Occultibambusaceae D.Q. Dai & K.D. Hyde

Index Fungorum number: IF552012; Facesoffungi number: FoF 01973


Saprobic on dead bamboo culms or teak branches, forming dark, ascostromata on raised areas, with ostiolate oppening. Sexual morph: Ascostromata solitary, scattered or gregarious, subglobose, uni- or multi-loculate, greyish to dark brown, coriaceous, with a central, papillate, rounded ostiole, internally lined with periphyses. Peridium comprising host and fungal tissues or, only fungal tissue brown and thick-walled to hyaline and thin-walled cells of textura angularis. Hamathecium comprising long, septate, cellular pseudoparaphyses, above the asci. Asci 8-spored, bitunicate, broadly cylindrical to clavate, with a short furcate pedicel, with a shallow ocular chamber. Ascospores 2–3-seriate, slightly broad fusiform, hyaline, pale brown to dark brown, 1–3-septate, surrounded by a gelatinous sheath, with guttulate cells. Asexual morph: Coelomycetous, produced on bamboo pieces on WA. Conidiomata eustromatic, immersed to partly immersed, solitary to gregarious, globose to subglobose, conical in section, dark ostiolate, with a short neck. Conidiomata wall with several layers, composed of dark to hyaline cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells enteroblastic, phialidic, determinate, discrete, ampulliform to cylindrical, smooth-walled. Conidia obovoid, cylindrical to oblong, hyaline to pale brown, asepate or 1–3-septate, rounded at the apex, smooth-walled, guttulate. (Descriptions from Hyde et al. 2020)


Type: Occultibambusa D.Q. Dai & K.D. Hyde


Notes: Occultibambusaceae was introduced by Dai et al. (2017) to accommodate the genera Neooccultibambusa, Occultibambusa, Seriascoma and Versicolorisporium. Phookamsak et al. (2019) introduced Brunneofusispora in this family; thus, there are five genera accommodated in this family. Members of this family are normally characterized by immersed, solitary to gregarious ascomata with black ostioles, broadly cylindrical to clavate, bitunicate asci, cellular pseudoparaphyses and broad-fusiform, hyaline to dark brown ascospores with 1–3 septa, and diverse asexual morphs (Hatakeyama et al. 2008; Dai et al. 2017; Doilom et al. 2017). Species of Occultibambusaceae are reported usually on monocotyledons but have also been found on hardwood trees. Occultibambusaceae are similar to species of Bambusicola and Lophiostoma in having fusiform ascospores and clavate asci (Zhang et al. 2009; Dai et al. 2012, 2015). However, Bambusicola produces hyaline ascospores and asexual morphs with usually annellidic conidiogenous cells (Dai et al. 2012), while the taxa within Occultibambusaceae have brown ascospores, and no annellidic conidiogenous cells found in asexual morphs (Dai et al. 2017). Occultibambusaceae differs from Lophiostoma by its papillate ostiole, while the species of Lophiostoma are characterized in having a compressed/crest-like ostiole (Zhang et al. 2009; Thambugala et al. 2015). (Notes from Hyde et al. 2020)



Dai D, Bhat DJ, Liu J, Chukeatirote E, Zhao R, Hyde KD (2012) Bambusicola, a new genus from bamboo with asexual and sexual morphs. Cryptogam Mycol 33:363–379.

Dai DQ, Bahkali AH, Li WJ, Jayarama Bhat D, Zhao RL, Hyde KD (2015) Bambusicola loculata sp. nov. (Bambusicolaceae) from bamboo. Phytotaxa 213:122–130.

Dai DQ, Phookamsak R, Wijayawardene NN, Li WJ, Bhat DJ, Xu JC, Taylor JE, Hyde KD, Chukeatirote E (2017) Bambusicolous fungi. Fungal Divers 82:1–105.

Doilom M, Dissanayake AJ, Wanasinghe DN, Boonmee S, Liu J-K, Bhat DJ, Taylor JE, Bahkali AH, McKenzie EHC, Hyde KD (2017) Microfungi on Tectona grandis (Teak) in Northern Thailand. Fungal Divers 82:107–182.

