mohammad S, Zhang LF, Xu RF, Li YM, Dayarathne MC, Ekanayaka AH, Wen TC, Deng CY, Pereira OL, Navathe S, Hawksworth DL, Fan XL, Dissanayake LS, Kuhnert E, Grossart HP, Thines M 2020 – Outline of Fungi and fungus-like taxa. Mycosphere 11:1060–1456.

Zhang Y, Crous PW, Schoch CL, Hyde KD 2012b – Pleosporales. Fungal Divers 53:1–221.

 

Entry by

Wei Dong, Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming 650500, China, Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand, Innovative Agriculture Research Center, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Institute of Plant Health, Zhongkai University of Agriculture and Engineering, Haizhu District, Guangzhou 510225, China

 

Published online 22 May 2026

Back to Glossary Index Page