Fungalpedia – Note 875, Longivarius

 

Longivarius W. Dong, H. Zhang & K.D. Hyde

Citation when using this data: Dong W et al. 2021 (in prep.) – Fungalpedia, Ascomycota.

Index Fungorum, Facesoffungi, MycoBank, GenBank.

Classification: Annulatascaceae, Annulatascales, Diaporthomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi

Etymology – in reference to its long neck and various colour of ascospore cells

Saprobic on submerged wood. Sexual morph: Ascomata solitary, semi-immersed or superficial, globose, brown to dark brown, ostiolate, periphysate, with a prominent neck. Neck relatively long, cylindrical, curving or becoming erect. Peridium thick-walled, brown, comprising pseudoparenchymatous cells. Paraphyses filiform, septate, hyaline, simple to rarely branched. Asci 8-spored, unitunicate, cylindrical, short pedicellate, with a distinct, wedge-shaped, J-, apical ring. Ascospores uniseriate to overlapping biseriate in the ascus, fusoid to lunate, straight to slightly curved, 3-septate, central cells brown, end cells subhyaline, smooth-walled, without appendages or sheath. Asexual morph: Undetermined.

Notes – Annulatascus aquatorbae was collected from submerged wood test block of Erythrophleum teysmannii in Thailand (Boonyuen et al. 2012). It was placed in Annulatascus based on its cylindrical asci with a relatively large, refractive apical ring and 3-septate ascospores (Boonyuen et al. 2012). However, A. aquatorbae is distinctive by unevenly colored ascospores with brown central cells and subhyaline end cells, contrasting with the hyaline ascospores of other Annulatascus species, including our three new species. In addition, A. aquatorbae forms a separated clade from Annulatascus species in our updated phylogenetic tree, which corroborates other studies (Luo et al. 2015, 2019, Hyde et al. 2018, 2020). Annulatascus aquatorbae has been missing for almost 20 years since it was first collected in Thailand in 2003 (Boonyuen et al. 2012). In order to widen the taxonomic study of Annulatascaceae, we establish a new genus Longivarius to accommodate A. aquatorbae based on distinct morphology and phylogenetic analyses. 

Type species – Longivarius aquatorbae (Boonyuen & Sri-indr.) W. Dong, H. Zhang & K.D. Hyde.

Other accepted species: Species Fungorum – search Longivarius.

 

References

Boonyuen N, Sri-Indrasutdhi V, Suetrong S, Sivichai S, Jones EBG. 2012 – Annulatascus aquatorba sp. nov., a lignicolous freshwater ascomycete from Sirindhorn Peat Swamp Forest, Narathiwat, Thailand. Mycologia 104, 746–757.

Hyde KD, Chaiwan N, Norphanphoun C, Boonmee S et al. 2018 – Mycosphere notes 169–224. Mycosphere 9, 271–430.

Hyde KD, Norphanphoun C, Maharachchikumbura SSN, Bhat DJ et al. 2020 – Refined families of Sordariomycetes. Mycosphere 11, 305–1059.

Luo ZL, Hyde KD, Liu JK, Maharachchikumbura SSN et al. 2019 – Freshwater Sordariomycetes. Fungal Diversity 99, 451–660.

Luo ZL, Maharachchikumbura SSN, Liu XY, Chen LJ et al. 2015 – Annulatascus saprophyticus sp. nov. and Pseudoannulatascus gen. nov. to accommodate Annulatascus biatriisporus (Annulatascales, Sordariomycetes) from Thailand. Phytotaxa 239, 174–182.

 

Entry by

Wei Dong, Faculty of Agriculture and Food, Kunming University of Science & 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 for Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Haizhu District, Guangzhou 510225, China

 

Published online 15 February 2021

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