Hatakeyama S, Tanaka K, Harada Y (2008) Bambusicolous fungi in Japan (7): A new coelomycetous genus, Versicolorisporium. Mycoscience 49:211–214.

Hyde KD, Norphanphoun C, Maharachchikumbura SSN, Bhat DJ, Jones EBG, Bundhun D, Chen Y-J, Bao D-F, Boonmee S, Calabon MS, Chaiwan N, Chethana K, Dai D, Dayarathne M, Devadatha B, Dissanayake A, Dissanayake L, Doilom M, Dong W, Fan X, Goonasekara I, Hongsanan S, Huang S, Jayawardena R, Jeewon R, Karunarathna A, Konta S, Kumar V, Lin C, Liu J, Liu N, Luangsa-ard J, Lumyong S, Luo Z, Marasinghe D, McKenzie E, Niego A, Niranjan M, Perera R, Phukhamsakda C, Rathnayaka A, Samarakoon M, Samarakoon S, Sarma V, Senanayake I, Shang Q, Stadler M, Tibpromma S, Wanasinghe D, Wei D, Wijayawardene N, Xiao Y, Yang J, Zeng X, Zhang S, Xiang M (2020) Refined families of Sordariomycetes. Mycosphere 11:305–1059.

Phookamsak R, Hyde KD, Jeewon R, Bhat DJ, Jones EBG, Maharachchikumbura SSN, Raspé O, Karunarathna SC, Wanasinghe DN, Hongsanan S, Doilom M, Tennakoon DS, Machado AR, Firmino AL, Ghosh A, Karunarathna A, Mešić A, Dutta AK, Thongbai B, Devadatha B, Norphanphoun C, Senwanna C, Wei D, Pem D, Ackah FK, Wang GN, Jiang HB, Madrid H, Lee HB, Goonasekara ID, Manawasinghe IS, Kušan I, Cano J, Gené J, Li J, Das K, Acharya K, Raj KNA, Latha KPD, Chethana KWT, He MQ, Dueñas M, Jadan M, Martín MP, Samarakoon MC, Dayarathne MC, Raza M, Park MS, Telleria MT, Chaiwan N, Matočec N, de Silva NI, Pereira OL, Singh PN, Manimohan P, Uniyal P, Shang QJ, Bhatt RP, Perera RH, Alvarenga RLM, Nogal-Prata S, Singh SK, Vadthanarat S, Oh SY, Huang SK, Rana S, Konta S, Paloi S, Jayasiri SC, Jeon SJ, Mehmood T, Gibertoni TB, Nguyen TTT, Singh U, Thiyagaraja V, Sarma VV, Dong W, Yu XD, Lu YZ, Lim YW, Chen Y, Tkalčec Z, Zhang ZF, Luo ZL, Daranagama DA, Thambugala KM, Tibpromma S, Camporesi E, Bulgakov TS, Dissanayake AJ, Senanayake IC, Dai DQ, Tang LZ, Khan S, Zhang H, Promputtha I, Cai L, Chomnunti P, Zhao RL, Lumyong S, Boonmee S, Wen TC, Mortimer PE, Xu J (2019) Fungal diversity notes 929–1035: taxonomic and phylogenetic contributions on genera and species of fungi. Fungal Divers 95:1–273.

Thambugala KM, Hyde KD, Tanaka K, Tian Q, Wanasinghe DN, Ariyawansa HA, Jayasiri SC, Boonmee S, Camporesi E, Hashimoto A, Hirayama K, Schumacher RK, Promputtha I, Liu ZY (2015) Towards a natural classification and backbone tree for Lophiostomataceae, Floricolaceae, and Amorosiaceae fam. nov. Fungal Divers 74:199–266.

Zhang Y, Fournier J, Crous PW, Pointing SB, Hyde KD (2009) Phylogenetic and morphological assessment of two new species of Amniculicola and their allies (Pleosporales). Persoonia - Mol Phylogeny Evol Fungi 23:48–54.


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